WO2019205355A1 - Multi-stage coal seam water injection borehole packing system and water injection borehole packing method - Google Patents

Multi-stage coal seam water injection borehole packing system and water injection borehole packing method Download PDF

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Publication number
WO2019205355A1
WO2019205355A1 PCT/CN2018/100392 CN2018100392W WO2019205355A1 WO 2019205355 A1 WO2019205355 A1 WO 2019205355A1 CN 2018100392 W CN2018100392 W CN 2018100392W WO 2019205355 A1 WO2019205355 A1 WO 2019205355A1
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Prior art keywords
water injection
coal seam
stage
sealing
drilling
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PCT/CN2018/100392
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French (fr)
Chinese (zh)
Inventor
于岩斌
程卫民
柳茹林
吕同
吴立荣
许庆峰
姜爱伟
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山东科技大学
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Publication of WO2019205355A1 publication Critical patent/WO2019205355A1/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/18—Impregnating walls, or the like, with liquids for binding dust
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/02—Valve arrangements for boreholes or wells in well heads
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/04—Ball valves

Definitions

  • the invention relates to the field of coal mine coal mining face disaster prevention and control, in particular to a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method.
  • the quality of the sealing hole of the water injection hole is directly related to the key problem of the dust-proof effect of the coal seam water injection.
  • the sealing method is to seal the hole with cement mortar.
  • the method takes a long time, the material waste is serious, the operation is inconvenient, the pressure bearing capacity is small, and the sealing hole length is fixed, which cannot meet the dynamic development requirement of the sealing hole length during the mining process.
  • the simple sealing method adopted by domestic coal mines is the sealing of the sealing device, but the traditional sealing device is mainly composed of hydraulic expansion, compressed air expansion and mechanical expansion, mainly used for short hole injection of coal wall, and for long drilling.
  • Coal seam water injection is limited by the length of sealing hole and structural design. It often has sealing quality problems such as water leakage and water immersion, and the sealing device is easy to be smashed under the action of high pressure water.
  • the water pressure in the sealer is reduced, the expansion rubber stopper shrinks, and the sealer is thrown at a high speed under the action of the pressure difference between the inside and the outside of the borehole, resulting in
  • the leakage of water in the borehole causes the underground working environment to deteriorate and seriously endangers the life safety of the underground workers. It can be seen that the existing conventional coal seam water sealing method and related sealing device need further improvement and development.
  • the object of the present invention is to provide a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method, which can effectively solve the coal seam water injection drill in the long injection period.
  • Hole sealing is not strict, water leakage, smashing and other issues to improve the effect of water injection and disaster reduction.
  • the solution of the present invention includes:
  • a multi-stage coal seam water injection drilling sealing system comprising a water supply mechanism and a multi-stage coal seam water injection drilling sealing mechanism, wherein the multi-stage coal seam water injection drilling sealing mechanism comprises a Class I complete seepage period unit, II Grade micro-cracking steady flow unit and class III crushing torrent unit, each unit includes at least one multi-stage coal seam water injection hole sealer, and water injection drilling seal for multi-stage coal seam according to the degree of coal wall fracture in the corresponding unit
  • the requirement of the length of the hole device increases or decreases the number of series stages of the multi-stage coal seam water injection drilling and sealing device, and dynamically seals the coal seam water injection hole.
  • the multi-stage coal seam water injection drilling and sealing system wherein the multi-stage coal seam water injection drilling hole sealing device comprises an outflow device, a hydraulic expansion sealing device and a fastening device arranged in series from front to back. And the automatic cut-off device, the four are connected in series by thread, and the automatic cut-off device is connected with the water injection pipe of the underground coal seam of the water supply mechanism.
  • the multi-stage coal seam water injection drilling and sealing system wherein the hydraulic expansion sealing device comprises a plurality of expanded steel hoses connected by a joint thread, and both ends of the expanded steel hose pass the internal thread joint or the external thread joint
  • the string is followed by an outflow device and a fastening device, the fastening device has a fastening inner tube, the inner tube is alternately sleeved with an expansion rubber plug and a support sleeve, and the end end of the fastening inner tube is sleeved with a fastening nut,
  • the fastening device is followed by an automatic shut-off device.
  • the expanded steel hose in the hydraulic expansion sealing device can be increased or decreased according to the required length of the sealing hole to provide a sealing length according to the actual situation.
  • the fastening device forms a threaded assembly by fastening the end of the inner tube to the joint of the hydraulic expansion plugging device.
  • Two sets of expansion rubber plugs and support sleeves are alternately arranged in the outer part of the fastening inner tube, and a fastening nut is arranged outside the end support sleeve, and the fastening nut is screwed through the thread of the end of the inner tube, thereby tightening
  • the mechanical pressing action of the solid nut causes the expansion rubber plug to expand and deform, so the degree of rotation of the fastening nut controls the expansion degree of the expansion rubber plug to meet the mechanical sealing requirements of the drill holes of different diameters.
  • the multi-stage coal seam water injection drilling and sealing system wherein the outflow device comprises a pressure regulating joint, the pressure regulating joint is inserted into the pressure regulating spring, and the end of the pressure regulating spring is provided with a shutoff valve, and one end of the shutoff valve
  • the cylindrical positioning end penetrates the above-mentioned pressure regulating spring, and the other end of the shutoff valve is a conical valve core, the cone top of the conical valve core abuts against the stepped end of the internal thread joint, and the expanded steel hose end
  • the joint of the head forms a threaded fit with the pressure regulating joint.
  • the pressure regulating joint is screwed with the joint of the hydraulic expansion sealing device, and the elastic potential energy of the pressure regulating spring is controlled by adjusting the length of the screwing screw, thereby adjusting the pressure of the water outlet, and achieving different expansion degrees of the hydraulic expansion sealing device, satisfying Sealing requirements for drilling holes of different diameters.
  • the multi-stage hydraulic expansion sealing device comprises a plurality of expanded steel hoses connected by a joint thread, and the threaded assembly ends of the joints are respectively connected by internal threads and external threads to realize the combined use of the multi-section sealing device.
  • the fastening device has an inner tube, and the inner tube is alternately sleeved with an expansion rubber plug and a support sleeve, and the end end of the inner tube is also sleeved with a fastening nut, and the fastening device is followed by an automatic cut-off device.
  • the multi-stage coal seam water injection drilling and sealing system wherein the automatic cut-off device comprises a shut-off valve body, the inner end of the shut-off valve body forms a threaded assembly with the fastening device, and the outer end of the shut-off valve body is provided with a quick joint.
  • the cut-off valve body is provided with a cut-off spring and a cut-off valve core, one end of the cut-off valve core penetrates the cut-off spring, and the other end is elastically abutted on the inlet of the flow-through chamber of the multi-stage coal seam water injection hole sealer.
  • the cut-off valve core is designed in a spherical shape, and the projected area thereof is larger than the end area of the cut-off spring and the cross-sectional area of the passage.
  • the shut-off valve body is further provided with a drain port, and the drain port is provided with a drain switch. The drain port and the drain switch are used to realize the pressure relief cycle of the plug sealer.
  • the multi-stage coal seam water injection drilling and sealing system wherein the above-mentioned shut-off valve body is further provided with a discharge port, and a discharge switch is arranged on the discharge port.
  • the multi-stage coal seam water injection drilling and sealing system comprises a downhole water pipe, and the underground water pipe is connected with the water storage tank through a connecting pipe, and the water storage tank is connected with the water injection pump through a corresponding pipeline, and the water injection pump passes through the three-way pipe.
  • the water injection pipeline is connected and connected, and a flow meter and a pressure gauge are arranged on the corresponding pipeline, and the three-way component is connected with a one-way shut-off valve through a corresponding pipeline, and the one-way shutoff valve is connected with the water storage tank.
  • a multi-stage coal seam water injection drilling sealing method with the above multi-stage coal seam water injection drilling sealing system comprises the following steps:
  • the 1-3 grade coal seam water injection drilling and sealing device is used to seal the I-stage complete seepage period unit, and the corresponding multi-stage coal seam water injection drilling and sealing device is arranged to make the expansion steel hose have sufficient water pressure.
  • the multi-stage coal seam water injection drilling and sealing device connected in series is placed in the coal seam water injection hole to expand the expansion rubber plug, and the multi-stage coal seam water injection drilling and sealing device is fastened to the water injection hole.
  • close the drain switch connect the downhole water injection pipeline with the quick joint, perform hydraulic expansion and sealing, and coal seam water injection;
  • the sealing device seals the II-stage micro-cracking steady flow unit, and separates the water injection pipeline and the quick joint in the I-stage complete seepage period unit, and the water injection hole in the I-stage complete seepage period unit is fully wetted by the water injection hole.
  • the 4-6 coal seam water injection drilling and sealing device is placed in the water injection hole of the second-stage micro-cracking steady flow unit, and tightened with a wrench.
  • the fastening nut of the device causes the expansion rubber plug to expand, so that the sealing device is fastened inside the water injection hole; the expansion rubber plug is expanded, and the multi-stage coal seam water injection drilling and sealing device is fastened inside the water injection hole; Drain switch, the underground water injection pipeline and fast The joints are connected, hydraulic expansion and sealing, and coal seam water injection work.
  • the invention provides a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method.
  • the flexible combined multi-stage hydraulic expansion sealing structure of the invention can effectively solve different water injection periods of long drilling holes.
  • the sealing problem combined with the fastening device and the automatic cutting device, further ensures the safety and high efficiency of the coal seam water injection process, especially the sealing compactness, safety and reliability of the sealing device during high pressure water injection, and has the advantages of simple structure and convenient operation.
  • the utility model has the advantages of low cost, strong sealing flexibility, and the like, and can effectively solve the problems of insufficient sealing, water leakage and squeezing of the coal injection hole in the excessively long water injection period, so as to improve the effect of water injection and disaster reduction.
  • FIG. 1 is a schematic view of a multi-stage coal seam water injection drilling and sealing system according to the present invention
  • FIG. 2 is a schematic view of a multi-stage coal seam water injection drilling hole sealer according to the present invention
  • the invention provides a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method.
  • a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method.
  • the present invention is further described in detail below. . It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • the invention provides a multi-stage coal seam water injection drilling and sealing system, as shown in Fig. 1 and Fig. 2, the drilling water injection period is divided into a Class I complete seepage period and a Class II micro as the work faces forward.
  • the fission steady flow period and the third-stage fracture torrent period are further divided into a Class I complete seepage period unit, a Class II microcracking steady flow unit, and a Class III broken torrent unit.
  • it can be divided according to distance, such as 100 meters from the working surface.
  • the area of 200 meters is the class III crushing torrent, and so on, of course, it can also be adapted according to the site construction conditions.
  • the multi-stage coal seam water injection drilling hole sealer of the invention comprises an outflow device, a hydraulic expansion sealing device, a fastening device and an automatic cut-off device which are sequentially connected in series from front to back. As shown in Fig. 2, the four-part device is connected in series by threads, and the automatic shut-off device is connected with the water injection pipe 9 in the underground.
  • the water injection pipe 9 supplies water to the multi-stage coal seam water injection drilling and sealing device, and the water supply mechanism includes underground
  • the water pipe 1, the downhole water pipe 1 is connected to the water storage tank 2 through the connecting pipe 3, and the water storage tank 2 is connected to the water injection pump 4 through a corresponding pipeline, and the water injection pump 4 is connected to the water injection pipeline 9 through the three-way member 8, and the corresponding pipeline
  • the flow meter 5 and the pressure gauge 6 are disposed, and the three-way member 8 is connected to a one-way shut-off valve 7 through a corresponding pipeline, and the one-way shutoff valve 7 communicates with the water storage tank 2, and the water pressure in the water injection pipeline 9 When it is too large, it flows back into the water storage tank 2 through the one-way shutoff valve 7.
  • the outflow device of the multi-stage coal seam water injection drilling and sealing device of the invention comprises a pressure regulating joint 14, and the pressure regulating joint 14 is inserted into the pressure regulating spring 15, and the end of the pressure regulating spring 15 is provided with a shut-off valve 16, a pressure regulating spring
  • the diameter of one end of 15 is larger than the diameter of the outlet of the pressure regulating joint 14, and the other end is matched with the shutoff valve 16.
  • the pressure regulating joint 14 is connected in series with the hydraulic expansion sealing device.
  • One end of the shutoff valve 16 is a cylindrical positioning end, the cylindrical positioning end penetrates the pressure regulating spring 15, and the other end of the shutoff valve 16 is a conical valve core.
  • the cone top of the spool abuts against the stepped end of the female threaded joint 17.
  • the pressure regulating joint 14 is screwed with the female threaded joint 17 of the hydraulic expansion sealing device, and the elastic potential energy of the pressure regulating spring 15 is controlled by adjusting the length of the screwing screw, thereby adjusting the pressure of the water outlet to realize the hydraulic expansion sealing device. Different degrees of expansion to meet the sealing requirements of different diameter drill holes.
  • the hydraulic expansion sealing device comprises a plurality of expanded steel hoses 18 connected in series by the female threaded joints 17, and the hydraulic expansion sealing device realizes the multi-section sealing device by the joint connection manner of the female threaded joints 17 and the externally threaded joints 19
  • the series use of the expanded steel hose 18 at both ends is also connected in series to other devices through the female joint 17 and the male joint 19.
  • the female threaded joint 17 of the front end of the expanded steel hose hose 18 is threadedly assembled with the pressure regulating joint 14, and the male threaded joint 19 of the rear end of the expanded steel hose hose 18 is threadedly assembled with the fastening inner tube 20 of the fastening device.
  • Two sets of expansion rubber plugs 21 and support sleeves 22 are alternately arranged in the outer periphery of the fastening inner tube 20, and a fastening nut 23 is arranged outside the end support sleeve 22, and the fastening nut 23 passes through the thread of the end of the inner tube 20.
  • the screwing operation is performed, whereby the expansion rubber plug 21 is expanded and deformed by the mechanical pressing action of the fastening nut 23, and the degree of rotation of the fastening nut 23 controls the degree of expansion of the expansion rubber plug 21 to meet the mechanical drilling of different diameters. Sealing requirements.
  • the automatic shutoff device includes a shutoff valve body 24, the front end of the shutoff valve body 24 is threadedly fitted with the rear end of the fastening inner tube 20, and the outer end of the shutoff valve body 24 is provided with a quick joint 29.
  • a cut-off spring 25 and a shut-off valve core 26 are disposed in the shut-off valve body 24, specifically, the flow-closing chamber is provided in the shut-off valve body 24, the cut-off spring 25 is disposed in the flow-through chamber, and one end of the shut-off valve core 26 penetrates the cut-off spring 25, and One end is resiliently abutted against the inlet of the throughflow chamber.
  • the cut-off spool 26 is designed in a spherical shape, and its projected area is larger than the end area of the cut-off spring 25 and the cross-sectional area of the passage.
  • a drain port 27 is also formed in the shutoff valve body 24.
  • a drain switch 28 is disposed on the drain port 27, and the pressure relief port of the plug sealer is realized through the drain port 27 and the drain switch 28.
  • the assembly process and the use method of the multi-stage coal seam water injection drilling and sealing system of the present invention are as follows: the cylindrical positioning end of the shut-off valve 16 is placed in the pressure regulating spring 15, and then the whole is placed in the pressure regulating joint 14 to make the cutoff
  • the conical spool of the valve 16 is upwardly connected to the internally threaded joint 17 of the hydraulic expansion sealing device by screw fitting, and sequentially passed through the externally threaded joint 19 to the fastening inner tube 20 of the fastening device.
  • the two sets of expansion rubber plugs 21 and the support sleeve 22 are alternately arranged in the outer periphery of the fastening inner tube 20, and the outer side of the support sleeve 22 is provided with a fastening nut 23 outside, and the rear end of the inner tube 20 is fixed at a certain distance.
  • the fastening nut 23 can adjust the screwing position on the external thread of the section, the end of the fastening inner tube 20 is threadedly connected with the shut-off valve body 24 of the automatic cut-off device, and the cut-off spring 25 and the cut-off spool 26 are sequentially located at the shut-off valve In the body 24, the quick joint 29 of the automatic shut-off device is connected to the downhole water injection pipe 9 to complete the assembly of the first-stage coal seam water injection drilling sealer.
  • the two-stage hydraulic expansion sealing device is connected in series by the internal threaded joint 17 and the externally threaded joint 19, and the assembly steps of the above-mentioned outflow device, hydraulic expansion sealing device, fastening device and automatic cut-off device are repeated to complete the second-order coal seam Water injection drilling sealer assembly.
  • the multi-section hydraulic expansion sealing device is connected through the cooperation of the female threaded joint 17 and the male threaded joint 19, and the above assembly steps are repeated to complete the multi-stage coal seam water injection drilling and sealing device assembly.
  • the fastening nut 23 of the fastening device is screwed by a wrench to promote the expansion of the expansion rubber plug 21, so that the multi-stage coal seam water injection hole sealing device is fastened inside the water injection hole;
  • the switch 28 connects the downhole water injection pipe 9 with the quick joint 29 to perform hydraulic expansion sealing and coal seam water injection work.
  • the water injection pipe 9 is separated from the quick joint 29, and the automatic shut-off device prevents the reverse pressure of the water in the borehole, and the fastening device prevents the sealer from being thrown out by the internal pressure water of the borehole, thereby realizing the safety of the water injection work.
  • the drain switch 28 is opened, the remaining pressure water in the corresponding water injection hole 10 is discharged, and then the tightening nut 23 is rotated to restore the expansion rubber plug 21 to the original state, and taken out.
  • the hole sealer is separated from the fastening device and the hydraulic expansion sealing device, and the threaded fitting of the female threaded joint 17 and the male threaded joint 19 is used to appropriately increase the series number of the multi-stage coal seam water injection drilling and sealing device, To meet the requirements of the length of the sealing hole, the fastening device and the hydraulic expansion sealing device are normally assembled, and the multi-stage coal seam water injection drilling and sealing device is placed in the corresponding water injection hole 10, and the fastening device is screwed into the fastening device.
  • the nut 23 causes the expansion rubber plug 21 to expand, so that the multi-stage coal seam water injection hole sealer is fastened inside the corresponding water injection hole 10; the drain switch 28 is closed, and the underground water injection pipe 9 is connected with the quick joint 29 for performing Hydraulic expansion sealing and coal seam water injection work.
  • the third-stage crushing torrent period that is, the class II micro-cracking steady-flow period unit is transformed into the class III-breaking torrent unit, and the length of the sealing hole required for this period is long, and the series of series of sealing units for water injection for long-hole coal seams should be continued. It is made to reach the 7-10 level, and the sealing section 13 as the class III crushing torrent unit performs the sealing operation.

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Abstract

Disclosed are a multi-stage coal seam water injection borehole packing system and a multi-stage coal seam water injection borehole packing method, with the use of a corresponding multi-stage coal seam water injection borehole packing apparatus, thus realizing effective packing of the same water injection borehole (10) in different mining-influenced areas. The multi-stage coal seam water injection borehole packing apparatus mainly comprises an outflow device, a hydraulic expansion hole packing device, a fastening device and an automatic cutoff device which are sequentially connected in series from front to back. Dynamically differential hole packing in the different mining influenced areas is realized by means of adjusting the number of stages of the multi-stage coal seam water injection borehole packing apparatus.

Description

一种多级式煤层注水钻孔封孔***及注水钻孔封孔方法Multi-stage coal seam water injection drilling sealing system and water injection drilling sealing method 技术领域Technical field
本发明涉及煤矿采煤工作面灾害防治领域，尤其涉及一种多级式煤层注水钻孔封孔***及多级式煤层注水钻孔封孔方法。The invention relates to the field of coal mine coal mining face disaster prevention and control, in particular to a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method.
背景技术Background technique
作为煤矿井下生产的次生产物——粉尘，一直困扰着煤矿井下安全生产。粉尘的存在不仅加快设备损耗，而且容易引起瓦斯煤尘***事故，造成巨大的经济损失，严重威胁着煤矿企业的安全高效生产。此外，长期处于高浓度粉尘作业场所，工人易患职业尘肺病，损害工人的健康。目前，众多研究与实践表明，传统的煤层注水预湿煤体是采掘工作面最基本、最有效的防尘措施之一，其在作业之前预先向煤层中打若干钻孔，通过钻孔预注入高压水，注入煤体的高压水沿煤的裂隙向被裂隙分割的煤块渗透并储存于裂隙和孔隙中，从而增加煤体水分，湿润煤体内原生的煤尘，使其失去飞扬能力，减少煤岩开采过程中产生浮游粉尘的能力。除受煤层自身客观条件影响之外，注水钻孔封孔质量的好坏是直接关系到煤层注水防尘效果的关键问题。As a secondary production of coal mine underground production, dust has been plagued by coal mine safety production. The presence of dust not only accelerates equipment loss, but also easily causes gas and coal dust explosion accidents, causing huge economic losses and seriously threatening the safe and efficient production of coal mining enterprises. In addition, long-term high-concentration dust workplaces, workers are prone to occupational pneumoconiosis, and damage the health of workers. At present, many studies and practices have shown that the traditional coal seam water-injection pre-wet coal body is one of the most basic and effective dust-proof measures for the mining face. It is pre-injected into the coal seam by drilling several holes before the operation. High-pressure water, high-pressure water injected into the coal body penetrates along the coal fissures and is stored in the fissures and pores, thereby increasing the moisture of the coal body, moistening the original coal dust in the coal body, causing it to lose its flying capacity and reduce The ability to produce floating dust during coal mining. In addition to being affected by the objective conditions of the coal seam itself, the quality of the sealing hole of the water injection hole is directly related to the key problem of the dust-proof effect of the coal seam water injection.
煤矿工作面开采过程中，注水钻孔所承受的采动应力不断发生变化，使得钻孔周围的煤壁破碎程度亦动态发展变化，从而使得注水钻孔的有效封孔长度不固定，以往传统的封孔方法是采用水泥砂浆封孔，该方法耗费时间长、材料浪费严重、操作不便、承压能力小，且封孔长度固定，不能满足工作面开采过程中对封孔长度的动态发展要求。目前国内煤矿主要采用的简便式封孔方式是封孔器封孔，但传统的封孔器以水力膨胀、压气膨胀与机械膨胀为主，主要用于煤壁短孔注水，而对于长钻孔煤层注水，尤其是高压注水条件下，其受封孔长度较短、结构设计等方面的制约，常常出现漏水、窜水等封孔质量问题，且在高承压水作用下封孔器容易窜出，尤其是传统的水力膨胀封孔器在停止或间歇注水期间，封孔器内水压降低，膨胀胶塞收缩，在钻孔内外压差的作用下，封孔器被高速抛出，造成钻孔存水外泄，造成井下工作环境恶化的同时严重危害井下工作人员的生命安全，由此可见，现有传统的煤层注水封孔方法和相关封孔器有待于更进一步的改进和发展。During the mining process of the coal mining face, the mining stress experienced by the water injection drilling hole changes continuously, so that the degree of coal wall fracture around the drilling hole also dynamically changes, so that the effective sealing length of the water injection drilling hole is not fixed. The sealing method is to seal the hole with cement mortar. The method takes a long time, the material waste is serious, the operation is inconvenient, the pressure bearing capacity is small, and the sealing hole length is fixed, which cannot meet the dynamic development requirement of the sealing hole length during the mining process. At present, the simple sealing method adopted by domestic coal mines is the sealing of the sealing device, but the traditional sealing device is mainly composed of hydraulic expansion, compressed air expansion and mechanical expansion, mainly used for short hole injection of coal wall, and for long drilling. Coal seam water injection, especially under high pressure water injection conditions, is limited by the length of sealing hole and structural design. It often has sealing quality problems such as water leakage and water immersion, and the sealing device is easy to be smashed under the action of high pressure water. Out, especially the traditional hydraulic expansion sealer during the stop or intermittent water injection, the water pressure in the sealer is reduced, the expansion rubber stopper shrinks, and the sealer is thrown at a high speed under the action of the pressure difference between the inside and the outside of the borehole, resulting in The leakage of water in the borehole causes the underground working environment to deteriorate and seriously endangers the life safety of the underground workers. It can be seen that the existing conventional coal seam water sealing method and related sealing device need further improvement and development.
发明内容Summary of the invention
鉴于上述现有技术的不足，本发明的目的在于提供一种多级式煤层注水钻孔封孔***及多级式煤层注水钻孔封孔方法，能够有效的解决注水周期过长中煤层注水钻孔封堵不严、漏水、窜出等问题，以提高注水减灾效果。In view of the above deficiencies of the prior art, the object of the present invention is to provide a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method, which can effectively solve the coal seam water injection drill in the long injection period. Hole sealing is not strict, water leakage, smashing and other issues to improve the effect of water injection and disaster reduction.
为解决上述技术问题，本发明方案包括：In order to solve the above technical problem, the solution of the present invention includes:
一种多级式煤层注水钻孔封孔***，其包括供水机构与多级式煤层注水钻孔封孔机构，其中，多级式煤层注水钻孔封孔机构包括Ⅰ级完整渗流期单元、Ⅱ级微裂稳流期单元、Ⅲ级破碎激流期单元，每个单元包括至少一个多级式煤层注水钻孔封孔器，并根据对应单元内煤壁破碎程度对多级式煤层注水钻孔封孔器长度的需求，增加或减少多级式煤层注水钻孔封孔器的串联级数，对煤层注水钻孔进行动态差异封孔。A multi-stage coal seam water injection drilling sealing system, comprising a water supply mechanism and a multi-stage coal seam water injection drilling sealing mechanism, wherein the multi-stage coal seam water injection drilling sealing mechanism comprises a Class I complete seepage period unit, II Grade micro-cracking steady flow unit and class III crushing torrent unit, each unit includes at least one multi-stage coal seam water injection hole sealer, and water injection drilling seal for multi-stage coal seam according to the degree of coal wall fracture in the corresponding unit The requirement of the length of the hole device increases or decreases the number of series stages of the multi-stage coal seam water injection drilling and sealing device, and dynamically seals the coal seam water injection hole.
所述的多级式煤层注水钻孔封孔***，其中，上述多级式煤层注水钻孔封孔器包括由前至后顺次串接的出流装置、水力膨胀封孔装置、紧固装置及自动截止装置，四者依次通过螺纹串联连接，自动截止装置与供水机构的井下煤层的注水管路相连接接。The multi-stage coal seam water injection drilling and sealing system, wherein the multi-stage coal seam water injection drilling hole sealing device comprises an outflow device, a hydraulic expansion sealing device and a fastening device arranged in series from front to back. And the automatic cut-off device, the four are connected in series by thread, and the automatic cut-off device is connected with the water injection pipe of the underground coal seam of the water supply mechanism.
所述的多级式煤层注水钻孔封孔***，其中，上述水力膨胀封孔装置包括多节由接头螺纹串接的膨胀钢丝胶管，且膨胀钢丝胶管的两端通过内螺纹接头或外螺纹接头串接着出流装置和紧固装置，该紧固装置具有紧固内管，紧固内管上交替套接膨胀胶塞和支撑套管，且紧固内管的尾端套接紧固螺母，紧固装置后接自动截止装置。其中水力膨胀封孔装置中的膨胀钢丝胶管可根据所需封孔的长度要求进行增加或减少，以提供符合实际情况的封孔长度。紧固装置通过紧固内管端部与水力膨胀封孔装置的接头形成螺纹装配。紧固内管外部依次交替设有两组膨胀胶塞与支撑套管，末尾的支撑套管外侧设有紧固螺母，紧固螺母通过内管端头的螺纹进行旋进操作，由此通过紧固螺母的机械挤压作用使膨胀胶塞膨胀变形，故紧固螺母的旋进程度控制膨胀胶塞的膨胀程度，以满足不同直径钻孔的机械封孔要求。The multi-stage coal seam water injection drilling and sealing system, wherein the hydraulic expansion sealing device comprises a plurality of expanded steel hoses connected by a joint thread, and both ends of the expanded steel hose pass the internal thread joint or the external thread joint The string is followed by an outflow device and a fastening device, the fastening device has a fastening inner tube, the inner tube is alternately sleeved with an expansion rubber plug and a support sleeve, and the end end of the fastening inner tube is sleeved with a fastening nut, The fastening device is followed by an automatic shut-off device. The expanded steel hose in the hydraulic expansion sealing device can be increased or decreased according to the required length of the sealing hole to provide a sealing length according to the actual situation. The fastening device forms a threaded assembly by fastening the end of the inner tube to the joint of the hydraulic expansion plugging device. Two sets of expansion rubber plugs and support sleeves are alternately arranged in the outer part of the fastening inner tube, and a fastening nut is arranged outside the end support sleeve, and the fastening nut is screwed through the thread of the end of the inner tube, thereby tightening The mechanical pressing action of the solid nut causes the expansion rubber plug to expand and deform, so the degree of rotation of the fastening nut controls the expansion degree of the expansion rubber plug to meet the mechanical sealing requirements of the drill holes of different diameters.
所述的多级式煤层注水钻孔封孔***，其中，上述出流装置包括调压接头，该调压接头内穿入调压弹簧，该调压弹簧的末端设置截止阀，截止阀的一端为圆柱定位端，该圆柱定位端穿入上述调压弹簧，截止阀的另一端为锥形阀芯，该锥形阀芯的锥顶抵靠在内螺纹接头的台阶口上，并且膨胀钢丝胶管端头的接头与调压接头形成螺纹装配。调压接头与水力膨胀封孔装置的接头进行螺纹连接，利用调节螺纹旋拧的长度控制调压弹簧的弹性势能，进而达到调节出水压力的大小，实现水力膨胀封孔装置的不同膨胀程度，满足不同直径钻孔的封孔需求。多级的水力膨胀封孔装置包括多节由接头螺纹串接的膨胀钢丝胶管，接头的螺纹组配端分别采用内螺纹、外螺纹的连接方式，以实现多节封孔器的组合使用，所述紧固装置具有内管，所述内管上交替套接膨胀胶塞和支撑套管，且内管的尾端还套接紧固螺母，紧固装置后接自动截止装置。The multi-stage coal seam water injection drilling and sealing system, wherein the outflow device comprises a pressure regulating joint, the pressure regulating joint is inserted into the pressure regulating spring, and the end of the pressure regulating spring is provided with a shutoff valve, and one end of the shutoff valve The cylindrical positioning end penetrates the above-mentioned pressure regulating spring, and the other end of the shutoff valve is a conical valve core, the cone top of the conical valve core abuts against the stepped end of the internal thread joint, and the expanded steel hose end The joint of the head forms a threaded fit with the pressure regulating joint. The pressure regulating joint is screwed with the joint of the hydraulic expansion sealing device, and the elastic potential energy of the pressure regulating spring is controlled by adjusting the length of the screwing screw, thereby adjusting the pressure of the water outlet, and achieving different expansion degrees of the hydraulic expansion sealing device, satisfying Sealing requirements for drilling holes of different diameters. The multi-stage hydraulic expansion sealing device comprises a plurality of expanded steel hoses connected by a joint thread, and the threaded assembly ends of the joints are respectively connected by internal threads and external threads to realize the combined use of the multi-section sealing device. The fastening device has an inner tube, and the inner tube is alternately sleeved with an expansion rubber plug and a support sleeve, and the end end of the inner tube is also sleeved with a fastening nut, and the fastening device is followed by an automatic cut-off device.
所述的多级式煤层注水钻孔封孔***，其中，上述自动截止装置包括截止阀体，该截止阀体的内端与紧固装置形成螺纹装配，截止阀体的外端设置快速接头，该截止阀体内设置截止弹簧与截止阀芯，截止阀芯的一端穿入截止弹簧，另一端弹性顶靠在多级式煤层注水钻孔 封孔器之通流室的进口上。截止阀芯以球面状设计，且其投影面积大于截止弹簧端面积与通道断面面积，所述截止阀体上还开设泄流口，所述泄流口上设置泄流开关。泄流口及泄流开关以实现封孔器的卸压循环利用。The multi-stage coal seam water injection drilling and sealing system, wherein the automatic cut-off device comprises a shut-off valve body, the inner end of the shut-off valve body forms a threaded assembly with the fastening device, and the outer end of the shut-off valve body is provided with a quick joint. The cut-off valve body is provided with a cut-off spring and a cut-off valve core, one end of the cut-off valve core penetrates the cut-off spring, and the other end is elastically abutted on the inlet of the flow-through chamber of the multi-stage coal seam water injection hole sealer. The cut-off valve core is designed in a spherical shape, and the projected area thereof is larger than the end area of the cut-off spring and the cross-sectional area of the passage. The shut-off valve body is further provided with a drain port, and the drain port is provided with a drain switch. The drain port and the drain switch are used to realize the pressure relief cycle of the plug sealer.
所述的多级式煤层注水钻孔封孔***，其中，上述截止阀体上还设置有泄流口，该泄流口上设置泄流开关。The multi-stage coal seam water injection drilling and sealing system, wherein the above-mentioned shut-off valve body is further provided with a discharge port, and a discharge switch is arranged on the discharge port.
所述的多级式煤层注水钻孔封孔***，上述供水机构包括井下水管，井下水管通过连接管与储水箱相连接，储水箱通过相应管路与注水泵相连接，注水泵通过三通件与注水管路相连连接，相应管路上设置有流量表与压力表，三通件通过对应管路与一单向截止阀相连接，该单向截止阀与储水箱相连通。The multi-stage coal seam water injection drilling and sealing system, the water supply mechanism comprises a downhole water pipe, and the underground water pipe is connected with the water storage tank through a connecting pipe, and the water storage tank is connected with the water injection pump through a corresponding pipeline, and the water injection pump passes through the three-way pipe. The water injection pipeline is connected and connected, and a flow meter and a pressure gauge are arranged on the corresponding pipeline, and the three-way component is connected with a one-way shut-off valve through a corresponding pipeline, and the one-way shutoff valve is connected with the water storage tank.
一种带有上述多级式煤层注水钻孔封孔***的多级式煤层注水钻孔封孔方法，其包括以下步骤：A multi-stage coal seam water injection drilling sealing method with the above multi-stage coal seam water injection drilling sealing system comprises the following steps:
A、采用1-3级煤层注水钻孔封孔器对Ⅰ级完整渗流期单元进行封孔，取相应的多级式煤层注水钻孔封孔器进行布置，使得膨胀钢丝胶管有足够的水压满足膨胀直径需求，将串连完毕的多级式煤层注水钻孔封孔器置于煤层注水孔中，使膨胀胶塞膨胀，将多级式煤层注水钻孔封孔器紧固于注水钻孔内部；关闭泄流开关，将井下注水管路与快速接头相连接，进行水力膨胀封孔以及煤层注水工作；A. The 1-3 grade coal seam water injection drilling and sealing device is used to seal the I-stage complete seepage period unit, and the corresponding multi-stage coal seam water injection drilling and sealing device is arranged to make the expansion steel hose have sufficient water pressure. To meet the expansion diameter requirement, the multi-stage coal seam water injection drilling and sealing device connected in series is placed in the coal seam water injection hole to expand the expansion rubber plug, and the multi-stage coal seam water injection drilling and sealing device is fastened to the water injection hole. Internal; close the drain switch, connect the downhole water injection pipeline with the quick joint, perform hydraulic expansion and sealing, and coal seam water injection;
B、随着工作面的推进，Ⅰ级完整渗流期单元内的注水钻孔与工作面的距离不断缩短，注水钻孔进入Ⅱ级微裂稳流期单元，使用4-6级煤层注水钻孔封孔器对Ⅱ级微裂稳流期单元进行封孔，将Ⅰ级完整渗流期单元内的注水管路与快速接头分离，待Ⅰ级完整渗流期单元内的注水钻孔注入水分充分润湿煤体抑或停止煤层注水工作后，打开泄流开关，将钻孔中剩余压力水排出，而后使得膨胀胶塞恢复原状，取出Ⅰ级完整渗流期单元内的1-3级煤层注水钻孔封孔器并加长至4-6级煤层注水钻孔封孔器，将4-6级煤层注水钻孔封孔器置于Ⅱ级微裂稳流期单元的注水钻孔中，利用扳手旋进紧固装置的紧固螺母，促使膨胀胶塞膨胀，使得封孔器紧固于注水钻孔内部；使膨胀胶塞膨胀，将多级式煤层注水钻孔封孔器紧固于注水钻孔内部；关闭泄流开关，将井下注水管路与快速接头相连接，进行水力膨胀封孔以及煤层注水工作。B. With the advancement of the working face, the distance between the water injection borehole and the working face in the I-stage complete seepage period unit is shortened, and the water injection borehole enters the class II micro-cracking steady flow period unit, and the 4-6 grade coal seam water injection hole is used. The sealing device seals the II-stage micro-cracking steady flow unit, and separates the water injection pipeline and the quick joint in the I-stage complete seepage period unit, and the water injection hole in the I-stage complete seepage period unit is fully wetted by the water injection hole. After the coal body stops or stops the coal seam water injection work, open the drain switch to discharge the remaining pressure water in the borehole, and then return the expansion rubber plug to the original state, and take out the 1-3 grade coal seam water injection hole sealing hole in the I-stage complete seepage period unit. And lengthened to the 4-6 coal seam water injection drilling and sealing device, the 4-6 coal seam water injection drilling and sealing device is placed in the water injection hole of the second-stage micro-cracking steady flow unit, and tightened with a wrench. The fastening nut of the device causes the expansion rubber plug to expand, so that the sealing device is fastened inside the water injection hole; the expansion rubber plug is expanded, and the multi-stage coal seam water injection drilling and sealing device is fastened inside the water injection hole; Drain switch, the underground water injection pipeline and fast The joints are connected, hydraulic expansion and sealing, and coal seam water injection work.
C、随着工作面的推进，Ⅱ级微裂稳流期单元内的注水钻孔与工作面的距离进一步缩短，使用7-0级煤层注水钻孔封孔器对Ⅲ级破碎激流期单元进行封孔，取出Ⅱ级微裂稳流期单元的4-6级煤层注水钻孔封孔器并加长至7-10级煤层注水钻孔封孔器，重复步骤B中多级式煤层注水钻孔封孔器拆卸、增加水力膨胀封孔装置串联级数、装配过程步骤，关闭泄流开关，将井下注水管路与快速接头相连接，进行水力膨胀封孔以及煤层注水工作；C. With the advancement of the working face, the distance between the water injection borehole and the working face in the Class II micro-cracking steady flow unit is further shortened, and the Class III crushing torrent unit is used by using the 7-0 coal seam water injection drilling sealer. Sealing, take out the 4-6 coal seam water injection drilling sealer of the II grade micro-cracking steady flow unit and lengthen it to the 7-10 coal seam water injection drilling sealer, repeat the multi-stage coal seam water injection drilling in step B The sealing device is disassembled, the number of series of hydraulic expansion and sealing devices is increased, the assembly process steps are closed, the discharge switch is closed, the underground water injection pipe is connected with the quick joint, and the hydraulic expansion sealing and the coal seam water injection work are performed;
如此反复操作直至煤层开采完毕。This operation is repeated until the coal seam is completed.
本发明提供的一种多级式煤层注水钻孔封孔***及多级式煤层注水钻孔封孔方法，本发明可灵活组合的多级水力膨胀封孔结构解决长钻孔不同注水时期的有效封孔问题，并结合紧固装置与自动截止装置进一步保障煤层注水过程中的安全、高效，尤其是高压注水时封孔器的封堵密实性与安全、可靠性，同时具有结构简单、操作方便、成本低廉、封孔灵活性强等优点，能够有效的解决注水周期过长中煤层注水钻孔封堵不严、漏水、窜出等问题，以提高注水减灾效果The invention provides a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method. The flexible combined multi-stage hydraulic expansion sealing structure of the invention can effectively solve different water injection periods of long drilling holes. The sealing problem, combined with the fastening device and the automatic cutting device, further ensures the safety and high efficiency of the coal seam water injection process, especially the sealing compactness, safety and reliability of the sealing device during high pressure water injection, and has the advantages of simple structure and convenient operation. The utility model has the advantages of low cost, strong sealing flexibility, and the like, and can effectively solve the problems of insufficient sealing, water leakage and squeezing of the coal injection hole in the excessively long water injection period, so as to improve the effect of water injection and disaster reduction.
附图说明DRAWINGS
图1为本发明中多级式煤层注水钻孔封孔***的示意图；1 is a schematic view of a multi-stage coal seam water injection drilling and sealing system according to the present invention;
图2为本发明中多级式煤层注水钻孔封孔器的示意图；2 is a schematic view of a multi-stage coal seam water injection drilling hole sealer according to the present invention;
其中，1、井下水管；2、储水箱；3、连接管；4、注水泵；5、流量表；6、压力表；7、单向截止阀；8、三通件；9、注水管路；10、注水钻孔；11、Ⅰ级完整渗流期单元的封孔段；12、Ⅱ级微裂稳流期单元的封孔段；13、Ⅲ级破碎激流期单元的封孔段；14、调压接头；15、调压弹簧；16、截止阀；17、内螺纹接头；18、膨胀钢丝胶管；19、外螺纹接头；20、紧固内管；21、膨胀胶塞；22、支撑套管；23、紧固螺母；24、截止阀体；25、截止弹簧；26、截止阀芯；27、泄流口；28、泄流开关；29、快速接头。Among them, 1, underground water pipe; 2, water storage tank; 3, connecting pipe; 4, water injection pump; 5, flow meter; 6, pressure gauge; 7, one-way stop valve; 8, three-way parts; 10, water injection drilling; 11, the sealing section of the I-stage complete seepage period unit; the sealing section of the 12-stage and II-stage micro-cracking steady-flow period unit; and the sealing section of the 13-stage crushing torrent unit; Pressure regulating joint; 15, pressure regulating spring; 16, shut-off valve; 17, internal thread joint; 18, expanded steel hose; 19, external thread joint; 20, fastening inner tube; 21, expansion rubber plug; Tube; 23, fastening nut; 24, shut-off valve body; 25, cut-off spring; 26, cut-off spool; 27, discharge port; 28, drain switch; 29, quick connector.
具体实施方式detailed description
本发明提供了一种多级式煤层注水钻孔封孔***及多级式煤层注水钻孔封孔方法，为使本发明的目的、技术方案及效果更加清楚、明确，以下对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。The invention provides a multi-stage coal seam water injection drilling sealing system and a multi-stage coal seam water injection drilling sealing method. In order to make the object, technical solution and effect of the present invention more clear and clear, the present invention is further described in detail below. . It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
本发明提供了一种多级式煤层注水钻孔封孔***，如图1与图2所示的，随着工作面向前推进，将钻孔注水周期划分为Ⅰ级完整渗流期、Ⅱ级微裂稳流期、Ⅲ级破碎激流期，进而划分为Ⅰ级完整渗流期单元、Ⅱ级微裂稳流期单元、Ⅲ级破碎激流期单元，比如可以按照距离进行划分，比如距离工作面100米-200米的区域为Ⅲ级破碎激流期，依次类推，当然也可以根据现场施工情况进行适应性调整。也就是说，随着工作面向前推进，注水钻孔距离工作面由远及近依次经历Ⅰ级完整渗流期单元、Ⅱ级微裂稳流期单元、Ⅲ级破碎激流期单元，同一注水钻孔在不同注水时期内通过增加或减少多级式煤层注水钻孔封孔器的串联级数，实现煤层注水钻孔的动态差异封孔。也就是说随着工作面的逐步推进，如图1所示的，根据距离，煤体内会同时存在Ⅰ级完整渗流期单元、Ⅱ级微裂稳流期单元、Ⅲ级破碎激流期单元，但随着工作面的持续推进，原来的Ⅲ级破碎激流期单元会被开采完毕，而原来的Ⅰ级完整渗流期单元会逐步转变为Ⅱ级微裂稳流期单元，最后转变为Ⅲ级破碎激流期单元，最终被开完完毕。The invention provides a multi-stage coal seam water injection drilling and sealing system, as shown in Fig. 1 and Fig. 2, the drilling water injection period is divided into a Class I complete seepage period and a Class II micro as the work faces forward. The fission steady flow period and the third-stage fracture torrent period are further divided into a Class I complete seepage period unit, a Class II microcracking steady flow unit, and a Class III broken torrent unit. For example, it can be divided according to distance, such as 100 meters from the working surface. - The area of 200 meters is the class III crushing torrent, and so on, of course, it can also be adapted according to the site construction conditions. That is to say, with the work facing forward, the water injection drilling distance from the working surface from the far side and the near side through the I-class complete seepage period unit, the second-stage micro-cracking steady flow unit, the third-stage broken torrent period unit, the same water injection hole The dynamic difference sealing of coal seam water injection drilling holes is realized by increasing or decreasing the series number of multi-stage coal seam water injection drilling and sealing devices in different water injection periods. That is to say, with the gradual advancement of the working surface, as shown in Figure 1, according to the distance, there will be a Class I complete seepage period unit, a Class II micro-cracking steady flow unit, and a Class III broken torrent unit at the same time, but With the continuous advancement of the working face, the original Class III broken torrent unit will be mined, and the original Class I complete seepage unit will gradually transform into a Class II microcracking steady flow unit, and finally into a Class III broken torrent. The unit is finally finished.
本发明的多级式煤层注水钻孔封孔器包括由前至后顺次串接的出流装置、水力膨胀封孔装置、紧固装置及自动截止装置。如图2所示的，四部分装置依次通过螺纹串联连接，自动截止装置与井下的注水管路9相接，注水管路9为多级式煤层注水钻孔封孔器供水，供水机构包括井下水管1，井下水管1通过连接管3与储水箱2相连接，储水箱2通过相应管路与注水泵4相连接，注水泵4通过三通件8与注水管路9相连连接，相应管路上设置有流量表5与压力表6，三通件8通过对应管路与一单向截止阀7相连接，该单向截止阀7与储水箱2相连通，当注水管路9中的水压过大时通过单向截止阀7回流至储水箱2内。通过井下水管1、储水箱2、连接管3、注水泵4、流量表5、压力表6、单向截止阀7与三通件8实现了煤层高压注水以及注水参数的监测工作。The multi-stage coal seam water injection drilling hole sealer of the invention comprises an outflow device, a hydraulic expansion sealing device, a fastening device and an automatic cut-off device which are sequentially connected in series from front to back. As shown in Fig. 2, the four-part device is connected in series by threads, and the automatic shut-off device is connected with the water injection pipe 9 in the underground. The water injection pipe 9 supplies water to the multi-stage coal seam water injection drilling and sealing device, and the water supply mechanism includes underground The water pipe 1, the downhole water pipe 1 is connected to the water storage tank 2 through the connecting pipe 3, and the water storage tank 2 is connected to the water injection pump 4 through a corresponding pipeline, and the water injection pump 4 is connected to the water injection pipeline 9 through the three-way member 8, and the corresponding pipeline The flow meter 5 and the pressure gauge 6 are disposed, and the three-way member 8 is connected to a one-way shut-off valve 7 through a corresponding pipeline, and the one-way shutoff valve 7 communicates with the water storage tank 2, and the water pressure in the water injection pipeline 9 When it is too large, it flows back into the water storage tank 2 through the one-way shutoff valve 7. Through the underground water pipe 1, the water storage tank 2, the connecting pipe 3, the water injection pump 4, the flow meter 5, the pressure gauge 6, the one-way stop valve 7 and the three-way member 8, the high-pressure water injection of the coal seam and the monitoring of the water injection parameters are realized.
本发明中的多级式煤层注水钻孔封孔器之出流装置包括调压接头14，调压接头14内穿入调压弹簧15，调压弹簧15的末端设置截止阀16，调压弹簧15一端直径大于调压接头14的出流口直径，另一端与截止阀16相匹配。调压接头14与水力膨胀封孔装置呈连通串接，截止阀16一端为圆柱定位端，该圆柱定位端穿入调压弹簧15，截止阀16的另一端为锥形阀芯，该锥形阀芯的锥顶抵靠在内螺纹接头17的台阶口上。The outflow device of the multi-stage coal seam water injection drilling and sealing device of the invention comprises a pressure regulating joint 14, and the pressure regulating joint 14 is inserted into the pressure regulating spring 15, and the end of the pressure regulating spring 15 is provided with a shut-off valve 16, a pressure regulating spring The diameter of one end of 15 is larger than the diameter of the outlet of the pressure regulating joint 14, and the other end is matched with the shutoff valve 16. The pressure regulating joint 14 is connected in series with the hydraulic expansion sealing device. One end of the shutoff valve 16 is a cylindrical positioning end, the cylindrical positioning end penetrates the pressure regulating spring 15, and the other end of the shutoff valve 16 is a conical valve core. The cone top of the spool abuts against the stepped end of the female threaded joint 17.
通过调压接头14与水力膨胀封孔装置的内螺纹接头17进行螺纹连接，利用调节螺纹旋拧的长度控制调压弹簧15的弹性势能，进而达到调节出水压力的大小，实现水力膨胀封孔装置的不同膨胀程度，满足不同直径钻孔的封孔需求。The pressure regulating joint 14 is screwed with the female threaded joint 17 of the hydraulic expansion sealing device, and the elastic potential energy of the pressure regulating spring 15 is controlled by adjusting the length of the screwing screw, thereby adjusting the pressure of the water outlet to realize the hydraulic expansion sealing device. Different degrees of expansion to meet the sealing requirements of different diameter drill holes.
水力膨胀封孔装置包括多节由内螺纹接头17串接的膨胀钢丝胶管18，该水力膨胀封孔装置通过内螺纹接头17、外螺纹接头19的配合连接方式，实现了多节封孔器的串联组合使用，而位于两端的膨胀钢丝胶管18还通过内螺纹接头17、外螺纹接头19串接其它装置。膨胀钢丝胶管18前端头的内螺纹接头17与调压接头14形成螺纹装配，膨胀钢丝胶管18后端头的外螺纹接头19与紧固装置的紧固内管20形成螺纹装配。紧固内管20***依次交替设有两组膨胀胶塞21与支撑套管22，末尾的支撑套管22外侧设有紧固螺母23，紧固螺母23通过紧固内管20端头的螺纹进行旋进操作，由此通过紧固螺母23的机械挤压作用使膨胀胶塞21膨胀变形，紧固螺母23的旋进程度控制膨胀胶塞21的膨胀程度，以满足不同直径钻孔的机械封孔要求。The hydraulic expansion sealing device comprises a plurality of expanded steel hoses 18 connected in series by the female threaded joints 17, and the hydraulic expansion sealing device realizes the multi-section sealing device by the joint connection manner of the female threaded joints 17 and the externally threaded joints 19 The series use of the expanded steel hose 18 at both ends is also connected in series to other devices through the female joint 17 and the male joint 19. The female threaded joint 17 of the front end of the expanded steel hose hose 18 is threadedly assembled with the pressure regulating joint 14, and the male threaded joint 19 of the rear end of the expanded steel hose hose 18 is threadedly assembled with the fastening inner tube 20 of the fastening device. Two sets of expansion rubber plugs 21 and support sleeves 22 are alternately arranged in the outer periphery of the fastening inner tube 20, and a fastening nut 23 is arranged outside the end support sleeve 22, and the fastening nut 23 passes through the thread of the end of the inner tube 20. The screwing operation is performed, whereby the expansion rubber plug 21 is expanded and deformed by the mechanical pressing action of the fastening nut 23, and the degree of rotation of the fastening nut 23 controls the degree of expansion of the expansion rubber plug 21 to meet the mechanical drilling of different diameters. Sealing requirements.
自动截止装置包括截止阀体24，截止阀体24的前端与紧固内管20的后端形成螺纹装配，截止阀体24的外端设置快速接头29。截止阀体24内设置截止弹簧25与截止阀芯26，具体为截止阀体24内具有通流室，截止弹簧25设置在通流室中，截止阀芯26的一端穿入截止弹簧25，另一端弹性顶靠在通流室的进口上。截止阀芯26以球面状设计，且其投影面积大于截止弹簧25端面积与通道断面面积。截止阀体24上还开设泄流口27，泄流口27上设置泄 流开关28，通过泄流口27及泄流开关28实现了封孔器的卸压循环利用。The automatic shutoff device includes a shutoff valve body 24, the front end of the shutoff valve body 24 is threadedly fitted with the rear end of the fastening inner tube 20, and the outer end of the shutoff valve body 24 is provided with a quick joint 29. A cut-off spring 25 and a shut-off valve core 26 are disposed in the shut-off valve body 24, specifically, the flow-closing chamber is provided in the shut-off valve body 24, the cut-off spring 25 is disposed in the flow-through chamber, and one end of the shut-off valve core 26 penetrates the cut-off spring 25, and One end is resiliently abutted against the inlet of the throughflow chamber. The cut-off spool 26 is designed in a spherical shape, and its projected area is larger than the end area of the cut-off spring 25 and the cross-sectional area of the passage. A drain port 27 is also formed in the shutoff valve body 24. A drain switch 28 is disposed on the drain port 27, and the pressure relief port of the plug sealer is realized through the drain port 27 and the drain switch 28.
本发明多级式煤层注水钻孔封孔***的装配过程与使用方法为：将截止阀16的圆柱定位端置于调压弹簧15内，再将其整体置于调压接头14中，使截止阀16的锥形阀芯向上，将调压接头14通过螺纹装配与水力膨胀封孔装置的内螺纹接头17相连接，并顺次通过外螺纹接头19串接紧固装置的紧固内管20，紧固内管20***依次交替设有两组膨胀胶塞21与支撑套管22，外端的支撑套管22外侧设有紧固螺母23，紧固内管20后端设有一定距离的外螺纹，紧固螺母23可在该段外螺纹上调节旋进位置，紧固内管20的末端与自动截止装置的截止阀体24通过螺纹相连，截止弹簧25与截止阀芯26依次位于截止阀体24内，通过自动截止装置的快速接头29与井下注水管路9相连，完成1级煤层注水钻孔封孔器装配。通过内螺纹接头17与外螺纹接头19的配合串接两节水力膨胀封孔装置，重复上述出流装置、水力膨胀封孔装置、紧固装置及自动截止装置的装配步骤，完成2级煤层注水钻孔封孔器装配。同理，通过内螺纹接头17与外螺纹接头19的配合串接多节水力膨胀封孔装置，重复上述装配步骤，完成多级煤层注水钻孔封孔器装配。The assembly process and the use method of the multi-stage coal seam water injection drilling and sealing system of the present invention are as follows: the cylindrical positioning end of the shut-off valve 16 is placed in the pressure regulating spring 15, and then the whole is placed in the pressure regulating joint 14 to make the cutoff The conical spool of the valve 16 is upwardly connected to the internally threaded joint 17 of the hydraulic expansion sealing device by screw fitting, and sequentially passed through the externally threaded joint 19 to the fastening inner tube 20 of the fastening device. The two sets of expansion rubber plugs 21 and the support sleeve 22 are alternately arranged in the outer periphery of the fastening inner tube 20, and the outer side of the support sleeve 22 is provided with a fastening nut 23 outside, and the rear end of the inner tube 20 is fixed at a certain distance. Thread, the fastening nut 23 can adjust the screwing position on the external thread of the section, the end of the fastening inner tube 20 is threadedly connected with the shut-off valve body 24 of the automatic cut-off device, and the cut-off spring 25 and the cut-off spool 26 are sequentially located at the shut-off valve In the body 24, the quick joint 29 of the automatic shut-off device is connected to the downhole water injection pipe 9 to complete the assembly of the first-stage coal seam water injection drilling sealer. The two-stage hydraulic expansion sealing device is connected in series by the internal threaded joint 17 and the externally threaded joint 19, and the assembly steps of the above-mentioned outflow device, hydraulic expansion sealing device, fastening device and automatic cut-off device are repeated to complete the second-order coal seam Water injection drilling sealer assembly. Similarly, the multi-section hydraulic expansion sealing device is connected through the cooperation of the female threaded joint 17 and the male threaded joint 19, and the above assembly steps are repeated to complete the multi-stage coal seam water injection drilling and sealing device assembly.
为了更详尽的描述本发明中多级式煤层注水钻孔封孔方法，以同期三个注水钻孔为例，如图1所示，以下具体描述其工作过程：In order to describe in more detail the multi-stage coal seam water injection drilling and sealing method of the present invention, taking three water injection drilling holes as an example, as shown in FIG. 1 , the following describes its working process in detail:
(1)当注水钻孔10距离工作面较远，未受工作面采动应力影响，钻孔周围煤壁较为完整，处于Ⅰ级完整渗流期，也就是Ⅰ级完整渗流期单元，该时期所需封孔长度较短，采用1-3级煤层注水钻孔封孔器作为Ⅰ级完整渗流期单元的封孔段11进行封孔工作。取1-3级煤层注水钻孔封孔器，旋进一定程度的调压接头14，使得膨胀钢丝胶管18有足够的水压满足膨胀直径需求，将串连完毕的封孔器置于煤层中对应的注水钻孔10中，利用扳手旋进紧固装置的紧固螺母23，促使膨胀胶塞21膨胀，使得多级式煤层注水钻孔封孔器紧固于注水钻孔内部；关闭泄流开关28，将井下的注水管路9与快速接头29相连，进行水力膨胀封孔以及煤层注水工作。(1) When the water injection hole 10 is far away from the working surface and is not affected by the mining surface stress, the coal wall around the borehole is relatively complete and is in the Class I complete seepage period, which is the Class I complete seepage period unit. The length of the sealing hole is short, and the sealing hole of the 1-3 grade coal seam water injection drilling and sealing device is used as the sealing section 11 of the I-stage complete seepage period unit for sealing work. Take 1-3 grade coal seam water injection drilling sealer, screw into a certain degree of pressure regulating joint 14, so that the expanded steel hose 18 has sufficient water pressure to meet the expansion diameter demand, and the serially sealed sealer is placed in the coal seam. In the corresponding water injection hole 10, the fastening nut 23 of the fastening device is screwed by a wrench to promote the expansion of the expansion rubber plug 21, so that the multi-stage coal seam water injection hole sealing device is fastened inside the water injection hole; The switch 28 connects the downhole water injection pipe 9 with the quick joint 29 to perform hydraulic expansion sealing and coal seam water injection work.
(2)随着工作面的推进，注水钻孔10与工作面的距离不断缩短，钻孔进入采动应力影响范围，其周围煤壁局部开始损伤破裂，注水钻孔亦进入Ⅱ级微裂稳流期，也就是Ⅰ级完整渗流期单元变换为Ⅱ级微裂稳流期单元，该时期所需封孔长度相应增加，应采用增加煤层注水钻孔封孔器串联级数，使其达到4-6级，作为Ⅱ级微裂稳流期单元的封孔段12进行封孔工作。首先将注水管路9与快速接头29分离，自动截止装置防止钻孔中压力水的反出，紧固装置防止封孔器被钻孔内部压力水抛出，实现注水工作的安全化。待钻孔注入水分充分润湿煤体抑或停止煤层注水工作后，打开泄流开关28，将对应注水钻孔10中剩余压力水排出，而后旋转紧固螺母23使得膨胀胶塞21恢复原状，取出封孔器，将其从紧固装置与水力膨胀封 孔装置处分离，利用内螺纹接头17、外螺纹接头19的螺纹配合，适当增加多级煤层注水钻孔封孔器的串联级数，以满足封孔长度的需求，然后将紧固装置与水力膨胀封孔装置正常装配，将多级煤层注水钻孔封孔器置于对应注水钻孔10中，利用扳手旋进紧固装置的紧固螺母23，促使膨胀胶塞21膨胀，使得多级煤层注水钻孔封孔器紧固于对应注水钻孔10内部；关闭泄流开关28，将井下的注水管路9与快速接头29相连，进行水力膨胀封孔以及煤层注水工作。(2) With the advancement of the working face, the distance between the water injection hole 10 and the working surface is shortened, the drilling hole enters the influence range of the mining stress, and the surrounding coal wall begins to damage and rupture, and the water injection hole also enters the class II micro-cracking. The flow period, that is, the I-stage complete seepage period unit is transformed into the second-stage micro-cracking steady-flow period unit. The required sealing length is increased correspondingly during this period, and the series number of the coal seam water-filled hole sealer should be increased to reach 4 Level -6, the sealing section 12 is used as the sealing section 12 of the class II microcracking steady flow period unit. First, the water injection pipe 9 is separated from the quick joint 29, and the automatic shut-off device prevents the reverse pressure of the water in the borehole, and the fastening device prevents the sealer from being thrown out by the internal pressure water of the borehole, thereby realizing the safety of the water injection work. After the drilling hole is filled with water to fully wet the coal body or stop the coal layer water injection work, the drain switch 28 is opened, the remaining pressure water in the corresponding water injection hole 10 is discharged, and then the tightening nut 23 is rotated to restore the expansion rubber plug 21 to the original state, and taken out. The hole sealer is separated from the fastening device and the hydraulic expansion sealing device, and the threaded fitting of the female threaded joint 17 and the male threaded joint 19 is used to appropriately increase the series number of the multi-stage coal seam water injection drilling and sealing device, To meet the requirements of the length of the sealing hole, the fastening device and the hydraulic expansion sealing device are normally assembled, and the multi-stage coal seam water injection drilling and sealing device is placed in the corresponding water injection hole 10, and the fastening device is screwed into the fastening device. The nut 23 causes the expansion rubber plug 21 to expand, so that the multi-stage coal seam water injection hole sealer is fastened inside the corresponding water injection hole 10; the drain switch 28 is closed, and the underground water injection pipe 9 is connected with the quick joint 29 for performing Hydraulic expansion sealing and coal seam water injection work.
(3)随着工作面的进一步推进，注水钻孔10与工作面的距离进一步缩短，钻孔进入采动应力作用区，其周围煤壁受压破裂导通情况较为突出，注水钻孔亦进入Ⅲ级破碎激流期，也就是Ⅱ级微裂稳流期单元变换为Ⅲ级破碎激流期单元，该时期所需封孔长度较长，应继续增加长钻孔煤层注水用封孔器串联级数，使其达到7-10级，作为Ⅲ级破碎激流期单元的封孔段13进行封孔工作。重复(2)中多级式煤层注水钻孔封孔器拆卸、增加水力膨胀封孔装置串联级数、装配过程步骤，进行注水钻孔10的Ⅲ级破碎激流期的注水工作，直至注水钻孔10完成注水工作，打开泄流开关28，将钻孔中剩余压力水排出，而后旋转紧固螺母23使得膨胀胶塞21恢复原状，取出封孔器，以待循环利用。(3) With the further advancement of the working face, the distance between the water injection hole 10 and the working surface is further shortened, and the drilling hole enters the mining stress action zone, and the surrounding coal wall is under pressure and rupture conduction, and the water injection drilling hole also enters. The third-stage crushing torrent period, that is, the class II micro-cracking steady-flow period unit is transformed into the class III-breaking torrent unit, and the length of the sealing hole required for this period is long, and the series of series of sealing units for water injection for long-hole coal seams should be continued. It is made to reach the 7-10 level, and the sealing section 13 as the class III crushing torrent unit performs the sealing operation. Repeat (2) multi-stage coal seam water injection drilling hole sealer disassembly, increase hydraulic expansion and sealing device series series, assembly process steps, water injection work of III grade crushing torrent during water injection drilling 10, until water injection drilling 10 After the water injection work is completed, the drain switch 28 is opened, the remaining pressure water in the borehole is discharged, and then the tightening nut 23 is rotated to restore the expansion rubber plug 21 to its original shape, and the sealer is taken out for recycling.
当然，以上说明仅仅为本发明的较佳实施例，本发明并不限于列举上述实施例，应当说明的是，任何熟悉本领域的技术人员在本说明书的教导下，所做出的所有等同替代、明显变形形式，均落在本说明书的实质范围之内，理应受到本发明的保护。The above description is of course only a preferred embodiment of the present invention, and the present invention is not limited to the above-described embodiments, and all equivalent substitutes made by those skilled in the art under the teachings of the present specification should be explained. The obvious deformation forms are all within the scope of the present specification and are supposed to be protected by the present invention.

Claims (8)

  1. 一种多级式煤层注水钻孔封孔***，其包括供水机构与多级式煤层注水钻孔封孔机构，其特征在于，多级式煤层注水钻孔封孔机构包括Ⅰ级完整渗流期单元、Ⅱ级微裂稳流期单元、Ⅲ级破碎激流期单元，每个单元包括至少一个多级式煤层注水钻孔封孔器，并根据对应单元内煤壁破碎程度对多级式煤层注水钻孔封孔器长度的需求，增加或减少多级式煤层注水钻孔封孔器的串联级数，对煤层注水钻孔进行动态差异封孔。Multi-stage coal seam water injection drilling sealing system, comprising water supply mechanism and multi-stage coal seam water injection drilling sealing mechanism, characterized in that multi-stage coal seam water injection drilling sealing mechanism comprises a class I complete seepage period unit , Class II micro-cracking steady flow unit, and class III crushing torrent unit, each unit includes at least one multi-stage coal seam water injection drilling sealer, and water injection drill for multi-stage coal seam according to the degree of coal wall fracture in the corresponding unit The requirement of the length of the hole sealer increases or decreases the number of series stages of the multi-stage coal seam water injection drilling sealer, and dynamically seals the coal seam water injection hole.
  2. 根据权利要求1所述的多级式煤层注水钻孔封孔***，其特征在于，上述多级式煤层注水钻孔封孔器包括由前至后顺次串接的出流装置、水力膨胀封孔装置、紧固装置及自动截止装置，四者依次通过螺纹串联连接，自动截止装置与供水机构的井下煤层的注水管路相连接接。The multi-stage coal seam water injection drilling and sealing system according to claim 1, wherein the multi-stage coal seam water injection drilling hole seal comprises an outflow device and a hydraulic expansion seal which are sequentially connected in series from front to back. The hole device, the fastening device and the automatic cut-off device are connected in series by threads in series, and the automatic cut-off device is connected with the water injection pipe of the underground coal seam of the water supply mechanism.
  3. 根据权利要求2所述的多级式煤层注水钻孔封孔***，其特征在于，上述水力膨胀封孔装置包括多节由接头螺纹串接的膨胀钢丝胶管，且膨胀钢丝胶管的两端通过内螺纹接头或外螺纹接头串接着出流装置和紧固装置，该紧固装置具有紧固内管，紧固内管上交替套接膨胀胶塞和支撑套管，且紧固内管的尾端套接紧固螺母，紧固装置后接自动截止装置。The multi-stage coal seam water injection drilling sealing system according to claim 2, wherein the hydraulic expansion sealing device comprises a plurality of expanded steel hoses connected in series by a joint thread, and both ends of the expanded steel hose pass through The threaded joint or the externally threaded joint is followed by an outflow device and a fastening device, the fastening device having a fastening inner tube, the inner tube is alternately sleeved with the expansion rubber plug and the support sleeve, and the end of the inner tube is fastened Socket the fastening nut, and the fastening device is followed by an automatic shut-off device.
  4. 根据权利要求3所述的多级式煤层注水钻孔封孔***，其特征在于，上述出流装置包括调压接头，该调压接头内穿入调压弹簧，该调压弹簧的末端设置截止阀，截止阀的一端为圆柱定位端，该圆柱定位端穿入上述调压弹簧，截止阀的另一端为锥形阀芯，该锥形阀芯的锥顶抵靠在内螺纹接头的台阶口上，并且膨胀钢丝胶管端头的接头与调压接头形成螺纹装配。The multi-stage coal seam water injection drilling and sealing system according to claim 3, wherein the outflow device comprises a pressure regulating joint, and the pressure regulating joint penetrates into the pressure regulating spring, and the end of the pressure regulating spring is set to be cut off. a valve, one end of the shut-off valve is a cylindrical positioning end, the cylindrical positioning end penetrates the above-mentioned pressure regulating spring, and the other end of the shut-off valve is a conical valve core, and the cone top of the conical valve core abuts against the stepped end of the internal threaded joint And the joint of the expanded steel hose end and the pressure regulating joint form a threaded assembly.
  5. 根据权利要求4所述的多级式煤层注水钻孔封孔***，其特征在于，上述自动截止装置包括截止阀体，该截止阀体的内端与紧固装置形成螺纹装配，截止阀体的外端设置快速接头，该截止阀体内设置截止弹簧与截止阀芯，截止阀芯的一端穿入截止弹簧，另一端弹性顶靠在多级式煤层注水钻孔封孔器之通流室的进口上。The multi-stage coal seam water injection drilling and sealing system according to claim 4, wherein the automatic shut-off device comprises a shut-off valve body, and the inner end of the shut-off valve body forms a screw assembly with the fastening device, and the valve body is closed. The outer end is provided with a quick joint, the cut-off valve body is provided with a cut-off spring and a cut-off valve core, one end of the cut-off valve core is inserted into the cut-off spring, and the other end is elastically abutted against the inlet of the flow-through chamber of the multi-stage coal seam water injection drilling and sealing device. on.
  6. 根据权利要求5所述的多级式煤层注水钻孔封孔***，其特征在于，上述截止阀体上还设置有泄流口，该泄流口上设置泄流开关。The multi-stage coal seam water injection drilling and sealing system according to claim 5, wherein the shut-off valve body is further provided with a drain port, and the drain port is provided with a drain switch.
  7. 根据权利要求1所述的多级式煤层注水钻孔封孔***，上述供水机构包括井下水管，井下水管通过连接管与储水箱相连接，储水箱通过相应管路与注水泵相连接，注水泵通过三通件与注水管路相连连接，相应管路上设置有流量表与压力表，三通件通过对应管路与一单向截止阀相连接，该单向截止阀与储水箱相连通。The multi-stage coal seam water injection drilling and sealing system according to claim 1, wherein the water supply mechanism comprises a downhole water pipe, and the underground water pipe is connected to the water storage tank through a connecting pipe, and the water storage tank is connected with the water injection pump through the corresponding pipeline, the water injection pump The three-way piece is connected with the water injection pipeline, and the flow meter and the pressure gauge are arranged on the corresponding pipeline, and the three-way component is connected with a one-way stop valve through the corresponding pipeline, and the one-way shutoff valve is connected with the water storage tank.
  8. 一种带有如权利要求1所述多级式煤层注水钻孔封孔***的多级式煤层注水钻孔封孔方法，其包括以下步骤：A multi-stage coal seam water injection drilling and sealing method with a multi-stage coal seam water injection drilling and sealing system according to claim 1, comprising the following steps:
    A、采用1-3级煤层注水钻孔封孔器对Ⅰ级完整渗流期单元进行封孔，取相应的多级式煤层注水钻孔封孔器进行布置，使得膨胀钢丝胶管有足够的水压满足膨胀直径需求，将串连完 毕的多级式煤层注水钻孔封孔器置于煤层注水孔中，使膨胀胶塞膨胀，将多级式煤层注水钻孔封孔器紧固于注水钻孔内部；关闭泄流开关，将井下注水管路与快速接头相连接，进行水力膨胀封孔以及煤层注水工作；A. The 1-3 grade coal seam water injection drilling and sealing device is used to seal the I-stage complete seepage period unit, and the corresponding multi-stage coal seam water injection drilling and sealing device is arranged to make the expansion steel hose have sufficient water pressure. To meet the expansion diameter requirement, the multi-stage coal seam water injection drilling and sealing device connected in series is placed in the coal seam water injection hole to expand the expansion rubber plug, and the multi-stage coal seam water injection drilling and sealing device is fastened to the water injection hole. Internal; close the drain switch, connect the downhole water injection pipeline with the quick joint, perform hydraulic expansion and sealing, and coal seam water injection;
    B、随着工作面的推进，Ⅰ级完整渗流期单元内的注水钻孔与工作面的距离不断缩短，注水钻孔进入Ⅱ级微裂稳流期单元，使用4-6级煤层注水钻孔封孔器对Ⅱ级微裂稳流期单元进行封孔，将Ⅰ级完整渗流期单元内的注水管路与快速接头分离，待Ⅰ级完整渗流期单元内的注水钻孔注入水分充分润湿煤体抑或停止煤层注水工作后，打开泄流开关，将钻孔中剩余压力水排出，而后使得膨胀胶塞恢复原状，取出Ⅰ级完整渗流期单元内的1-3级煤层注水钻孔封孔器并加长至4-6级煤层注水钻孔封孔器，将4-6级煤层注水钻孔封孔器置于Ⅱ级微裂稳流期单元的注水钻孔中，利用扳手旋进紧固装置的紧固螺母，促使膨胀胶塞膨胀，使得封孔器紧固于注水钻孔内部；使膨胀胶塞膨胀，将多级式煤层注水钻孔封孔器紧固于注水钻孔内部；关闭泄流开关，将井下注水管路与快速接头相连接，进行水力膨胀封孔以及煤层注水工作。B. With the advancement of the working face, the distance between the water injection borehole and the working face in the I-stage complete seepage period unit is shortened, and the water injection borehole enters the class II micro-cracking steady flow period unit, and the 4-6 grade coal seam water injection hole is used. The sealing device seals the II-stage micro-cracking steady flow unit, and separates the water injection pipeline and the quick joint in the I-stage complete seepage period unit, and the water injection hole in the I-stage complete seepage period unit is fully wetted by the water injection hole. After the coal body stops or stops the coal seam water injection work, open the drain switch to discharge the remaining pressure water in the borehole, and then return the expansion rubber plug to the original state, and take out the 1-3 grade coal seam water injection hole sealing hole in the I-stage complete seepage period unit. And lengthened to the 4-6 coal seam water injection drilling and sealing device, the 4-6 coal seam water injection drilling and sealing device is placed in the water injection hole of the second-stage micro-cracking steady flow unit, and tightened with a wrench. The fastening nut of the device causes the expansion rubber plug to expand, so that the sealing device is fastened inside the water injection hole; the expansion rubber plug is expanded, and the multi-stage coal seam water injection drilling and sealing device is fastened inside the water injection hole; Drain switch, the underground water injection pipeline and fast The joints are connected, hydraulic expansion and sealing, and coal seam water injection work.
    C、随着工作面的推进，Ⅱ级微裂稳流期单元内的注水钻孔与工作面的距离进一步缩短，使用7-0级煤层注水钻孔封孔器对Ⅲ级破碎激流期单元进行封孔，取出Ⅱ级微裂稳流期单元的4-6级煤层注水钻孔封孔器并加长至7-10级煤层注水钻孔封孔器，重复步骤B中多级式煤层注水钻孔封孔器拆卸、增加水力膨胀封孔装置串联级数、装配过程步骤，关闭泄流开关，将井下注水管路与快速接头相连接，进行水力膨胀封孔以及煤层注水工作；C. With the advancement of the working face, the distance between the water injection borehole and the working face in the Class II micro-cracking steady flow unit is further shortened, and the Class III crushing torrent unit is used by using the 7-0 coal seam water injection drilling sealer. Sealing, take out the 4-6 coal seam water injection drilling sealer of the II grade micro-cracking steady flow unit and lengthen it to the 7-10 coal seam water injection drilling sealer, repeat the multi-stage coal seam water injection drilling in step B The sealing device is disassembled, the number of series of hydraulic expansion and sealing devices is increased, the assembly process steps are closed, the discharge switch is closed, the underground water injection pipe is connected with the quick joint, and the hydraulic expansion sealing and the coal seam water injection work are performed;
    如此反复操作直至煤层开采完毕。This operation is repeated until the coal seam is completed.
PCT/CN2018/100392 2018-04-25 2018-08-14 Multi-stage coal seam water injection borehole packing system and water injection borehole packing method WO2019205355A1 (en)

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CN112879073B (en) * 2021-03-22 2024-01-26 北京天玛智控科技股份有限公司 Water injection method for exploiting coal seam or rock stratum in underground coal mine
CN113914856A (en) * 2021-09-26 2022-01-11 北京天玛智控科技股份有限公司 Coal seam water injection device

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