CN111677550A - Water prevention and control protection method for safe tunneling of rock roadway through water-rich coal seam section - Google Patents
Water prevention and control protection method for safe tunneling of rock roadway through water-rich coal seam section Download PDFInfo
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- CN111677550A CN111677550A CN202010561526.2A CN202010561526A CN111677550A CN 111677550 A CN111677550 A CN 111677550A CN 202010561526 A CN202010561526 A CN 202010561526A CN 111677550 A CN111677550 A CN 111677550A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000003245 coal Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 title claims abstract description 21
- 230000005641 tunneling Effects 0.000 title claims abstract description 17
- 230000002265 prevention Effects 0.000 title claims abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 7
- 239000003657 drainage water Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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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
- E21F16/00—Drainage
-
- 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a water prevention and control protection method for safe tunneling of a rock roadway through a water-rich coal seam section, which comprises the following steps: s1: draining water; s2: and (5) grouting and water plugging. The method adopts a method of combining drilling and grouting, the water-rich coal seam is detected by constructing drilling holes before the water-rich coal seam section is tunneled by aiming at the underground rock roadway, and the grouting engineering is used for reconstructing and plugging the roadway through the water-rich coal seam section on the premise that the drilling engineering determines whether the coal seam is water-rich or not due to the fact that the water-rich property of the coal seam is not uniform, so that a small-range curtain ring is formed, a tunneling area is separated from the water-rich coal seam, and the safe tunneling of the shaft is ensured.
Description
Technical Field
The invention belongs to the technical field of rock roadway construction, and particularly relates to a water prevention and control protection method for safe tunneling of a rock roadway through a water-rich coal seam section.
Background
During the well construction process of the underground mine, the roadway driving may be influenced by a water-rich aquifer. In the northwest elm area of Jurassic coal field in Erdos basin in China, in recent years, a water-rich coal seam is found, and in the process of tunneling a rock roadway, partial sections need to pass through the water-rich coal seam, so that the problem of water damage of the coal seam is brought. Because the mine is in the capital construction stage, underground and ground drainage facilities, water treatment systems and the like are not complete, and the problem of a large amount of water output of a large amount of tunneling working faces cannot be solved, related work such as advanced exploration, coal seam water seal blocking and the like must be carried out in advance before a rock roadway tunnels to a water-rich coal seam section, and safe production is ensured.
Disclosure of Invention
The invention aims to provide a water prevention and control protection method for safely tunneling a rock roadway through a water-rich coal seam section so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a rock gangway is through prevention and cure water protection method of rich water coal seam section safety tunnelling which structural feature lies in: the method comprises the following steps:
s1: draining water;
s2: and (5) grouting and water plugging.
Preferably, the step of draining water at S1 includes the following steps:
s11: constructing 1 circle of water drainage drill holes around the coal uncovering point of the roadway, and forming a dropping funnel in the area of the coal uncovering point in a group hole drainage mode to enable the whole pipeline to be positioned at the center of the dropping funnel;
s12: when the water level of the central hole of the drainage water drops to 0.17MPa, the total water inflow of the peripheral drill holes of the pipe is not more than 30m3/h, the roadway can start to dig, and the drainage water drill holes are continuously drained in the process that the whole roadway digs through the coal bed, so that the effect of intercepting, shielding and digging is achieved.
Preferably, the concrete steps of the step of S2 grouting and water plugging include:
s21: determining the reasonable thickness of the waterproof and waterproof coal rock pillar and the length of the water-stopping casing pipe, and preparing the specific surface area of the waterproof and waterproof coal rock pillar to be more than 600m2The high-performance cement-based grouting material per gram is used for building a grouting system;
s22: according to the design parameter requirements of the grouting holes, the grouting holes are drilled in the bedrock of the No. 2 coal bedplate to be exposed, a 21m long orifice pipe is put into the grouting holes, a pressure resistance test is carried out, and drilling can be carried out after the requirements are met;
s23: during the drilling process of the grouting hole, the water inflow of the drilling hole is more than 30m3Stopping drilling immediately, adopting grouting material to perform grouting plugging reconstruction on coal seam pores and cracks, stopping grouting after grouting pressure reaches a design value, and sweeping the hole to continue drilling after 24 hours of coagulation, wherein water quantity is more than 30m3Stopping drilling again, and continuing grouting and plugging; repeating the steps until the designed hole depth of the drill hole is reached;
s24: after the full-hole grouting pressure reaches the design requirement, the grouting transformation area construction inspection hole is comprehensively analyzed for grouting effect through single-hole water pressure test, water yield and the difference between the internal water pressure and the external water pressure of the grouting ring, and the grouting is supplemented through the inspection hole when the requirement is not met.
Compared with the prior art, the method of combining drilling and grouting is adopted, the water-rich coal seam is explored through the construction drilling hole before the water-rich coal seam section is tunneled by aiming at the underground rock tunnel, and the tunnel is transformed and plugged through the water-rich coal seam section through the grouting engineering on the premise that the drilling engineering determines whether the coal seam is water-rich due to uneven water-rich property of the coal seam, so that a small-range curtain ring is formed, the tunneling area is separated from the water-rich coal seam, and the safe tunneling of a shaft is ensured.
Drawings
FIG. 1 is a plan view of the arrangement of the water drainage drill holes for roadway excavation according to the present invention;
FIG. 2 is a sectional view showing the arrangement of water drainage drill holes in the roadway;
FIG. 3 is a layout of drill site borehole openings of the present invention;
FIG. 4 is a schematic view of a grouting water plugging system of the present invention;
FIG. 5 is a flow chart of the drilling grouting process of the present invention;
FIG. 6 is a schematic cross-sectional view illustrating the grouting effect of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-6, the present invention provides a technical solution, a method for protecting water prevention and control in a rock roadway by safe tunneling of a water-rich coal seam section, comprising:
s1: draining water;
s2: and (5) grouting and water plugging.
The purpose of the advanced drainage is to drain coal bed water in the roadway excavation influence range, so that a descending funnel is formed in the roadway excavation area, and the influence of No. 2 coal bed water damage on roadway excavation is reduced; the general idea of the scheme of leading the drainage is 'group hole drainage and shield tunneling'. The specific steps of the step of S1 water drainage include:
s11: constructing 1 circle of water drainage drill holes around the coal uncovering point of the roadway, and forming a dropping funnel in the area of the coal uncovering point in a group hole drainage mode to enable the whole pipeline to be positioned at the center of the dropping funnel;
s12: when the water level of the central hole of the drainage water drops to 0.17MPa, the total water inflow of the peripheral drill holes of the pipe is not more than 30m3/h, the roadway can start to dig, and the drainage water drill holes are continuously drained in the process that the whole roadway digs through the coal bed, so that the effect of intercepting, shielding and digging is achieved.
The goal of group hole drainage is to ensure that the water inrush quantity is not more than 30m in the process of the pipe passing No. 2 coal3H is used as the reference value. If the attenuation of the water discharge drill hole is not obvious or the water quantity is more than 30m3And h, grouting and plugging.
The concrete steps of the S2 grouting water shutoff step comprise:
s21: determining the reasonable thickness of the waterproof and waterproof coal rock pillar and the length of the water stop sleeve according to coal mine prevention and control water regulations and No. 2 coal hydrogeology conditions, and preparing the water stop sleeve with the specific surface area of more than 600m2The high-performance cement-based grouting material per gram is used for building a grouting system;
s22: according to the design parameter requirements of the grouting holes, the grouting holes are drilled in the bedrock of the No. 2 coal bedplate to be exposed, a 21m long orifice pipe is put into the grouting holes, a pressure resistance test is carried out, and drilling can be carried out after the requirements are met;
s23: during the drilling process of the grouting hole, the water inflow of the drilling hole is more than 30m3Stopping drilling immediately, adopting grouting material to perform grouting plugging reconstruction on coal seam pores and cracks, stopping grouting after grouting pressure reaches a design value, and sweeping the hole to continue drilling after 24 hours of coagulation, wherein water quantity is more than 30m3Stopping drilling again, and continuing grouting and plugging; repeating the steps until the designed hole depth of the drill hole is reached;
s24: after the full-hole grouting pressure reaches the design requirement, the grouting transformation area construction inspection hole is comprehensively analyzed for grouting effect through single-hole water pressure test, water yield and the difference between the internal water pressure and the external water pressure of the grouting ring, and the grouting is supplemented through the inspection hole when the requirement is not met.
And advanced exploration and water drainage drilling reservation are carried out and are used as post grouting water plugging drilling.
The method is applied to the water engineering for preventing and controlling the bravain coal mine shaft bottom yard pipeline in the Ultrazone in the Jurassic period of Shanxi province in China, and obtains good application effect. By the related drilling and grouting method, the grouting plugging engineering that rock tunnels in the area tunnel and pass through the water-rich coal seam section is successfully realized for the first time. The total water inflow of the mine after construction of 8 advanced exploration drill holes and 1 inspection hole (No. 5 drill hole) is from the initial 521m3The/h decays to the current 12.87m3And the grouting water plugging rate is 97.5 percent, and the water plugging agent is delivered from the mine water prevention angle, so that the roadway can be ensured to be continuously and safely tunneled.
The mines in the elm cross north area are all self-contained well fields, most of the mines are basically in exploration and construction stages at present, various facilities of unproductive mines are not complete, particularly mine drainage systems, water treatment systems and the like, the environment protection situation in China is severe at present, the mineralization degree of mine water and deep underground water is high, the drainage faces a large penalty, but the coal seam of the mine needs to be drained when the coal seam is rich in water, therefore, the grouting method provided by the invention is adopted to prevent and control the water hazard of the coal seam, the problem that the infrastructure mines in the area need to prevent and control water through a roadway of the coal seam section can be solved, the mine enters the production stage after various facilities of the mine are complete, the requirements of a large amount of drainage of underground water, treatment of the mine water and the like can be met, and the long-term drainage of the water hazard of the coal seam can be carried out.
The method and the technology can be applied to advanced exploration and treatment of roadways, the traditional freezing method construction is only used for shaft tunneling, the economic investment is large, the economic investment is relatively small, the construction period is short, and the time requirement of accelerating the infrastructure construction of mines is facilitated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. A water prevention and control protection method for safe tunneling of a rock roadway through a water-rich coal seam section is characterized by comprising the following steps: the method comprises the following steps:
s1: draining water;
s2: and (5) grouting and water plugging.
2. The method for protecting water for preventing and controlling the safe tunneling of the rock roadway through the water-rich coal seam section according to claim 1, wherein the method comprises the following steps: the specific steps of the step of S1 draining water include:
s11: constructing 1 circle of water drainage drill holes around the coal uncovering point of the roadway, and forming a dropping funnel in the area of the coal uncovering point in a group hole drainage mode to enable the whole pipeline to be positioned at the center of the dropping funnel;
s12: when the water level of the central hole of the drainage water drops to 0.17MPa, the total water inflow of the peripheral drill holes of the pipe is not more than 30m3/h, the roadway can start to dig, and the drainage water drill holes are continuously drained in the process that the whole roadway digs through the coal bed, so that the effect of intercepting, shielding and digging is achieved.
3. The method for protecting water for preventing and controlling the safe tunneling of the rock roadway through the water-rich coal seam section according to claim 1, wherein the method comprises the following steps: the concrete steps of the S2 grouting water shutoff step comprise:
s21: determining the reasonable thickness of the waterproof and waterproof coal rock pillar and the length of the water-stopping casing pipe, and preparing the specific surface area of the waterproof and waterproof coal rock pillar to be more than 600m2The high-performance cement-based grouting material per gram is used for building a grouting system;
s22: according to the design parameter requirements of the grouting holes, the grouting holes are drilled in the bedrock of the No. 2 coal bedplate to be exposed, a 21m long orifice pipe is put into the grouting holes, a pressure resistance test is carried out, and drilling can be carried out after the requirements are met;
s23: during the drilling process of the grouting hole, the water inflow of the drilling hole is more than 30m3Stopping drilling immediately, adopting grouting material to perform grouting plugging reconstruction on coal seam pores and cracks, stopping grouting after grouting pressure reaches a design value, and sweeping the hole to continue drilling after 24 hours of coagulation, wherein water quantity is more than 30m3Stopping drilling again, and continuing grouting and plugging; repeating the steps until the designed hole depth of the drill hole is reached;
s24: after the full-hole grouting pressure reaches the design requirement, the grouting transformation area construction inspection hole is comprehensively analyzed for grouting effect through single-hole water pressure test, water yield and the difference between the internal water pressure and the external water pressure of the grouting ring, and the grouting is supplemented through the inspection hole when the requirement is not met.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530573A (en) * | 2021-08-20 | 2021-10-22 | 湖南楚湘建设工程集团有限公司 | Long-detection-short-detection-grouting combined water prevention and control method based on water inflow classification |
| CN113622962A (en) * | 2021-09-16 | 2021-11-09 | 安徽理工大学 | Grouting method for reinforcing surrounding rock of three-soft mining roadway |
| CN114562331A (en) * | 2022-03-03 | 2022-05-31 | 中煤科工集团西安研究院有限公司 | Method for preventing and controlling old open water of integrated mine from being damaged by small kiln in same thick coal seam |
| CN115324592A (en) * | 2022-07-26 | 2022-11-11 | 陕西延长石油矿业有限责任公司 | Dynamic monitoring and dynamic response control method for aquifer for well construction |
| CN118167416A (en) * | 2024-05-16 | 2024-06-11 | 中煤第五建设有限公司 | Dredging and draining construction method for underground mine general high-pressure water-bearing body |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530573A (en) * | 2021-08-20 | 2021-10-22 | 湖南楚湘建设工程集团有限公司 | Long-detection-short-detection-grouting combined water prevention and control method based on water inflow classification |
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| CN114562331A (en) * | 2022-03-03 | 2022-05-31 | 中煤科工集团西安研究院有限公司 | Method for preventing and controlling old open water of integrated mine from being damaged by small kiln in same thick coal seam |
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| CN115324592A (en) * | 2022-07-26 | 2022-11-11 | 陕西延长石油矿业有限责任公司 | Dynamic monitoring and dynamic response control method for aquifer for well construction |
| CN118167416A (en) * | 2024-05-16 | 2024-06-11 | 中煤第五建设有限公司 | Dredging and draining construction method for underground mine general high-pressure water-bearing body |
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Application publication date: 20200918 |