CN117145569A - Extraction method for implementing hydraulic fracturing drilling in high extraction roadway - Google Patents
Extraction method for implementing hydraulic fracturing drilling in high extraction roadway Download PDFInfo
- Publication number
- CN117145569A CN117145569A CN202311392081.XA CN202311392081A CN117145569A CN 117145569 A CN117145569 A CN 117145569A CN 202311392081 A CN202311392081 A CN 202311392081A CN 117145569 A CN117145569 A CN 117145569A
- Authority
- CN
- China
- Prior art keywords
- roadway
- hydraulic fracturing
- extraction
- pipe
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 63
- 238000000605 extraction Methods 0.000 title claims description 72
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 12
- 238000005065 mining Methods 0.000 claims abstract description 9
- 239000006260 foam Substances 0.000 claims description 16
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 7
- 230000005641 tunneling Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 21
- 241000220317 Rosa Species 0.000 description 17
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 15
- 235000017491 Bambusa tulda Nutrition 0.000 description 15
- 241001330002 Bambuseae Species 0.000 description 15
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 15
- 239000011425 bamboo Substances 0.000 description 15
- 239000012535 impurity Substances 0.000 description 14
- 238000005086 pumping Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 9
- 238000000926 separation method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of coal mine gas control, in particular to a drainage method for implementing hydraulic fracturing drilling in a high drainage roadway, wherein a negative pressure drainage device comprises a filter box, a drainage pipe is fixedly communicated with the bottom of one side of the filter box, a negative pressure pump is fixedly arranged on the filter box, and an air outlet of the negative pressure pump is communicated with a gas storage tank; according to the invention, the low-level high drainage roadway parallel to the return air roadway is arranged above the roof of the coal seam of the stoping working face, the sealing wall is built at the mouth of the low-level high drainage roadway, the plurality of inclined high-level hydraulic fracturing drilling holes are equidistantly arranged at the top of the low-level high drainage roadway, hydraulic fracturing is carried out on the high-level drilling holes, the sieve tube is arranged under the high-level hydraulic fracturing drilling holes, the drainage tube is inserted into the low-level high drainage roadway through the sealing wall, the negative pressure drainage device is adopted for drainage, the gas in the working face goaf is treated by using the inclined high-level hydraulic fracturing drilling holes in the construction of the low-level high drainage roadway, the tunneling engineering quantity and the drilling construction engineering quantity of the roadway are reduced, and the problem of mining and taking over tension is facilitated to be relieved.
Description
Technical Field
The invention relates to the technical field of coal mine gas control, in particular to a drainage method for implementing hydraulic fracturing drilling in a high drainage roadway.
Background
The gas disaster is one of the main problems restricting the safe and efficient production of the coal mine working face. At present, china mainly carries out gas control on a working face through gas extraction, wherein the gas control on a working face goaf mainly comprises the following methods: firstly, arranging high-level and low-level high-drainage roadways in a top plate of a working surface, controlling upper corner gas by changing an upper corner gas flow field through the low-level high-drainage roadway, and extracting high-concentration gas on an adjacent layer through the high-level high-drainage roadway, wherein the method is suitable for all mines, has a good effect, but has more roadway tunneling and is easy to cause mining succession tension; secondly, the working face performs high-level drilling along the gob-side entry retaining and is matched with a high-level drainage roadway or the high-level drilling of the construction of the air return roadway, Y-shaped ventilation is realized on the working face, no upper corner exists, and high-level drilling of the construction of the high-level drainage roadway or the air return roadway is used for extracting high-concentration gas on an adjacent layer, so that the method is suitable for the working face suitable for the gob-side entry retaining; thirdly, a low-level high-drainage roadway is arranged in a top plate of the working face and matched with a high-level drilling hole arranged in a return air roadway, upper corner gas is treated by changing an upper corner gas flow field through the low-level high-drainage roadway, and high-concentration gas on an adjacent layer is extracted through the high-level drilling hole.
In view of the above technical drawbacks, a solution is now proposed.
Disclosure of Invention
The invention aims to provide a drainage method for implementing hydraulic fracturing drilling in a high drainage roadway, which solves the technical defects, and the method has the advantages that the working face goaf gas is treated by utilizing the low-level high drainage roadway construction tendency high-level hydraulic fracturing drilling, the roadway tunneling engineering quantity is reduced, the mining and taking-over tension is relieved, in addition, in the gas drainage process, the recovery and collection of fracturing fluid extracted along with gas are facilitated, and the problem of gas leakage is avoided.
The aim of the invention can be achieved by the following technical scheme:
a pumping method for implementing hydraulic fracturing drilling in a high pumping roadway comprises the following steps:
step one: a low-level high-drainage roadway which is arranged in parallel with the return air roadway is arranged above a roof of the coal seam of the stoping working face, a closed wall is built at a roadway opening of the low-level high-drainage roadway, a plurality of high-level hydraulic fracturing drilling holes which are inclined upwards are equidistantly arranged at the top of the low-level high-drainage roadway along the length direction of the low-level high-drainage roadway, the final hole of each high-level hydraulic fracturing drilling hole is positioned at a height which is 10 times the stoping height of the top of the stoping working face, and all the high-level hydraulic fracturing drilling holes are not sealed;
step two: carrying out hydraulic fracturing on each high-level hydraulic fracturing drilling hole, wherein the hydraulic fracturing section is a hole section with the height 6-10 times of the mining height of the top of the stoping face, and then sieve tubes are arranged in all hole sections of each high-level hydraulic fracturing drilling hole;
step three: inserting the end part of a suction pipe in the negative pressure suction device into a low-position high suction roadway through a sealing wall, so that the suction pipe is communicated with the low-position high suction roadway;
step four: starting a negative pressure pump, wherein the negative pressure pump extracts air in the filter tank through a negative pressure extraction pipe, the air pressure in the filter tank is reduced, a lower high-level extraction roadway is extracted through an extraction pipe to change an upper corner gas flow field, high-level hydraulic fracturing drilling holes are used for intercepting and extracting high-concentration gas of adjacent layers, and the gas entering the filter tank is filtered by a filter screen I and a silk screen foam remover and then enters a gas storage tank through a negative pressure air outlet pipe and an air inlet pipe for storage under the action of the negative pressure pump.
Preferably, the vertical distance between the low-level high-level drainage roadway and the coal seam roof is 7-10 m, and the horizontal distance between the low-level high-level drainage roadway and the return air roadway is 15-20 m.
Preferably, the distance between two adjacent high-level hydraulic fracturing drilling holes is 2 times of the gas extraction radius of the fracture zone.
Preferably, the negative pressure extraction device comprises a filter tank, an extraction pipe is fixedly communicated with the bottom of one side of the filter tank, the free end part of the extraction pipe is inserted into a low-position high extraction roadway through a sealing wall, a negative pressure pump is fixedly mounted on one side, far away from the extraction pipe, of the filter tank through a bolt, a negative pressure extraction pipe is fixedly communicated between an extraction opening of the negative pressure pump and the top of the filter tank, a negative pressure air outlet pipe is fixedly communicated with an air outlet of the negative pressure pump, a connecting pipe is rotationally connected with the free end of the negative pressure air outlet pipe, an air inlet pipe is connected with the free end inner thread of the connecting pipe, and a gas storage tank is fixedly communicated with the free end of the air inlet pipe.
Preferably, the filter screen I and the silk screen foam remover are fixedly connected to the inside of the filter box, the silk screen foam remover is located above the filter screen I, and one end part of the extraction pipe, which is close to the filter box, is located below the filter screen I.
Preferably, the bottom of rose box is provided with the collection tube that the top is open structure, a plurality of connecting holes have been seted up to the top of collection tube relative its axial lead circumference array, the bottom fixedly connected with of rose box with the double-screw bolt of corresponding connecting hole grafting, the collection tube passes through fixation nut on the double-screw bolt and rose box fixed connection, the bottom in the rose box runs through and has seted up the intercommunication mouth that is linked together with the collection tube, be provided with rubber sealing pad between collection tube and the rose box.
Preferably, the bottom of the collecting cylinder is fixedly communicated with a drain pipe, a first valve is fixedly arranged on the drain pipe, and a second filter screen is fixedly connected to the top in the collecting cylinder.
Preferably, one side welding that is close to the intake pipe in the connecting pipe has the fixed plate, sliding connection has the slide bar on the fixed plate, the one end fixedly connected with toper shutoff piece of keeping away from the intake pipe on the slide bar, one side welding that is close to the negative pressure outlet duct in the connecting pipe has the solid fixed ring, one side fixedly connected with that is close to toper shutoff piece on the solid fixed ring and the rubber seal of toper shutoff piece looks adaptation, the cover is equipped with the spring on the slide bar, the both ends of spring respectively with fixed plate and toper shutoff piece fixed connection, one side butt with rubber seal of toper shutoff piece under the compression of spring.
Preferably, a valve II is fixedly arranged on the air inlet pipe, and an air pressure gauge is fixedly arranged between the valve II and the gas storage tank on the air inlet pipe.
The beneficial effects of the invention are as follows:
(1) The invention provides a pumping method for carrying out hydraulic fracturing drilling in a high pumping roadway, which comprises the steps of firstly, opening a low-position high pumping roadway which is arranged in parallel with a return air roadway above a roof of a coal seam of a stoping working face, and building a closed wall at the opening of the low-position high pumping roadway; then, a plurality of inclined high-position hydraulic fracturing drilling holes are equidistantly formed in the top of the low-position high-suction roadway along the length direction of the low-position high-suction roadway; then, carrying out hydraulic fracturing on the high-level drilling holes and placing a screen pipe under the high-level drilling holes, wherein all the high-level drilling holes are not sealed; then, the extraction pipe is inserted into a low-level high extraction roadway through a sealing wall so as to be communicated with the low-level high extraction roadway; and then, in the working face extraction process, the negative pressure extraction device is adopted to extract the low-level high-extraction roadway, so that the low-level high-extraction roadway is changed to change an upper corner gas flow field, and high-level hydraulic fracturing drilling holes are used for intercepting and extracting high-concentration gas of adjacent layers, the tunneling engineering quantity and the drilling construction engineering quantity can be effectively reduced, and the problem of mining and taking over tension is solved.
(2) According to the extraction method for carrying out hydraulic fracturing drilling in the high extraction roadway, provided by the invention, in the process of extracting the low-level high extraction roadway by using the negative pressure extraction device, the fracturing fluid contained in extracted gas can be effectively removed by a silk screen foam remover arranged in the filter box, and the fracturing fluid is collected and recovered by a collecting cylinder at the bottom of the filter box; the first filter screen arranged below the silk screen foam remover realizes the effect of filtering impurities contained in gas, so that the problem that the impurities block the silk screen foam remover is avoided, and the second filter screen arranged in the collecting cylinder realizes the separation of the filtered impurities and fracturing fluid, so that the purity of the recovered fracturing fluid is improved.
(3) According to the extraction method for carrying out hydraulic fracturing drilling in the high drainage roadway, when the air pressure in the gas storage tank reaches the rated air pressure, the negative pressure pump and the valve II are closed, and the air inlet pipe is separated from the connecting pipe to replace the gas storage tank, the external air is higher than the air pressure in the filter box at the moment, so that the external air can easily enter the filter box, the problem that the external air enters the filter box to reduce the concentration of gas in the filter box is effectively avoided through the conical blocking block, the fixing ring and the rubber sealing ring arranged in the connecting pipe, and the problem that the gas in the gas storage tank flows back is effectively avoided through the connecting pipe when the negative pressure pump is damaged and the gas cannot be continuously extracted once the negative pressure pump is damaged.
Drawings
The invention is further described below with reference to the accompanying drawings;
FIG. 1 is a schematic plan view of the positional relationship between a stope face and a low-level high-drainage roadway and a high-level hydraulic fracturing borehole of the present invention;
FIG. 2 is a schematic cross-sectional view of the position relationship between the stope face and the low-level high-drainage roadway and the high-level hydraulic fracturing drilling hole of the invention;
FIG. 3 is a schematic cross-sectional view of a containment wall of the present invention;
FIG. 4 is a schematic diagram of the negative pressure extraction device of the present invention;
FIG. 5 is a schematic cross-sectional view of the filter box of the present invention;
fig. 6 is a schematic view showing the internal structure of the connection pipe of the present invention.
Legend description:
1. stoping the working face; 2. a coal seam; 3. a return airway; 4. a low-level high-level pumping roadway; 5. a sealing wall; 6. high-order hydraulic fracturing drilling; 7. a hydraulic fracturing section; 8. a drainage pipe; 9. a filter box; 10. a negative pressure pump; 11. a negative pressure exhaust pipe; 12. a negative pressure air outlet pipe; 13. a connecting pipe; 14. an air inlet pipe; 15. a gas storage tank; 16. a first filter screen; 17. a wire mesh demister; 18. a collection cylinder; 19. a communication port; 20. a rubber gasket; 21. a drain pipe; 22. a valve I; 23. a second filter screen; 24. a fixing plate; 25. a slide bar; 26. a conical block; 27. a fixing ring; 28. a rubber seal ring; 29. a spring; 30. a second valve; 31. barometer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the problem that fracturing fluid contained in extracted gas is difficult to recover and collect is solved through the following scheme:
referring to fig. 1-5, in this embodiment, the negative pressure extraction device includes a filter box 9, a suction pipe 8 is fixedly connected to the bottom of one side of the filter box 9, the set suction pipe 8 connects the filter box 9 with the low-level high suction roadway 4, the free end of the suction pipe 8 is inserted into the low-level high suction roadway 4 through a sealing wall 5, a negative pressure pump 10 is fixedly mounted on one side of the filter box 9 far away from the suction pipe 8 through a bolt, the negative pressure pump 10 is arranged to realize negative pressure inside the filter box 9 so as to achieve the purpose of extracting gas, a negative pressure suction pipe 11 is fixedly connected between the suction port of the negative pressure pump 10 and the top of the filter box 9, a negative pressure air outlet pipe 12 is fixedly connected to the air outlet of the negative pressure pump 10, a connecting pipe 13 is rotatably connected to the free end of the negative pressure air outlet pipe 12, an air inlet pipe 14 is connected to the free end of the connecting pipe 13 through internal threads, the set connecting pipe 13 is used for connecting the negative pressure air outlet pipe 12 with the air inlet pipe 14, the free end of the air inlet pipe 14 is fixedly connected to a gas storage tank 15, and the set gas storage tank 15 stores the extracted gas.
The inside fixedly connected with filter screen one 16 and silk screen foam remover 17 of rose box 9, and silk screen foam remover 17 is located the top of filter screen one 16, and the one end tip that the extraction pipe 8 is close to rose box 9 is located the below of filter screen one 16, and the fracturing fluid that contains in the gas of extraction can effectively be got rid of to the silk screen foam remover 17 of setting, and the impurity that contains in the gas is filtered to the realization of filter screen one 16 of setting.
The bottom of rose box 9 is provided with the collection section of thick bamboo 18 that the top is open structure, the collection section of thick bamboo 18 that sets up is collected the fracturing fluid of separation, a plurality of connecting holes have been seted up to the circumference array of its axial lead in the top of collection section of thick bamboo 18, the bottom fixedly connected with of rose box 9 and the double-screw bolt of corresponding connecting hole grafting, collection section of thick bamboo 18 passes through the fixation nut on the double-screw bolt and is connected collection section of thick bamboo 18 and rose box 9 through double-screw bolt and fixation nut and is convenient for realize dismantling the separation, thereby better clear up the impurity of collection section of thick bamboo 18 inside, the bottom in the rose box 9 runs through and has offered the intercommunication mouth 19 that is linked together with collection section of thick bamboo 18, be convenient for impurity and fracturing fluid enter into in collection section of thick bamboo 18, be provided with rubber sealing pad 20 between collection section of thick bamboo 18 and the rose box 9, the sealing between collection section of thick bamboo 18 and the rose box 9 is increased to the rubber sealing pad 20 that sets up, thereby improve the negative pressure extraction effect to the gas.
The bottom of the collection tube 18 is fixedly communicated with a drain tube 21, a valve I22 is fixedly arranged on the drain tube 21, the arranged drain tube 21 and the valve I22 realize the discharge of fracturing fluid in the collection tube 18, a filter screen II 23 is fixedly connected to the top in the collection tube 18, and the filter screen II 23 realizes the separation of filtered impurities and the fracturing fluid, so that the purity of the recovered fracturing fluid is improved.
The air inlet pipe 14 is fixedly provided with a valve II 30, the air inlet pipe 14 is fixedly provided with an air pressure meter 31 between the valve II 30 and the gas storage tank 15, and the arranged air pressure meter 31 realizes that the air pressure in the gas storage tank 15 is observed at any time.
The working process and principle of the invention are as follows:
in the extraction process of carrying out hydraulic fracturing drilling in a high drainage lane, a negative pressure extraction device is used for extracting a low-position high drainage lane 4, the end part of an extraction pipe 8 is inserted into the low-position high drainage lane 4 through a sealing wall 5, so that the extraction pipe 8 is communicated with the low-position high drainage lane 4, a negative pressure pump 10 is started, the negative pressure pump 10 extracts air in a filter box 9 through a negative pressure extraction pipe 11, the air pressure in the filter box 9 is reduced, the purpose of changing an upper corner gas flow field and intercepting high-position hydraulic fracturing drilling 6 to extract high-concentration gas of an adjacent layer through the extraction pipe 8 is achieved, the gas entering the filter box 9 is filtered by a filter screen one 16 and a silk screen foam remover 17 and then enters a gas storage tank 15 through a negative pressure air outlet pipe 12 and an air inlet pipe 14 under the action of the negative pressure pump 10 for storage, the filter screen I16 that through setting up carries out filterable effect to the impurity that contains in the gas, avoid impurity to lead to the fact the jam to silk screen foam remover 17, through the fracturing fluid that silk screen foam remover 17 that sets up in rose box 9 can effectively get rid of in the gas of taking out, impurity and the fracturing fluid that separates with gas enter into the collection section of thick bamboo 18 through the intercommunication mouth 19 of rose box 9 bottom and collect, the impurity and the fracturing fluid separation to the filtration have been realized through the filter screen II 23 that sets up in the collection section of thick bamboo 18, thereby improve the purity of retrieving the fracturing fluid, realize the discharge to the fracturing fluid in the collection section of thick bamboo 18 through drain pipe 21 and the first valve 22 that set up, connect the collection section of thick bamboo 18 and rose box 9 through double-screw bolt and fixation nut and realize the dismantlement separation between the two, thereby clear up the impurity at filter screen II 23 top in the collection section of thick bamboo 18.
Embodiment two:
when changing to the gas holding vessel, thereby external air easily enters into the rose box and reduces its inside gas concentration's problem, accessible following scheme solves:
referring to fig. 6, a fixing plate 24 is welded on one side, close to the air inlet pipe 14, of the connecting pipe 13, the fixing plate 24 is used for installing a sliding rod 25, the sliding rod 25 is connected to the fixing plate 24 in a sliding manner, the sliding rod 25 is used for installing a conical block 26, a sealing effect is achieved by matching the conical block 26 with a fixing ring 27 through the matching of the sliding rod 25 and the fixing plate 24, the conical block 26 is fixedly connected to one end, far away from the air inlet pipe 14, of the sliding rod 25, the fixing ring 27 is welded on one side, close to the negative pressure air outlet pipe 12, of the connecting pipe 13, the fixing ring 27 is matched with the conical block 26, a rubber sealing ring 28 matched with the conical block 26 is fixedly connected to one side, close to the conical block 26, of the fixing ring 27 is provided with a sealing effect between the fixing ring 27 and the conical block 26, a spring 29 is sleeved on the sliding rod 25, two ends of the spring 29 are fixedly connected with the fixing plate 24 and the conical block 26 respectively, and one side of the conical block 26 is abutted to one side of the rubber sealing ring 28 under the compression effect of the spring 29.
In this embodiment:
when the air pressure in the gas storage tank 15 reaches the rated air pressure, the negative pressure pump 10 and the valve II 30 are closed, the air inlet pipe 14 is separated from the connecting pipe 13 to replace the gas storage tank 15, the external air is higher than the air pressure in the filter box 9 at the moment, so that the external air can easily enter the filter box 9, the problem that the external air enters the filter box 9 to reduce the concentration of gas in the filter box 9 is effectively avoided through the conical blocking block 26, the fixing ring 27 and the rubber sealing ring 28 which are arranged in the connecting pipe 13, and when the negative pressure pump 10 is damaged and the gas cannot be continuously extracted once the negative pressure pump 10 occurs, the air pressure in the gas storage tank 15 is higher than the air pressure in the filter box 9, and the problem that the gas in the gas storage tank 15 flows back is effectively avoided through the connecting pipe 13.
Embodiment III:
referring to fig. 1-6, a method for extracting hydraulic fracturing drilling holes in a high-speed pumping roadway comprises the following steps:
step one: a low-level high drainage roadway 4 which is arranged in parallel with a return air roadway 3 is arranged above a roof of a coal seam 2 of a stoping working face 1, a sealing wall 5 is built at a roadway opening of the low-level high drainage roadway 4, the sealing wall is used for sealing the roadway opening of the low-level high drainage roadway 4, the vertical distance between the low-level high drainage roadway 4 and the roof of the coal seam 2 is 7-10 m, the horizontal distance between the low-level high drainage roadway 4 and the return air roadway 3 is 15-20 m, a plurality of obliquely upward high-level hydraulic fracturing drilling holes 6 are equidistantly arranged at the top of the low-level high drainage roadway 4 along the length direction of the low-level high-drainage roadway, the inclined high-level hydraulic fracturing drilling holes 6 are arranged so that gas can better enter the high-level hydraulic fracturing drilling holes 6, the distance between two adjacent high-level hydraulic fracturing drilling holes 6 is 2 times the gas drainage radius of a fracture zone, so that the gas drainage effect is improved, the height 10 times the height of the top of the stoping working face 1 is ensured, and the sealing effect of all high-level hydraulic fracturing drilling holes 6 around the stoping working face 1 is ensured;
step two: carrying out hydraulic fracturing on each high-level hydraulic fracturing drilling hole 6, wherein the hydraulic fracturing section 7 is a hole section with the height 6-10 times of the mining height of the top of the stope face 1, and then arranging a screen pipe in the whole hole section of each high-level hydraulic fracturing drilling hole 6;
step three: the end part of the extraction pipe 8 in the negative pressure extraction device is inserted into the low-level high extraction roadway 4 through the sealing wall 5, so that the extraction pipe 8 is communicated with the low-level high extraction roadway 4, and the steps can effectively reduce the tunneling engineering quantity and the drilling construction engineering quantity, thereby being beneficial to relieving the problem of shortage of mining succession;
step four: starting a negative pressure pump 10, pumping air in a filter box 9 by the negative pressure pump 10 through a negative pressure pumping pipe 11, reducing the air pressure in the filter box 9, pumping a low-position high-pumping roadway 4 through a pumping pipe 8 to change an upper corner gas flow field and intercepting high-position hydraulic fracturing drilling holes 6 to pump high-concentration gas of adjacent layers, filtering the gas entering the filter box 9 through a first filter screen 16 and a first silk screen foam remover 17 under the action of the negative pressure pump 10, storing the gas in a gas storage tank 15 through a first negative pressure air outlet pipe 12 and a second filter screen 14, and collecting the impurity separated from the gas and fracturing fluid in a collecting cylinder 18 through a communication port 19 at the bottom of the filter box 9, and separating the filtered impurity and the fracturing fluid through a second filter screen 23 arranged in the collecting cylinder 18, thereby improving the purity of the recovered fracturing fluid so as to recycle the recovered fracturing fluid.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The extraction method for carrying out hydraulic fracturing drilling in the high extraction roadway is characterized by comprising the following steps of:
step one: a low-level high-suction roadway (4) which is parallel to the return air roadway (3) is arranged above a top plate of the coal seam (2) of the stoping working face (1), a closed wall (5) is built at a roadway opening of the low-level high-suction roadway (4), a plurality of high-level hydraulic fracturing drilling holes (6) which are inclined upwards are equidistantly arranged at the top of the low-level high-suction roadway (4) along the length direction of the low-level high-suction roadway, and the final holes of the high-level hydraulic fracturing drilling holes (6) are positioned at a height which is 10 times the stoping height of the top of the stoping working face (1), and all the high-level hydraulic fracturing drilling holes (6) are not sealed;
step two: carrying out hydraulic fracturing on each high-position hydraulic fracturing drilling hole (6), wherein the hydraulic fracturing section (7) is a hole section with the height 6-10 times of the mining height of the top of the mining working face (1), and then arranging a screen pipe in the whole hole section of each high-position hydraulic fracturing drilling hole (6);
step three: the end part of a suction pipe (8) in the negative pressure suction device is inserted into a low-position high suction roadway (4) through a sealing wall (5), so that the suction pipe (8) is communicated with the low-position high suction roadway (4);
step four: starting a negative pressure pump (10), extracting air in a filter box (9) by the negative pressure pump (10) through a negative pressure extraction pipe (11), reducing air pressure in the filter box (9), extracting a low-level high-extraction roadway (4) through an extraction pipe (8), changing an upper corner gas flow field, intercepting high-concentration gas of an adjacent layer through a high-level hydraulic fracturing drilling hole (6), and storing the gas entering the filter box (9) in a gas storage tank (15) through a negative pressure gas outlet pipe (12) and a gas inlet pipe (14) after filtering by a filter screen I (16) and a silk screen foam remover (17) under the action of the negative pressure pump (10).
2. The extraction method for carrying out hydraulic fracturing drilling in the high drainage roadway according to claim 1, wherein the vertical distance between the low-level high drainage roadway (4) and the roof of the coal seam (2) is 7-10 m, and the horizontal distance between the low-level high drainage roadway (4) and the return air roadway (3) is 15-20 m.
3. The extraction method for carrying out hydraulic fracturing drilling in a high-level drainage roadway according to claim 1, wherein the distance between two adjacent high-level hydraulic fracturing drilling holes (6) is 2 times of the gas extraction radius of a fracture zone.
4. The extraction method for carrying out hydraulic fracturing drilling in a high-pressure extraction roadway according to claim 1, wherein the negative pressure extraction device comprises a filter box (9), an extraction pipe (8) is fixedly communicated with the bottom of one side of the filter box (9), the free end part of the extraction pipe (8) is inserted into a low-position high-pressure extraction roadway (4) through a sealing wall (5), a negative pressure pump (10) is fixedly arranged on one side, far away from the extraction pipe (8), of the filter box (9) through a bolt, a negative pressure extraction pipe (11) is fixedly communicated between an extraction opening of the negative pressure pump (10) and the top of the filter box (9), a negative pressure air outlet pipe (12) is fixedly communicated with an air outlet of the negative pressure extraction pipe (10), a connecting pipe (13) is rotatably connected with the free end of the negative pressure air outlet pipe (12), an air inlet pipe (14) is connected with the free end of the connecting pipe (13) in a threaded mode, and a gas storage tank (15) is fixedly communicated with the free end of the air inlet pipe (14).
5. The extraction method for carrying out hydraulic fracturing drilling in a high drainage roadway according to claim 4, wherein a first filter screen (16) and a silk screen foam remover (17) are fixedly connected inside the filter box (9), the silk screen foam remover (17) is located above the first filter screen (16), and one end part of the extraction pipe (8) close to the filter box (9) is located below the first filter screen (16).
6. The extraction method for carrying out hydraulic fracturing drilling in a high-speed extraction roadway according to claim 4, wherein a collection cylinder (18) with an opening structure at the top is arranged at the bottom of the filter tank (9), a plurality of connecting holes are formed in the top of the collection cylinder (18) in a circumferential array relative to the axis of the collection cylinder, studs inserted into the corresponding connecting holes are fixedly connected to the bottom of the filter tank (9), the collection cylinder (18) is fixedly connected with the filter tank (9) through fixing nuts on the studs, a communication port (19) communicated with the collection cylinder (18) is formed in the bottom in the filter tank (9) in a penetrating mode, and a rubber sealing gasket (20) is arranged between the collection cylinder (18) and the filter tank (9).
7. The extraction method for carrying out hydraulic fracturing drilling in the high-speed extraction roadway according to claim 6, wherein a drain pipe (21) is fixedly communicated with the bottom of the collecting barrel (18), a valve I (22) is fixedly arranged on the drain pipe (21), and a filter screen II (23) is fixedly connected to the top in the collecting barrel (18).
8. The extraction method for carrying out hydraulic fracturing drilling in a high-pressure extraction roadway according to claim 4, wherein a fixing plate (24) is welded on one side, close to an air inlet pipe (14), of the connecting pipe (13), a sliding rod (25) is connected to the fixing plate (24) in a sliding mode, a conical blocking block (26) is fixedly connected to one end, far away from the air inlet pipe (14), of the sliding rod (25), a fixing ring (27) is welded on one side, close to a negative-pressure air outlet pipe (12), of the connecting pipe (13), a rubber sealing ring (28) matched with the conical blocking block (26) is fixedly connected to one side, close to the conical blocking block (26), of the fixing ring (27), a spring (29) is sleeved on the sliding rod (25), two ends of the spring (29) are fixedly connected with the fixing plate (24) and the conical blocking block (26) respectively, and one side of the conical blocking block (26) is abutted to one side of the rubber sealing ring (28) under the compression action of the spring (29).
9. The extraction method for carrying out hydraulic fracturing drilling in the high drainage roadway according to claim 4, wherein a valve II (30) is fixedly arranged on the air inlet pipe (14), and an air pressure gauge (31) is fixedly arranged between the valve II (30) and the gas storage tank (15) on the air inlet pipe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311392081.XA CN117145569A (en) | 2023-10-25 | 2023-10-25 | Extraction method for implementing hydraulic fracturing drilling in high extraction roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311392081.XA CN117145569A (en) | 2023-10-25 | 2023-10-25 | Extraction method for implementing hydraulic fracturing drilling in high extraction roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117145569A true CN117145569A (en) | 2023-12-01 |
Family
ID=88904557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311392081.XA Pending CN117145569A (en) | 2023-10-25 | 2023-10-25 | Extraction method for implementing hydraulic fracturing drilling in high extraction roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117145569A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB200887A (en) * | 1922-04-18 | 1923-07-18 | Alfred Napier Dickson | Improvements relating to valves for use in liquid supply systems |
| CN103912304A (en) * | 2014-04-23 | 2014-07-09 | 重庆市能源投资集团科技有限责任公司 | Method for locally extracting gas of soft coal seams |
| CN106968704A (en) * | 2017-04-19 | 2017-07-21 | 淮北矿业（集团）有限责任公司 | Gas drainage pipeline negative pressure dust removing device |
| CN109026134A (en) * | 2018-10-23 | 2018-12-18 | 山西新景矿煤业有限责任公司 | A kind of fully mechanized coal face low level extraction lane gas pumping method |
| CN110374542A (en) * | 2019-08-02 | 2019-10-25 | 华北科技学院 | A kind of mine gas extraction drilling blowout prevention aperture apparatus |
| CN110953015A (en) * | 2019-12-25 | 2020-04-03 | 太原理工大学 | Soft low-permeability coal seam long-drill-hole directional segmented fracturing efficient gas extraction method |
| CN216430614U (en) * | 2021-12-22 | 2022-05-03 | 山东水发动力能源科技有限公司 | Wet-type bleeding valve |
-
2023
- 2023-10-25 CN CN202311392081.XA patent/CN117145569A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB200887A (en) * | 1922-04-18 | 1923-07-18 | Alfred Napier Dickson | Improvements relating to valves for use in liquid supply systems |
| CN103912304A (en) * | 2014-04-23 | 2014-07-09 | 重庆市能源投资集团科技有限责任公司 | Method for locally extracting gas of soft coal seams |
| CN106968704A (en) * | 2017-04-19 | 2017-07-21 | 淮北矿业（集团）有限责任公司 | Gas drainage pipeline negative pressure dust removing device |
| CN109026134A (en) * | 2018-10-23 | 2018-12-18 | 山西新景矿煤业有限责任公司 | A kind of fully mechanized coal face low level extraction lane gas pumping method |
| CN110374542A (en) * | 2019-08-02 | 2019-10-25 | 华北科技学院 | A kind of mine gas extraction drilling blowout prevention aperture apparatus |
| CN110953015A (en) * | 2019-12-25 | 2020-04-03 | 太原理工大学 | Soft low-permeability coal seam long-drill-hole directional segmented fracturing efficient gas extraction method |
| CN216430614U (en) * | 2021-12-22 | 2022-05-03 | 山东水发动力能源科技有限公司 | Wet-type bleeding valve |
Non-Patent Citations (2)
| Title |
|---|
| 戚志虎;周栓柱;翟文杰;石必明;: "高抽巷在五轮山煤矿瓦斯治理中的应用", 煤矿开采, no. 06, pages 105 - 122 * |
| 饶泽青等: "高抽巷在开采下保护层矿井中的应用", 煤炭技术, vol. 33, no. 04, pages 142 - 144 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105649578B (en) | Coal bed gas straight well bilayer separate pressure production method and its device | |
| CN106215543A (en) | It is easy to the vertical gas liquid separating method of fixing assembling | |
| CN112127940B (en) | Coal mine gas extraction device | |
| CN202560298U (en) | Gas dust slag water collector | |
| CN102817630A (en) | Gas dust and slag water collector | |
| CN203516027U (en) | Sand-proof and gas-proof integrated oil production device | |
| CN117145569A (en) | Extraction method for implementing hydraulic fracturing drilling in high extraction roadway | |
| CN209838472U (en) | Coal bed gas collection device | |
| CN218177274U (en) | Mine gas extraction device | |
| CN106215545A (en) | Low-pressure gas well multiple filtration gas-liquid separation device | |
| CN206631329U (en) | Air-control device geomantic omen separator | |
| CN214366026U (en) | High-efficient ecological oil-water separation system | |
| CN201738912U (en) | Wellhead gravity flow type purification and liquid-removal device | |
| CN210829135U (en) | Coal mine dust removal device capable of achieving green mining | |
| CN208049654U (en) | Horizontal multi-stage separator | |
| CN201705266U (en) | Coalbed gas wellhead device for exhausting coal water and gas and injecting water | |
| CN106215566A (en) | Low-pressure gas well multiple filtration gas-liquid separating method | |
| CN109372725A (en) | Catch pot | |
| CN214158661U (en) | Directional rig water installation that filters | |
| CN209293848U (en) | A kind of hole punched device that Coal Exploitation is mining | |
| CN207332841U (en) | Oil pumping well pipe column | |
| CN109798096A (en) | Pumping method is let out in pressure on a kind of half-edge coal seam layer-through drilling | |
| CN217735424U (en) | Diversion air exhaust device for coal seam drilling construction | |
| CN213540353U (en) | Associated gas is tubular column in pit for reinjection | |
| CN207332859U (en) | Fine and close oil exploitation separation control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |