CN113847030A - Fault rock burst prevention and control system and method - Google Patents
Fault rock burst prevention and control system and method Download PDFInfo
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- CN113847030A CN113847030A CN202110963957.6A CN202110963957A CN113847030A CN 113847030 A CN113847030 A CN 113847030A CN 202110963957 A CN202110963957 A CN 202110963957A CN 113847030 A CN113847030 A CN 113847030A
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- 239000011435 rock Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000002265 prevention Effects 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 183
- 238000002347 injection Methods 0.000 claims abstract description 94
- 239000007924 injection Substances 0.000 claims abstract description 94
- 239000003245 coal Substances 0.000 claims abstract description 67
- 239000002184 metal Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 15
- 239000002360 explosive Substances 0.000 claims description 10
- 238000005422 blasting Methods 0.000 claims description 6
- 230000008719 thickening Effects 0.000 claims description 4
- 238000005065 mining Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Physics & Mathematics (AREA)
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- Fluid Mechanics (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a fault rock burst prevention and treatment system and a fault rock burst prevention and treatment method, the fault rock burst prevention and treatment system comprises a surface soil layer, a rock layer, a coal layer and a high-pressure water injection system, wherein the surface soil layer is positioned at the upper part of the rock layer, the middle part of the rock layer is the coal layer, the coal layer comprises a fault upper disc, a fault lower disc and a fault surface, the fault surface is arranged between the fault upper disc and the fault lower disc, the fault surface is provided with a charging drill hole, the fault upper disc and the fault lower disc are both provided with high-pressure water injection drill holes, the high-pressure water injection system is inserted into the coal layer through the high-pressure water injection drill holes, the high-pressure water injection system comprises a water tank, a metal water injection pipe, a high-pressure water pump, a water stop valve and a sealing assembly, one end of the metal water injection pipe is connected to a water outlet of the water tank, the other end of the metal water injection pipe is sequentially connected with the high-pressure water pump, the water stop valve and the sealing assembly, and the sealing assembly is fixedly connected between the side wall of the metal water injection drill holes; the invention has the advantages of being capable of adapting to high stress areas, breaking in a burst mode and stably preventing and treating rock burst disasters for a long time.
Description
Technical Field
The invention belongs to the technical field of coal mine fault rock burst prevention and control, and particularly relates to a fault rock burst prevention and control system and a fault rock burst prevention and control method.
Background
Rock burst is a phenomenon in which a deep portion of an underground mine or a region having a high structural stress causes a sudden failure in an adjacent hollow rock mass. This phenomenon is also known as rock burst. This occurs because the strain energy adjacent to the volume accumulation of the empty rock is suddenly and violently released all together, causing brittle fracture of the rock mass like an explosion. Rock burst causes a great deal of rock to collapse and generates huge sound and wave impact, which can not only destroy mines, but also endanger ground buildings. The damage of rock burst greatly seriously threatens the life safety of coal mine personnel, and is a huge hidden danger in coal mine safety mining. However, methods for controlling rock burst are relatively few, especially fault rock burst, and therefore, for the fault rock burst, a method capable of adapting to a high-stress area, breaking in a burst mode and stably controlling the disaster of the rock burst for a long time is needed to be invented.
Disclosure of Invention
According to the technical problems described in the background art, the invention provides a fault rock burst prevention and treatment system and a fault rock burst prevention and treatment method, which can effectively prevent and treat fault rock burst and solve disasters and hidden dangers caused by rock burst.
The invention adopts the technical scheme that the fault rock burst prevention and control system comprises a surface soil layer, a rock layer, a coal layer and a high-pressure water injection system;
the surface soil layer is positioned at the upper part of the rock layer, the middle part of the rock layer is a coal layer, the coal layer comprises a fault upper disc, a fault lower disc and a fault surface, the fault surface is arranged between the fault upper disc and the fault lower disc, charge drill holes are formed in the fault surface, high-pressure water injection drill holes are formed in the fault upper disc and the fault lower disc, and the high-pressure water injection system is inserted into the coal layer through the high-pressure water injection drill holes;
high-pressure water injection system includes water tank, metal water injection pipe, high-pressure water pump, stagnant water valve and seal assembly, metal water injection pipe one end is connected on the delivery port of water tank, the other end has connected gradually high-pressure water pump, stagnant water valve and seal assembly, seal assembly fixed connection at the metal water injection pipe with between the lateral wall of the drilling of the water under high pressure, seal assembly includes buckle and wedge, the buckle joint is fixed on the wedge.
Furthermore, one section of the metal water injection pipe in the wedge-shaped body is a water injection pipe thickening section.
Furthermore, the tail end of the metal water injection pipe is uniformly provided with water outlet holes.
Further, the buckle is an elastic component.
Furthermore, a clearance hole which is connected with the metal water injection pipe in a matched mode is arranged on the wedge-shaped body.
The method for preventing and controlling the fault rock burst control system releases stress through stress concentration, and mines the coal seam at the fault after the high stress is released, and specifically comprises the following steps:
the method comprises the following steps of firstly, exploring a fault plane of a coal seam and specific positions of a fault upper disc and a fault lower disc;
secondly, drilling holes on the ground surface to reach the fault upper wall and the fault lower wall near the fault surface respectively;
thirdly, filling a proper amount of explosive into the bottom of the charging drill hole of the fault surface and blasting to release stress of stress concentration at the fault surface;
fourthly, after the high stress of the fault surface is relieved, high-pressure metal water injection pipes are arranged in the high-pressure water injection drill holes of the upper fault disc and the lower fault disc to perform high-pressure water injection, and the coal seams of the upper fault disc and the lower fault disc are subjected to high-pressure water fracturing, so that the coal seams in the stress concentration area further release the stress;
fifthly, in the water injection process, if water in the metal water injection pipe enters the coal body and then the water pressure is not released from the side wall of the high-pressure water injection drill hole, when the water overflows upwards, the wedge body in the sealing assembly can be compressed upwards to enable the buckle and the side wall of the high-pressure water injection drill hole to be tightened more, so that the water pressure is not released, the water pressure is completely used for fracturing the coal seam, and the metal water injection pipe at the wedge body is thickened to enable the water pressure not to leak;
sixthly, in the water injection process, if water is injected into the coal bed from the water tank through the high-pressure water pump and the metal water injection pipe, water injection control can be performed through the water stop valve when water leaks;
and seventhly, when the high stress of the coal seam at the position of the high-pressure water injection drill hole and the high-pressure water charge drill hole is completely relieved, the coal seam at the fault face can be safely mined, and therefore rock burst hazard caused by stress concentration at the fault is avoided.
The invention has the following beneficial effects:
1. the invention carries out explosive charging and blasting on the fault face by drilling holes on the earth surface towards the fault face of the coal bed, the upper fault disc and the lower fault disc, carries out high-pressure water injection and fracturing on the upper fault disc and the lower fault disc, leads the stress of the fault to be concentrated and carries out stress release, then mines the coal bed at the fault after releasing the high stress, and plays an important role in preventing and treating fault rock burst.
2. The sealing assembly is arranged, so that the possibility that water pressure is released can be effectively solved, and the acting force of the water pressure is maximized and the sealing assembly is used for fracturing the coal seam.
3. The three-hole coal seam high-stress relief device is simple in structure and convenient to operate, high stress relief is completely finished on the coal seam at the drilling position through the three drill holes, safe mining of the coal seam at the fault is facilitated, and therefore rock burst hazard caused by stress concentration at the fault is avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an enlarged view of the seal assembly structure of the present invention.
FIG. 3 is a schematic view of the end of the metal water injection pipe according to the present invention.
In the figure: 1. a top soil layer; 2. a rock layer; 3. a coal seam; 31. hanging the disc on the fault; 32. fault footwall; 33. fault plane; 34. injecting high-pressure water for drilling; 35. charging and drilling; 4. a high pressure water injection system; 41. a water tank; 42. a metal water injection pipe; 43. a high pressure water pump; 44. a water stop valve; 45. a seal assembly; 46. buckling; 47. a wedge; 48. a water injection pipe thickening section; 49. a water outlet hole; 50. a clearance hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, a fault rock burst control system includes a topsoil layer 1, a rock layer 2, a coal layer 3 and a high-pressure water injection system 4;
the surface soil layer 1 is located on the upper portion of the rock layer 2, the coal layer 3 is arranged in the middle of the rock layer 2, the coal layer 3 comprises an upper fault plate 31, a lower fault plate 32 and a fault surface 33, the fault surface 33 is arranged between the upper fault plate 31 and the lower fault plate 32, a charging drill hole 35 is formed in the fault surface 33, high-pressure water injection drill holes 34 are formed in the upper fault plate 31 and the lower fault plate 32, and the high-pressure water injection system 4 is inserted into the coal layer 3 through the high-pressure water injection drill holes 34;
high-pressure water injection system 4 includes water tank 41, metal water injection pipe 42, high pressure water pump 43, stagnant water valve 44 and sealing assembly 45, metal water injection pipe 42 one end is connected on the delivery port of water tank 41, the other end has connected gradually high pressure water pump 43, stagnant water valve 44 and sealing assembly 45, sealing assembly 45 fixed connection at metal water injection pipe 42 with annotate between the lateral wall of high pressure water drilling 34, sealing assembly 45 includes buckle 46 and wedge 47, buckle 46 joint is fixed on wedge 47.
In the preferred embodiment, one section of the metal water injection pipe 42 in the wedge 47 is a water injection pipe thickening section 48, so that the water pressure is not easy to leak.
In the preferred embodiment, the ends of the metal water injection pipes 42 are uniformly provided with water outlet holes 49, so that the hydraulic pressure force is uniformly applied to the fracturing of the coal seam.
In the preferred embodiment, the fastener 46 is an elastic member, and when the wedge is compressed upward, the wedge can be attached to the hole wall more, so that the water pressure is not easily released, and the water injection efficiency is improved.
In the preferred embodiment, the wedge 47 is provided with a clearance hole 50 for matching and connecting with the metal water injection pipe 42.
The method for preventing and controlling the fault rock burst control system releases stress through stress concentration, and mines the coal seam 3 at the fault position after the high stress is released, and specifically comprises the following steps:
firstly, exploring a fault plane 33 of the coal seam 3 and specific positions of a fault upper disc 31 and a fault lower disc 32;
secondly, drilling holes on the ground surface to respectively reach a fault upper disc 31 and a fault lower disc 32 near a fault surface 33 and the fault surface 33;
thirdly, filling a proper amount of explosive into the bottom of the explosive-filled drill hole 35 of the fault plane 33 and blasting to release stress of stress concentration at the fault plane 33;
fourthly, after the high stress of the fault surface 33 is relieved, a high-pressure metal water injection pipe 42 is arranged in the high-pressure water injection drill holes 34 of the upper fault disc 31 and the lower fault disc 32 for high-pressure water injection, and high-pressure water fracturing is carried out on the coal seam 3 of the upper fault disc 31 and the lower fault disc 32, so that the coal seam 3 in the stress concentration area further releases the stress;
fifthly, in the water injection process, if the water in the metal water injection pipe 42 enters the coal body and then the water pressure is not released from the side wall of the high-pressure water injection drill hole 34 and overflows upwards, the wedge-shaped body 47 in the sealing assembly 45 is compressed upwards to enable the buckle 46 and the side wall of the high-pressure water injection drill hole 34 to be tighter, so that the water pressure is not released, the water pressure is completely used for fracturing the coal seam 3, and the metal water injection pipe 42 at the wedge-shaped body 47 is thickened to enable the water pressure not to leak;
sixthly, in the water injection process, if water is injected into the coal seam 3 from the water tank 41 through the high-pressure water pump 43 and the metal water injection pipe 42, water injection control can be performed through a water stop valve when water leaks;
and seventhly, when the high stress of the coal seam 3 at the position is completely relieved by the high-pressure water injection drill hole 34 and the explosive charging drill hole 35, the coal seam 3 at the fault plane 33 can be safely mined, so that the damage of rock burst caused by stress concentration at the fault plane is avoided.
The working principle and the process of the invention are as follows:
firstly, a detector is used for detecting the specific positions of a fault plane 33 of a coal seam 3 and an upper fault disc 31 and a lower fault disc 32, a borehole is drilled on the ground surface to respectively reach the upper fault disc 31 and the lower fault disc 32 near the fault plane 33 and the fault plane 33, then a proper amount of explosive is filled into the bottom of a charging borehole 35 of the fault plane 33 and blasting is carried out to release stress concentration at the fault plane 33, high-pressure metal water injection pipes 42 are filled into high-pressure water injection boreholes 34 of the upper fault disc 31 and the lower fault disc 32 after high stress of the fault plane 33 is relieved, water is injected into the coal seam 3 from a water tank 41 through the metal water injection pipes 42 by controlling water stop valves 44, so that the coal seam 3 in a stress concentration area is further released, if water in the metal water injection pipes 42 enters a coal body, the water pressure is not released from the side walls of the high-pressure water injection boreholes 34, and when the water overflows upwards, wedge 47 in seal assembly 45 will upwards compress and make buckle 46 and the lateral wall of annotating high pressure water drilling 34 tighter thereby make water pressure not release, make water pressure all be used for the fracturing to coal seam 3, and the metal water injection pipe 42 of wedge 47 department thickens and can make water pressure not reveal, when annotating high pressure water drilling 34 and charge drilling 35 and all accomplish the high stress to coal seam 3 of its position and relieve the time, alright in order to carry out the rock burst harm that the stress concentration of fault department that the safety mining thus avoided leads to in coal seam 3 of fault face 33 department.
The method comprises the steps of blasting charge on the fault surface by drilling holes in the earth surface towards the fault surface of the coal bed, the upper fault plate and the lower fault plate, performing high-pressure water injection and fracturing on the upper fault plate and the lower fault plate to release stress of the fault, mining the coal bed at the fault position after releasing high stress, and playing an important role in preventing and treating fault rock burst; the sealing assembly arranged in the fracturing device can effectively solve the problem that water pressure is released, so that the acting force of the water pressure is maximized and the fracturing is used for fracturing the coal bed; the coal seam high-stress relief device is simple in structure and convenient to operate, high stress relief is completely finished on the coal seam at the drilling position through the three drill holes, safety mining of the coal seam at a fault is facilitated, and therefore rock burst hazard caused by stress concentration at the fault is avoided, and the prevention and treatment effect is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A fault rock burst control system is characterized in that: comprises a surface soil layer (1), a rock layer (2), a coal layer (3) and a high-pressure water injection system (4);
the surface soil layer (1) is located on the upper portion of the rock layer (2), a coal bed (3) is arranged in the middle of the rock layer (2), the coal bed (3) comprises an upper fault disc (31), a lower fault disc (32) and a fault plane (33), the fault plane (33) is arranged between the upper fault disc (31) and the lower fault disc (32), explosive charge drill holes (35) are formed in the fault plane (33), high-pressure water injection drill holes (34) are formed in the upper fault disc (31) and the lower fault disc (32), and the high-pressure water injection system (4) is inserted into the coal bed (3) through the high-pressure water injection drill holes (34);
high pressure water injection system (4) include water tank (41), metal water injection pipe (42), high pressure water pump (43), stagnant water valve (44) and seal assembly (45), metal water injection pipe (42) one end is connected on the delivery port of water tank (41), the other end has connected gradually high pressure water pump (43), stagnant water valve (44) and seal assembly (45), seal assembly (45) fixed connection at metal water injection pipe (42) with annotate between the lateral wall of high pressure water drilling (34), seal assembly (45) are including buckle (46) and wedge (47), buckle (46) joint is fixed on foraminiferous wedge (47).
2. A system for controlling fault rock burst according to claim 1, wherein: one section of the metal water injection pipe (42) positioned in the wedge-shaped body (47) is a water injection pipe thickening section (48).
3. A system for controlling fault rock burst according to claim 1, wherein: the tail end of the metal water injection pipe (42) is uniformly provided with water outlet holes (49).
4. A system for controlling fault rock burst according to claim 1, wherein: the buckle (46) is an elastic component.
5. A system for controlling fault rock burst according to claim 1, wherein: the wedge-shaped body (47) is provided with a clearance hole (50) which is matched and connected with the metal water injection pipe (42).
6. A method for preventing and controlling a fault rock burst prevention and control system is characterized by comprising the following steps: stress release is carried out through stress concentration, and the coal seam at the fault position after high stress release is mined, and the method specifically comprises the following steps:
the method comprises the following steps that firstly, a fault face (33) of a coal seam, and specific positions of a fault upper disc (31) and a fault lower disc (32) are ascertained;
secondly, drilling holes on the ground surface to reach a fault upper disc (31) and a fault lower disc (32) near a fault surface (33) and the fault surface (33) respectively;
thirdly, filling a proper amount of explosive into the bottom of the explosive-filled drill hole (35) of the fault surface (33) and blasting to release stress of stress concentration at the fault surface (33);
fourthly, after the high stress of the fault surface (33) is relieved, a high-pressure metal water injection pipe (42) is arranged in a high-pressure water injection hole (34) of the upper fault disc (31) and the lower fault disc (32) for high-pressure water injection, and high-pressure water fracturing is carried out on the coal seam (3) of the upper fault disc (31) and the lower fault disc (32), so that the coal seam (3) in the stress concentration area further releases the stress;
fifthly, in the water injection process, if water in the metal water injection pipe (42) enters the coal body and then the water pressure is not released from the side wall of the high-pressure water injection drill hole (34) and the water overflows upwards, the wedge-shaped body (47) in the sealing assembly (45) is compressed upwards to enable the buckle (46) and the side wall of the high-pressure water injection drill hole (34) to be tightened more so that the water pressure is not released, the water pressure is enabled to be fully used for fracturing the coal seam (3), and the metal water injection pipe (42) at the wedge-shaped body (47) is thickened so that the water pressure is not leaked;
sixthly, in the water injection process, if water is injected into the coal seam (3) from the water tank (41) through the high-pressure water pump (43) and the metal water injection pipe (42), water injection control can be performed through the water stop valve (44) when water leaks;
and seventhly, when the high stress relief of the coal seam (3) at the position is completed by the high-pressure water injection drill hole (34) and the explosive charging drill hole (35), the coal seam (3) at the fault face (33) can be safely mined, so that the damage of rock burst caused by stress concentration at the fault is avoided.
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| CN202110963957.6A CN113847030B (en) | 2021-08-21 | 2021-08-21 | System and method for preventing and controlling fault rock burst |
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| CN202110963957.6A CN113847030B (en) | 2021-08-21 | 2021-08-21 | System and method for preventing and controlling fault rock burst |
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| CN113847030B (en) | 2024-06-07 |
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