CN113446010A - High-stress coal seam branch-injection and discharge integrated comprehensive treatment method - Google Patents
High-stress coal seam branch-injection and discharge integrated comprehensive treatment method Download PDFInfo
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- CN113446010A CN113446010A CN202110784457.6A CN202110784457A CN113446010A CN 113446010 A CN113446010 A CN 113446010A CN 202110784457 A CN202110784457 A CN 202110784457A CN 113446010 A CN113446010 A CN 113446010A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention provides a high-stress coal seam unloading, supporting and injecting integrated comprehensive treatment method, which comprises the steps of firstly executing advanced pressure relief drilling on a working face, performing summary analysis on pressure monitoring data and pressure display characteristics of the working face, performing key prevention and control on a top plate of an abnormal incoming pressure region, and timely supplementing pressure to a support, then performing truss girder advanced reinforcement measures on a top plate of a mining roadway of the advanced working face, integrally fixing a shallow rock stratum in a deep stable rock stratum through U-shaped steel and a lifting anchor rope, finally adopting a water injection mode of matching a deep hole, a shallow hole and two roadway bedding layers on the working face, drilling the hole of an original air roadway, namely a bedding drainage drilling hole and reaming hole by using a drilling machine along with a bedding water injection hole, and circularly performing hole selection, reaming, water injection and secondary water injection along with the mining face. The 'unloading and injection' integrated technology can effectively maintain the integrity of a stoping roadway, eliminate gas overrun, reduce the gas emission amount, fully wet coal bodies, reduce coal seam caving and outburst danger, has obvious dust fall effect and improves the working environment of workers.
Description
Technical Field
The invention relates to a high-stress coal seam discharge-injection integrated comprehensive treatment method, which can effectively maintain the integrity of a stoping roadway, eliminate gas overrun, reduce the gas emission amount, fully wet coal bodies, reduce coal seam caving and outburst risks, and is particularly suitable for solving the technical problem of safe and efficient mining of a high-stress outburst coal seam working face.
Background
The natural resources of China have the characteristics of rich coal, poor oil and less gas, so that coal always accounts for 70% of primary energy consumption of China. With the exhaustion of shallow resources, the mining depth of mines in China is shifted to the deep part at a speed of 10-20m each year. Along with the annual increase of the mining depth of a mine, most coal mining working faces face the problems of surrounding rock stress increase, difficult maintenance, easy gas overrun and the like, large-area caving of coal walls is easy to occur under the action of high stress concentration in the stoping process of the high-stress outburst coal seam working face, even outburst accidents of coal and gas are induced, the dust production is large during the coal cutting period, the working face operation environment is poor, and the safe and efficient mining of the working face is severely restricted.
In order to solve the problems of high stress of surrounding rock of a deep coal seam, gas overrun and the like, a plurality of methods are carried out, the traditional drilling pressure relief method is greatly popularized in China, and the technology is an economical, reasonable and efficient technology for reducing the stress of the surrounding rock of a roadway. The drilling pressure relief technology is to drill holes on the top plate or two sides of the surrounding rock of the roadway, redistribute the stress in the surrounding rock, control the deformation of the surrounding rock, make the high stress of the surrounding rock at the shallow part of the tunneling roadway migrate and change to the deep part of the surrounding rock, and make the surrounding rock around the roadway in a low stress area, thereby increasing the stability of the surrounding rock of the roadway. But the pressure relief of the drill hole weakens the surrounding rock structure while transferring the stress of the surrounding rock, and meanwhile, the deformation of the surrounding rock becomes large, and the roadway is difficult to maintain. The coal seam water injection is to inject pressure water through a drill hole to enable the pressure water to permeate into the coal body, so that the water content and the plasticity of the coal body are increased, the side caving and outburst danger of the coal seam are prevented, the dust yield during coal cutting is reduced, and the gas concentration in the return air flow of a working face is reduced. However, the conventional single-hole water injection has low efficiency and poor coal wall infiltration effect, the pressure of the hole packer is not uniform during water injection, and the problem that water is easy to flow out of adjacent holes occurs. Therefore, the invention provides a three-in-one comprehensive treatment method for 'branch discharging' by combining the advantages of the prior technologies and improving the defects of the technologies.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for integrally and comprehensively treating unloading, supporting and injecting of a high-stress coal seam.
The invention relates to a high-stress coal seam unloading, branch injection and integrated comprehensive treatment method, which comprises the following steps of:
a. the method comprises the following steps of (1) defining a pressure relief space range for a high-stress outburst coal seam working face, determining parameters such as the length and the aperture of a pressure relief drilling hole, and after the pressure relief drilling hole parameters are determined, adopting a high-power drilling machine to construct an advanced pressure relief drilling hole in a stoping roadway on the working face;
b. monitoring the supporting condition of the working face stoping roadway, firstly summarizing and analyzing pressure monitoring data and pressure display characteristics of the working face, performing key prevention and control on a top plate of an inflow pressure abnormal area of a working face hydraulic support, timely supplementing pressure to the working face hydraulic support, and performing truss girder advanced reinforcement measures on the top plate of the advance working face stoping roadway so as to integrally fix a shallow rock stratum in a deep stable rock stratum through U-shaped steel and a lifting anchor cable;
c. the method is characterized in that water injection is carried out on a working face in a deep hole and shallow hole and two roadway bedding matched water injection mode, bedding water injection holes are water injection holes obtained by mechanically reaming original bedding gas extraction holes of a roadway, the water injection holes move outwards along with the advancing of a coal face, and hole selection, reaming, water injection and secondary water injection are carried out in a circulating mode.
Further, in the parameter setting of the advanced pressure relief drill hole in the step a, aiming at specific gas occurrence conditions and pressure relief space ranges, the projection of the pressure relief drill hole on the working surface can cover the advanced support pressure boosting area, namely when the construction pressure relief drill hole has a certain inclination angle with the horizontal direction, the projection of the pressure relief drill hole in the horizontal direction needs to cover the advanced support pressure boosting area. The advanced supporting pressure boosting area refers to an area where the surrounding rock body stress of a stope is redistributed and the supporting pressure in front of a working face is increased along with the advance of the working face in the coal seam mining process.
Furthermore, in the hydraulic support for the working surface in the step b, the proportion of the support with the pressure (the pressure of a pressure gauge of the hydraulic support) larger than the set initial support resistance value is more than 80%. The initial support resistance value refers to the numerical value of the support force of the support to the top plate when all stand columns of the support rise and the top beam is tightly connected with the top plate under the action of the working pressure of the pump station.
Further, the pressure-coming abnormal region described in step b is classified into a stress concentration region, a severe pressure-coming region, and a structural pressure-coming region in summary.
Further, the truss girder advanced reinforcement measure of the step b includes: and drilling an anchor hole on a top plate rock stratum of the mining roadway, mounting an anchor cable in the anchor hole by matching with the U-shaped steel, and integrally fixing the shallow rock stratum in the deep stable rock stratum through the U-shaped steel and the lifting anchor cable.
Furthermore, the water injection mode in the step c adopts a water injection optimal mode of 'medium pressure 5-7MPa + three-hole equal pressure', and three-way constant pressure water injection pipes are adopted, so that water can be simultaneously injected into three water injection holes, the water injection efficiency is improved, the management workload of pipelines is simplified, each water injection hole can be ensured to keep the same water injection pressure, the water injection hole pressure-equalizing water injection is realized, and the purposes of reducing the water outflow of adjacent holes and improving the water injection quantity are achieved.
And further, processing an adjacent hole wedge-shaped wood plug according to the diameter of the shallow hole water injection hole to prevent the shallow hole adjacent hole from discharging water.
The invention has the beneficial effects that: according to the invention, the drilling is carried out on the working surface, so that the horizontal projection of the drilling hole can cover the advanced pressure relief drilling hole of the advanced support pressure boosting area, thus the pressure can be relieved well, and the gas covered by the coal seam can be discharged; by summarizing and analyzing pressure monitoring data and pressure display characteristics of a working face, the top plate of an incoming pressure abnormal area is mainly prevented and controlled, and the supports are timely pressurized, so that the phenomena of large-area rib spalling, support deadpressing and the like of a coal wall can be prevented; and the advance reinforcing measure of the truss girder is carried out on the mining roadway top plate of the advance working face, so that the integrity of the mining roadway is effectively maintained. The invention utilizes the independently developed three-way constant-pressure water injection pipe technology, can simultaneously inject water into three water injection holes, improves the water injection efficiency, simplifies the pipeline management workload, ensures that each water injection hole keeps the same water injection pressure, realizes water injection hole pressure-equalizing water injection, and achieves the purposes of reducing the water outlet of adjacent holes and improving the water injection quantity. The wedge-shaped wooden plug of the adjacent hole is processed according to the diameter of the shallow hole water injection hole, so that the water outlet of the shallow hole adjacent hole is prevented, the coal wall is favorable for cracking, the water injection diffusion radius and the coal wall infiltration effect are increased, the coal body is fully wetted, the possibility of rib spalling and outburst danger of the coal bed is reduced, the dust fall effect is obvious, and the working environment of workers is improved. The comprehensive treatment method integrating multiple parts has important practical significance for maintaining safe and efficient mining of the high-stress outburst coal seam working face.
Drawings
Fig. 1 is a structural view of a roof truss beam.
Fig. 2 is a structural schematic diagram of a three-way constant-pressure water injection pipe.
Fig. 3 is a schematic diagram of a water injection mode using a three-way constant pressure water injection pipe.
Detailed Description
The present invention will be described in further detail below with reference to specific examples and the accompanying drawings.
One embodiment of the invention provides a high-stress coal seam branch and branch injection integrated comprehensive treatment method, which comprises the following steps:
a. pressure relief borehole
The method is characterized in that the pressure relief space range is determined for the working face of the high-stress outburst coal seam, parameters such as the length and the aperture of a pressure relief drilling hole are determined, after the pressure relief drilling hole parameters are determined, a high-power drilling machine is adopted to construct an advanced pressure relief drilling hole in the stoping roadway of the working face, so that the projection of the pressure relief drilling hole of the working face in the horizontal direction can cover an advanced supporting pressure boosting area, the supporting pressure in front of the coal wall is reduced, gas covered by the coal seam can be discharged, and the roadway construction safety is facilitated.
b. Supporting reinforcement
And then monitoring the supporting condition of the mining roadway of the advanced working face, and firstly summarizing and analyzing pressure monitoring data and pressure display characteristics of the working face. The pressure-incoming abnormal area of the hydraulic support on the working face is summarized and classified into a stress concentration area, a severe pressure-incoming area, a structural pressure-incoming area and the like, the top plate of the pressure-incoming abnormal area is subjected to key prevention and control, the support is timely supplemented with pressure, and the phenomena of large-area rib spalling, support deadpressing and the like of the coal wall are prevented.
The working face hydraulic support is a hydraulic support arranged on a coal mining working face and used for bearing the load of a working face top plate.
The stress concentration area refers to a stress concentration area formed in front of a mined coal body by redistributing the stress of surrounding rocks of a roadway or a mining field in the coal seam mining process; the 'severe pressure area' refers to a region with severe bearing pressure influence of the zones which are positioned on two sides of the coal face and have a certain distance from the edge of a coal body; "formation-to-compression zone" refers to a zone of stress anomaly due to various formations in the formation. And aiming at different areas, taking targeted measures to perform key prevention and control. The stress concentration area and the violent incoming pressure area supplement pressure to the hydraulic support of the working face in time, so that the effective supporting effect on the top plate of the working face is improved; the 'structural coming pressure area' is adjusted by adjusting the posture of the hydraulic support of the working face to ensure that the effective supporting area of the working face top plate is ensured, and the wire mesh is added in the crushing area to ensure the integrity of the working face top plate.
The pressure compensation in the support and timely pressure compensation refers to increasing the bearing pressure of the hydraulic support for the area with abnormal pressure of the top plate, so that the situations of support dead pressing and the like are prevented.
In the coal face, the load from the top plate is jointly borne by the support and the coal body of the face, if the working resistance of the face support is insufficient, the load of the top plate can be transferred to the coal body in front of the face, the load borne by the coal body is increased, and when the load exceeds the strength limit of the coal body, the coal body is subjected to plastic deformation, so that the coal wall caving is caused. The method is characterized in that a truss girder advanced reinforcing measure is carried out on a top plate of the stoping roadway of the advanced working face, namely, an anchor hole is drilled in a top plate rock stratum of the stoping roadway, an anchor cable is installed in the anchor hole in a matched mode with U-shaped steel, a shallow rock stratum is integrally fixed in a deep stable rock stratum through the U-shaped steel and a lifting anchor cable, and the integrity of the stoping roadway is effectively maintained.
Specifically, the "truss girder advanced reinforcement measure" refers to: under the mining disturbance action in the coal mining process, a bearing pressure area is formed in front of the coal mining working face to damage a transportation roadway and a return airway of a coal mining system, so that a truss beam is added in front of the coal mining working face for reinforcing and supporting at a certain distance on the basis of original supporting. As shown in fig. 1, anchor cable drilling holes, namely anchor holes, are drilled at two ends of mining U-shaped steel (such as U29 shaped steel), anchor holes are drilled on a top plate rock stratum of a mining roadway, two anchor cables penetrate through the anchor holes at two ends of the U-shaped steel and the anchor holes on the top plate rock stratum, the U-shaped steel is fixed to a roadway top plate (only the anchor cable at one end of the U-shaped steel is shown in fig. 1), the anchor cables and the U-shaped steel form truss girders, a shallow rock stratum is integrally fixed in a deep stable rock stratum, and a group of truss girders are axially arranged in a vertical roadway at intervals in front of the roadway top plate of a coal face, so that the aim of reinforcing the roadway top plate rock stratum is achieved. In fig. 1, the anchor cable head is used for fixing the anchor cable and increasing the pre-tightening force of the anchor cable, and the W-shaped steel belt between the U-shaped steel and the top plate is used for increasing the stress area between the anchor cable and the top plate to prevent the anchor cable from damaging the rock stratum of the top plate due to overlarge stress.
c. Coal seam water injection
The working face adopts a deep hole, a shallow hole and a water injection mode of two roadway bedding matching, and the bedding water injection hole is obtained by mechanically reaming the original bedding gas extraction hole of the roadway.
In the present embodiment, the deep hole in the "deep and shallow hole" refers to a hole having a depth of 22.5m, and the shallow hole refers to a hole having a depth of 8 m. The deep hole water injection is mainly used, the deep hole water injection holes are arranged at intervals, shallow holes are added among deep holes according to smaller intervals in areas with obvious coal wall deformation, geological structure areas and the like and poor deep hole water injection effects, and the water injection effect is enhanced.
Wherein, the 'two lanes' refer to a transport lane and a return airway in the coal mining system; the 'bedding water injection hole' refers to a drilled hole which is drilled along the coal seam trend in the transportation lane and the return airway; the 'two-lane bedding matching' means that the transportation lane and the return air lane are drilled with drill holes at the same time; the 'original air tunnel sealed hole' is a bedding gas drainage hole, namely the bedding gas drainage hole reserved in the tunneling period, namely the gas drainage hole drilled along the coal seam inclination direction, and concrete pouring sealing is adopted around the hole opening drainage pipe in order to ensure the gas drainage effect.
The water injection pipeline is connected with the hydraulic pipeline of the working face, the connection condition of the pipeline and the sealer is checked, the water suction port of the hydraulic pump is communicated with the hydraulic water tank, the water tank is filled with water, and the water quantity of the water tank is ensured to meet the water injection quantity. Debugging the water injection equipment, starting a hydraulic pump, opening a water outlet valve, and adjusting a pressure regulating device at the front end of a sealing device to enable a pressure gauge of the hydraulic pump to reach a specified pressure, wherein a three-way constant-pressure water injection pipe shown in figures 2 and 3 is adopted to enable the water injection pressure of three water injection holes to be consistent, and the pressure is about 5-7 MPa. And putting the sealer into the hole, closing the pressure relief valve, opening the stop valve, injecting water into the hole, managing the water injection by adopting a hole-dividing metering mode, pushing the water injection hole outwards along with the advancing of the coal face, and circularly performing hole selection, hole expansion, water injection and secondary water injection.
Wherein, the hole selection refers to the selection of a proper hole expanding position, and aims to facilitate the water injection of the drilled hole. The hole expansion means that the original gas extraction hole is used for water injection, and the diameter of the original gas extraction hole needs to be increased through hole expansion in order to install the water injection pipe because the diameter of the original gas extraction hole is smaller than that of the water injection pipe. Water injection is the injection of water into the borehole in order to wet the coal around the borehole. The secondary water injection means that water injected into a coal seam flows along fractures of the coal seam, a contact surface with a coal body is increased, and continuous cracking of rock stratum fractures around a drill hole can be caused in the coal mining process.
Through different pressure ranges and water injection modes of field tests, as shown in fig. 2 and fig. 3, the optimal water injection mode of 'medium pressure 5-7MPa + three-hole equal pressure' is determined, so that the coal wall is cracked, the water injection diffusion radius and the coal wall infiltration effect are increased, the water injection pressure of three water injection holes is ensured to be consistent, and the problem of water outlet of adjacent holes caused by hole sealing pressure difference is effectively solved. The wedge-shaped wooden plug of the adjacent hole is processed according to the diameter of the shallow hole water injection hole, so that the water outlet of the shallow hole adjacent hole is prevented, the water injection quantity is obviously improved, the dust fall effect is obvious, and the operation environment of workers is improved. The water injection mode is that a single water injection hole or a group of 3 water injection holes which are arranged in advance are sequentially injected by adopting a water injector, and the adjacent holes are holes which are close to the holes which are not injected with water and are adjacent to the holes which are injected with water. Because of in the exploitation process coal wall inside can be because of taking place to destroy and produce the microfracture, adopt certain water pressure to carry out the water injection to the water injection hole, part of water can flow to near the hole and flow from the drill way along the microfracture, reduce the effective water injection volume to this hole, and wedge-shaped wooden plug increases from one end to another end diameter gradually, insert earlier by little diameter end when blocking up the hole, carry out the hammering at major diameter end and can be with the more closely knit of hole blocking, prevent that the adjacent hole from going out water when carrying out the water injection to the hole, increase the effective water injection volume of water injection hole.
The invention is used for leveling coal and refining coal in ten mines1533200, the working face is implemented, the integrity of a mining roadway is effectively maintained by adopting truss girder reinforced support, the subsidence of the top plate is controlled within 500mm, the deformation of surrounding rocks is controlled, and the stability of the top plate is maintained. After water injection measures are implemented, the gas emission of the working face is balanced, the peak value is weakened, the volume fraction of the return air flow gas is reduced to 0.4-0.6%, the average gas volume fraction is reduced by about 0.4%, the condition of gas overrun is eliminated, and the gas emission quantity is reduced. The water content of the coal wall after the coal seam is injected with water is increased to about 6 percent from about 1 percent before the water injection. The coal body is fully wet, and the coal wall is flat without rib. The reduction distribution of the content of the total dust and the content of the expired dust on the working face reaches 40 percent and 30 percent during the coal cutting period, the dust settling effect is obvious, the working environment of workers is improved, the average advancing speed of the mining face is increased from 3 round workers to 7 round workers in the past by implementing the coal bed unloading, injection and unloading integrated comprehensive treatment method, the coal yield of the round workers is increased from 1853.3 tons to 4324.3 tons, and the safe and efficient production effect is obvious.
The truss girder advanced support can also adopt modes of grouting, anchor cable encryption and the like to reinforce the top plate of the advanced roadway.
The particular embodiments of the present invention disclosed above are illustrative only and are not intended to be limiting, since various alternatives, modifications, and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The invention should not be limited to the disclosure of the embodiments in the present specification, but the scope of the invention is defined by the appended claims.
Claims (8)
1. A method for integrally and comprehensively treating high-stress coal seam discharge and branch injection is characterized by comprising the following steps:
the method comprises the following steps of (1) defining a pressure relief space range aiming at a high-stress outburst coal seam working face, determining pressure relief drilling parameters, and adopting a high-power drilling machine to construct advanced pressure relief drilling holes in stoping roadways of the working face;
monitoring the supporting condition of a working face stoping roadway, performing key prevention and control on a top plate of an inflow pressure abnormal region of a working face hydraulic support, timely supplementing pressure to the working face hydraulic support, and performing truss girder advanced reinforcement measures on a top plate of an advance working face stoping roadway so as to integrally fix a shallow rock stratum in a deep stable rock stratum through U-shaped steel and a lifting anchor cable;
the method is characterized in that water injection is carried out on a working face in a deep hole and shallow hole and two roadway bedding matched water injection mode, bedding water injection holes are water injection holes obtained by mechanically reaming original bedding gas extraction holes of a roadway, the water injection holes move outwards along with the advancing of a coal face, and hole selection, reaming, water injection and secondary water injection are carried out in a circulating mode.
2. The high-stress coal seam branch injection and unloading integrated comprehensive treatment method according to claim 1, characterized by comprising the following steps of: the parameter setting of the advanced pressure relief drill hole aims at specific gas occurrence conditions and pressure relief space ranges, and the projection of the pressure relief drill hole on the working surface can cover the advanced support pressure boosting area.
3. The high-stress coal seam branch injection and unloading integrated comprehensive treatment method according to claim 1, characterized by comprising the following steps of: in the working face hydraulic support, the proportion of the support with the pressure larger than the set initial support resistance value is more than 80%.
4. The high-stress coal seam branch injection and unloading integrated comprehensive treatment method according to claim 1, characterized by comprising the following steps of: the pressure-coming abnormal area is classified into a stress concentration area, a severe pressure-coming area and a structural pressure-coming area, and the important prevention and control is performed by taking targeted measures for different areas.
5. A high-stress coal seam branch and injection integrated comprehensive treatment method according to claim 4, wherein the specific measures for different areas are used for key prevention and control, and the method comprises the following steps: in the stress concentration area and the severe pressure coming area, the working face hydraulic support is subjected to timely pressure supplementing, so that the effective supporting effect on the working face top plate is increased; in the structural pressure region, the posture of the hydraulic support of the working face is adjusted, the effective supporting area of the top plate of the working face is ensured, and the wire mesh is added in the crushing region to ensure the integrity of the top plate of the working face.
6. The high-stress coal seam branch injection and unloading integrated comprehensive treatment method according to claim 1, characterized by comprising the following steps of: the truss girder advanced reinforcement measures comprise: and drilling an anchor hole on a top plate rock stratum of the mining roadway, mounting an anchor cable in the anchor hole by matching with the U-shaped steel, and integrally fixing the shallow rock stratum in the deep stable rock stratum through the U-shaped steel and the lifting anchor cable.
7. The high-stress coal seam branch injection and unloading integrated comprehensive treatment method according to claim 1, characterized by comprising the following steps of: the water injection mode adopts a water injection optimal mode of medium pressure 5-7MPa + three-hole isobaric, three water injection holes are simultaneously injected with water by adopting a three-way constant-pressure water injection pipe, each water injection hole keeps the same water injection pressure, and the pressure is about 5-7 MPa.
8. The high-stress coal seam branch injection and unloading integrated comprehensive treatment method according to claim 1, characterized by comprising the following steps of: and when water is injected, processing an adjacent hole wedge-shaped wood plug according to the diameter of the shallow hole water injection hole, and preventing the shallow hole adjacent hole from discharging water.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713290A (en) * | 2009-12-10 | 2010-05-26 | 天地科技股份有限公司 | Method for clearing rock burst of full-mine laneway deep in mine |
| CN103397883A (en) * | 2013-08-21 | 2013-11-20 | 大同煤矿集团有限责任公司 | Comprehensive control method for rockburst in multiple-coalbed mining mine |
| CN104832198A (en) * | 2015-03-13 | 2015-08-12 | 中煤科工集团重庆研究院有限公司 | Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method |
| CN106968706A (en) * | 2017-05-24 | 2017-07-21 | 太原理工大学 | A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving |
| CN109209472A (en) * | 2018-07-27 | 2019-01-15 | 中国矿业大学 | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple |
| CN110242347A (en) * | 2019-07-01 | 2019-09-17 | 辽宁工程技术大学 | The construction method of the compound disaster of " release-extraction-water filling " integration prevention and control coal petrography |
-
2021
- 2021-07-12 CN CN202110784457.6A patent/CN113446010B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713290A (en) * | 2009-12-10 | 2010-05-26 | 天地科技股份有限公司 | Method for clearing rock burst of full-mine laneway deep in mine |
| CN103397883A (en) * | 2013-08-21 | 2013-11-20 | 大同煤矿集团有限责任公司 | Comprehensive control method for rockburst in multiple-coalbed mining mine |
| CN104832198A (en) * | 2015-03-13 | 2015-08-12 | 中煤科工集团重庆研究院有限公司 | Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method |
| CN106968706A (en) * | 2017-05-24 | 2017-07-21 | 太原理工大学 | A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving |
| CN109209472A (en) * | 2018-07-27 | 2019-01-15 | 中国矿业大学 | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple |
| CN110242347A (en) * | 2019-07-01 | 2019-09-17 | 辽宁工程技术大学 | The construction method of the compound disaster of " release-extraction-water filling " integration prevention and control coal petrography |
Non-Patent Citations (1)
| Title |
|---|
| 张高坤: "综采工作面安全通过强矿压危险区域技术研究", 《科技风》 * |
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