CN115788435A - System and method for preventing rock burst in coal mine from up and down in three-dimensional manner - Google Patents
System and method for preventing rock burst in coal mine from up and down in three-dimensional manner Download PDFInfo
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Abstract
The invention discloses a system for preventing rock burst in an up-and-down stereoscopic manner of a coal mine, which comprises a plurality of ground micro-seismic monitoring devices arranged on the ground, a plurality of underground micro-seismic monitoring devices arranged on an underground mining working surface, a ground sound monitoring device, a stress monitoring device and a mine pressure monitoring device, wherein the ground micro-seismic monitoring devices, the ground sound monitoring device, the stress monitoring device and the mine pressure monitoring device are all connected with a comprehensive early warning platform arranged on the ground. The invention also discloses a method for preventing rock burst in a coal mine from up and down in a three-dimensional manner, which realizes the three-dimensional weakening of the areas of low-position, middle-position and high-position hard roofs by constructing an L-shaped horizontal well, directionally drilling a long roof for hydraulic fracturing and presplitting blasting on the roof in a rock stratum; the aim of the underground cooperative pressure relief is achieved by pressure relief measures such as large-diameter pressure relief and coal seam blasting in coal roadway construction. The system and the method disclosed by the invention can realize advanced, regional and source control on rock burst on the basis of improving the rock burst monitoring precision, and greatly improve the pressure relief effect.
Description
Technical Field
The invention belongs to the technical field of deep mine coal mining, and particularly relates to a system for three-dimensionally preventing rock burst of an upper coal mine and a lower coal mine.
Background
Rock burst is one of the main disasters faced in coal mining of deep mines, and immeasurable loss is caused to mines and personnel. However, for deep rock burst mines, the treatment difficulty is often high, the conventional measures such as large-diameter pressure relief and coal bed blasting adopted at present are difficult to effectively reduce the deep mine impact risk, and the underground conventional rock burst monitoring device is difficult to monitor the activity condition of a high-position rock stratum.
Disclosure of Invention
The invention aims to provide a system for three-dimensional rock burst prevention and treatment of an upper layer and a lower layer of a coal mine, and the other purpose of the invention is to provide a method for three-dimensional rock burst prevention and treatment of an upper layer and a lower layer of a coal mine.
The technical scheme includes that the system for preventing and treating rock burst in an up-and-down stereoscopic manner for the coal mine comprises a plurality of ground micro-seismic monitoring devices arranged on the ground, and a plurality of underground micro-seismic monitoring devices, a ground sound monitoring device, a stress monitoring device and a mine pressure monitoring device arranged on an underground mining working surface, wherein the ground micro-seismic monitoring devices, the underground micro-seismic monitoring devices, the ground sound monitoring devices, the stress monitoring devices and the mine pressure monitoring devices are all connected with a comprehensive early warning platform arranged on the ground.
The invention is also characterized in that:
the distance between the microseismic probes of two adjacent underground microseismic monitoring devices is 500-1000 m, the distance between the geophones of two adjacent geophones is not more than 100m, and the distance between the stress sensors of two adjacent stress monitoring devices is not more than 30m.
The other technical scheme adopted by the invention is as follows:
the method for preventing rock burst in an up-and-down stereoscopic manner of a coal mine is used for monitoring the effects generated by various construction measures in real time in the construction process and adjusting construction process parameters according to the monitoring result, and specifically comprises the following steps:
step 1, constructing an L-shaped horizontal well on the ground to perform ground hydraulic fracturing, and detecting the coal and rock stratum fracture development condition in the fracturing period by using a ground micro-seismic monitoring device, an underground micro-seismic monitoring device and a ground sound monitoring device;
and 4, taking measures of large-diameter pressure relief and local pressure relief of coal bed blasting in the underground coal bed, monitoring the change conditions of micro-seismic and earthquake sound events before and after the pressure relief of the coal rock mass by using an underground micro-seismic monitoring device and an earthquake sound monitoring device in the pressure relief process, and monitoring the stress change condition of the relieved coal mass by using a stress monitoring device.
The other technical scheme of the invention is also characterized in that:
the step 1 specifically comprises the following steps:
step 1.1, determining a fracturing horizon according to a mine geological comprehensive histogram, a micro-seismic event seismic source position, three-zone observation of an adjacent stope face and a key layer theory;
step 1.2, arranging more than three ground microseismic monitoring devices in advance in a range of 2 km-3 km in a ground fracturing roadway, and arranging two microseismic probes and two ground sound probes on two gate roads of an underground coal face corresponding to a ground drilling field respectively for detecting the coal rock stratum fracture development condition during the fracturing of a ground horizontal well;
step 1.3, constructing an L-shaped horizontal well on the ground, constructing a first open well, sleeving a sleeve after the construction, reinforcing a wellhead, immediately constructing a second open well, constructing to a position 30-100 m above a fracturing layer, stopping drilling, and starting deflecting;
step 1.4, adopting an orienting device to horizontally drill at a fracturing layer, withdrawing a drill rod after drilling to a target position, installing a perforating bullet, carrying out projectile work, and ejecting 4-6 clusters of perforations in a rock stratum;
and 1.5, putting a packer or a bridge plug in the horizontal well, and injecting high-pressure water into the two-stage packer or bridge plug to perform retreating type fracturing.
In the fracturing process of the step 1.5, the fracturing subsection distance is not more than 50m, and the fracturing flow is not less than 10m 3 And/min, injecting fracture propping agent continuously in the fracturing process.
In the step 2, before hydraulic fracturing of the directional long drill hole of the construction roof, two ground sound probes are required to be arranged in a fracturing influence range of a construction roadway, coal body stress meters are arranged at intervals of 20-30 m and used for monitoring the activity of coal body micro cracks and the stress change condition of the coal body during fracturing, and four or more underground micro-seismic probes are arranged in a diameter range of 1000m of the construction borehole and used for monitoring the fracture condition of the roof during roof fracturing.
The specific construction process of the step 2 is as follows:
step 2.1, determining a fracturing target rock stratum through calculation according to the mine geological comprehensive histogram and the microseismic event horizon;
2.2, moving the directional drilling machine and constructing a directional long drill hole of the top plate by matching with the directional drilling device;
and 2.3, performing retreating type fracturing in the directional long drill hole of the top plate.
The specific construction process of the directional long drilling of the top plate in the step 2.2 is as follows: and drilling holes by adopting a phi 96mm drill bit, withdrawing a drill rod after the rock with the top plate reaches 5m, reaming by using a phi 153mm drill bit, lowering a phi 108mm sleeve, reinforcing and protecting the wall of the fractured hole, and directionally drilling to a specified depth by adopting the phi 96mm drill bit, a phi 73mm screw motor, a measurement while drilling device and a phi 73mm drill rod after hole fixing.
The step 3 specifically comprises the following steps: firstly, arranging ground microseismic probes on the ground corresponding to an underground mining face, specifically arranging four or more ground microseismic probes in a diameter range of 1000m in a construction area for monitoring the breakage condition of a roof; and then constructing a roof deep hole directional blast hole, wherein the hole diameter is 75mm, the hole depth is the distance from the bottom of a vertical crack generated by fracturing of the roof directional long drill Kong Shuili in the step 2 to the top plate of the roadway, a phi 60mm quilt cover explosive is adopted, the explosive quantity is determined according to the lithology and the hole depth of the roof, and the hole sealing length is not less than 1/3 of the hole depth.
In step 4, before large-diameter pressure relief and coal seam blasting are constructed, four or more underground micro-seismic probes are arranged in a radius range of 1000m in a construction area, and two or more ground sound probes are arranged in a range of 200m in the construction area, and are used for monitoring the change conditions of micro-seismic and ground sound events before and after pressure relief of a coal rock body; and arranging coal body stress meters at intervals of 20-30 m in the range of 100m of the construction area for monitoring the stress change condition of the pressure-relief coal body.
The invention has the beneficial effects that:
(1) According to the system for three-dimensionally preventing and controlling rock burst in the coal mine, the vertical error of a micro-seismic event can be effectively reduced and the positioning accuracy is improved by adopting the monitoring device combining the ground micro-seismic monitoring device with the underground micro-seismic, ground sound, stress, ore pressure monitoring devices and the like;
(2) The method for preventing and treating rock burst in the vertical direction of the coal mine can realize advanced, regional and source control of rock burst and greatly improve the pressure relief effect by adopting pressure relief measures of combining staged fracturing of a horizontal well on the ground and directional long drilling hydraulic fracturing of an underground top plate, top plate presplitting blasting, coal bed blasting, large-diameter drilling and the like.
Drawings
FIG. 1 is a schematic diagram of the arrangement of the ground microseismic monitoring devices in the system of the present invention;
FIG. 2 is a schematic diagram of the arrangement of various downhole rock burst monitoring devices in the system of the present invention;
FIG. 3 is a schematic diagram of the arrangement of various downhole rock burst monitoring devices in the system of the present invention;
fig. 4 is a schematic representation of the measures taken in the method according to the invention for different hard top plates.
In the figure, 1, a ground micro-seismic monitoring device, 2, a stress monitoring device, 3, a downhole micro-seismic monitoring device, 4, a ground sound monitoring device, 5.L type horizontal wells, 6, a top plate directional long drill hole, 7, a top plate deep hole directional blasting hole, 8, a coal seam large-diameter pressure relief hole or a coal seam blasting hole, 9, a mine pressure monitoring device, 10, the ground, 11, a high-position hard top plate, 12, a middle-position hard top plate, 13, a low-position hard top plate and 14.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The system for preventing rock burst in a coal mine vertically and stereoscopically is an underground and underground combined monitoring system, and comprises a plurality of ground micro-seismic monitoring devices 1 arranged on the ground, a plurality of underground micro-seismic monitoring devices 3 arranged on an underground mining working surface, a ground sound monitoring device 4, a stress monitoring device 2 and a mine pressure monitoring device 9, wherein the arrangement modes of the various monitoring devices are shown in figures 1-3.
The ground microseismic monitoring device 1 is specifically arranged according to a mine panel mining plan, and requires a ground platform network to record microseismic events of more than 100J in a production activity area. The ground microseismic monitoring device 1 of the present invention is arranged as shown in fig. 1.
The underground micro-seismic monitoring device 3 in various underground monitoring devices is compatible with the ground micro-seismic monitoring device 1, the underground micro-seismic monitoring device 3 must cover the whole mine, and the ground sound monitoring device 4, the stress monitoring device 2 and the mine pressure monitoring device 9 are arranged according to the mine excavation current situation and the industry standard 'rock burst determination, monitoring and control method' (GB/T25217). The underground microseismic monitoring device 3 mainly monitors energy events with energy more than 100J and frequency of 0.1 Hz-150 Hz, and requires the distance between microseismic probes to be 500 m-1000 m; the ground sound monitoring device 4 mainly monitors energy events with energy less than 100J and frequency more than 150Hz, and the distance between ground sound probes is required to be not more than 100m; the stress monitoring device 2 is mainly used for monitoring the stress in a coal rock body of a mining working face, the distance between adjacent stress sensors is required to be not more than 30m, and the far-field dynamic load, the near-field dynamic load and the static load are respectively used for monitoring the dynamic load and the static load required by rock burst starting.
Ground microseism monitoring devices 1 and the downhole microseism monitoring devices 3 in pit, the ground sound monitoring devices 4, stress monitoring devices 2 and mine pressure monitoring devices 9 are all connected to the comprehensive early warning platform that sets up in ground, the data of various monitoring devices all sends to this platform, the platform utilizes visual technique, can demonstrate stress cloud chart directly perceivedly, microseism time microseism, frequency change etc., realize to the microseism, the ground sound, many parameters such as stress and mine pressure, the degree of depth development and the integration of multiscale early warning information, for accurate evaluation release effect.
The method for preventing rock burst of coal mine from up and down in three-dimensional mode includes, as shown in fig. 4, taking staged fracturing measures of a horizontal well on the ground on a high-position hard top plate 11, taking fracturing measures of a directional long drill Kong Shuili on a middle-position hard top plate 12, taking top plate presplitting blasting measures on a low-position hard top plate 13, and taking large-diameter drilling pressure relief and coal bed blasting pressure relief measures on a coal bed 14 to realize an up-and-down cooperative pressure relief and impact prevention system for covering high, middle and low-position hard rock strata and coal beds. The method comprises the following specific steps:
step 1, weakening a high-position hard top plate 11 before tunneling on a working face. The high-position hard top plate 11 with the coal seam roof more than 60m is weakened by constructing an L-shaped horizontal well 5 on the ground 10 to perform ground hydraulic fracturing. In the process, a ground micro-seismic monitoring device 1, an underground micro-seismic monitoring device 3 and a ground sound monitoring device 4 are used for detecting the coal rock stratum fracture development condition in the fracturing period. The specific process is as follows:
step 1.1, determining a fracturing horizon according to a mine geological comprehensive histogram, a micro-seismic event seismic source position, three-zone observation of an adjacent stope face and a key layer theory;
step 1.2, arranging more than three ground microseismic monitoring devices 1 in advance within the range of 2 km-3 km of a ground fracturing roadway, and arranging two microseismic probes and two ground sound probes respectively on two gate roads of an underground coal mining working face corresponding to a ground drilling field for detecting the development condition of a coal rock stratum fracture during the fracturing of a horizontal well on the ground;
step 1.3, constructing an L-shaped horizontal well 5 on the ground, constructing a first open well, sleeving the first open well after the construction, reinforcing a well mouth, immediately constructing a second open well, constructing to a position 30-100 m above a fracturing layer, stopping drilling, and starting deflecting;
step 1.4, adopting an orienting device to horizontally drill at a fracturing layer, withdrawing a drill rod after drilling to a target position, installing a perforating bullet, carrying out projectile work, and ejecting 4-6 clusters of perforations in a rock stratum in advance according to a certain angle, so that the direction and the depth of a crack can be manually controlled in the rock stratum in advance, energy consumed during rock breaking by high-pressure water can be avoided, only fracturing in a projectile hole is needed, and the fracturing effect is further enhanced;
and 1.5, putting a packer or a bridge plug in the horizontal well, and injecting high-pressure water into the two-stage packer or the bridge plug for fracturing. The fracturing subsection distance is not more than 50m, and the fracturing flow is not less than 10m 3 And/min, continuously injecting fracture propping agents such as fracturing fluid, fine sand and the like in the fracturing process, and ensuring the effect after fracturing. The whole fracturing is carried out in a retreating mode.
And 2, weakening a middle hard top plate 12 before stoping of the working face. The directional long drill holes 6 of the roof are constructed in the underground roadway, and hydraulic fracturing is carried out to weaken the middle hard roof 12 above the coal seam roof 40 m. Before hydraulic fracturing of a directional long drill hole of a construction roof, two ground sound probes are required to be arranged in a fracturing influence range of a construction roadway, coal body stressometers are arranged at intervals of 20-30 m and used for monitoring coal body micro-crack activities and coal body stress change conditions during fracturing, and four or more underground micro-seismic probes are arranged in a diameter range of 1000m of the construction borehole and used for monitoring the roof fracture conditions during roof fracturing. The specific construction process is as follows:
and 2.1, determining a stratum fracturing layer. Determining a fracturing target rock stratum through calculation according to the mine geological comprehensive histogram and the microseismic event layer;
and 2.2, constructing the directional long drill hole 6 of the top plate. And moving the directional drilling machine and constructing a directional long drill hole by matching with the directional drilling device. Specifically, a drill bit with the diameter of 96mm is adopted for drilling, a drill rod is withdrawn after the rock with the diameter of 5m on the top plate, the drill bit with the diameter of 153mm is used for reaming, and a sleeve with the diameter of 108mm is arranged for reinforcing and protecting the wall of the hole of the fracturing hole. After hole fixing, directionally drilling to a specified depth by adopting a phi 96mm drill bit, a phi 73mm screw motor, a measurement while drilling device and a phi 73mm drill rod;
and 2.3, performing retreating type fracturing in the directional long drill hole 6 of the top plate, wherein the subsection spacing is about 30m, and the fracturing fluid is selected from clear water without adding an active agent and a flame retardant.
And 3, weakening the low-position hard top plate 13 during the working face extraction period. The low-level hard roof 13 in the range of 10 m-40 m of the coal seam roof is weakened by roof pre-splitting blasting in the underground roadway. Before pre-splitting blasting of a construction roof, a ground micro-seismic probe needs to be arranged on the ground corresponding to an underground mining face, specifically, four or more ground micro-seismic probes are arranged in the diameter range of 1000m in a construction area and used for monitoring the roof breakage condition. And (3) designing a deep hole directional blasting hole 7 of the construction roof, wherein the hole diameter is 75mm, and the hole depth is the distance from the bottom of a vertical crack generated by fracturing of the roof directional long drill Kong Shuili in the step 2 to the roof of the roadway. Using a phi 60mm passive cartridge explosive, the specifications of the explosives used in this example were: each roll of explosive has the length of 350mm and the weight of 1.1kg per roll. The explosive amount is determined according to the lithology and the hole depth of the top plate, and the hole sealing length is not less than 1/3 of the hole depth.
And 4, adopting local pressure relief measures such as large-diameter pressure relief, coal seam blasting and the like in the underground coal seam 14, and constructing large-diameter pressure relief holes or coal seam blasting holes 8 of the coal seam to transfer high stress to the deep part of the roadway and reduce the impact risk of the mining working face. Before large-diameter pressure relief and coal bed blasting are constructed, four or more underground micro-seismic probes are required to be arranged in a radius range of 1000m in a construction area, and two or more ground sound probes are required to be arranged in a range of 200m in the construction area, so that the change conditions of micro-seismic and ground sound events before and after pressure relief of a coal rock body are monitored; and arranging coal body stress meters at intervals of 20-30 m in the range of 100m of the construction area for monitoring the stress change condition of the pressure-relieved coal body. In the process of constructing large-diameter pressure relief and coal seam blasting, the large-diameter pressure relief holes and the coal seam blasting holes with different hole intervals are constructed in different regions according to the change of the impact danger level of a roadway.
Before various pressure relief projects are implemented, the installation and construction work of various rock burst monitoring devices such as micro-shock, ground sound, stress, mine pressure and the like must be completed, and a rock burst monitoring table network with the combination of an area and a local part and the full coverage of dynamic load and static load is formed. In the construction process of the steps 1-4, the system for preventing rock burst in the vertical direction of the coal mine is adopted to collect data of micro-shock, ground sound and coal body stress change in the pressure relief engineering construction process, the effect generated by each construction measure is monitored in real time so as to accurately evaluate the pressure relief effect, the construction process parameters are adjusted according to the monitoring result, and the system and the method are used for monitoring the rock burst and detecting the anti-impact effect of the mine in real time.
Claims (10)
1. The system for preventing and treating rock burst in the vertical direction of the coal mine is characterized by comprising a plurality of ground micro-seismic monitoring devices (1) arranged on the ground and a plurality of underground micro-seismic monitoring devices (3), a ground sound monitoring device (4), a stress monitoring device (2) and a mine pressure monitoring device (9) arranged on an underground mining working surface, wherein the ground micro-seismic monitoring devices (1), the underground micro-seismic monitoring devices (3), the ground sound monitoring device (4), the stress monitoring device (2) and the mine pressure monitoring device (9) are all connected with a comprehensive early warning platform arranged on the ground.
2. The system for preventing rock burst in an up-and-down stereoscopic manner of a coal mine according to claim 1, wherein the distance between the microseismic probes of two adjacent underground microseismic monitoring devices (3) is 500 m-1000 m, the distance between the geophones of two adjacent geophones (4) is not more than 100m, and the distance between the stress sensors of two adjacent stress monitoring devices (2) is not more than 30m.
3. The method for preventing rock burst in a coal mine from top to bottom in a three-dimensional manner is characterized in that the system of claim 2 is used for monitoring the effects of various construction measures in real time in the construction process, and the construction process parameters are adjusted according to the monitoring result, and the method specifically comprises the following steps:
step 1, constructing an L-shaped horizontal well (5) on the ground (10) to perform ground hydraulic fracturing, and detecting the coal and rock stratum fracture development condition in the fracturing period by using a ground micro-seismic monitoring device (1), an underground micro-seismic monitoring device (3) and a ground sound monitoring device (4);
step 2, adopting a roof directional long drill Kong Shuili fracturing measure on a middle position hard roof (12) of a coal face, monitoring the activity of coal body micro cracks and the stress change condition of the coal body during fracturing by using a ground sound monitoring device (4) and a stress monitoring device (2) in the process, and monitoring the roof fracture condition during roof fracturing by using an underground micro-seismic monitoring device (3);
step 3, adopting a top plate pre-splitting blasting measure on the low-position hard top plate (13), and monitoring the top plate breakage condition by using the ground micro-seismic monitoring device (1) in the blasting process;
and 4, taking measures of large-diameter pressure relief and local pressure relief of coal bed blasting in the underground coal bed (14), monitoring the change conditions of micro-seismic events and ground sound events before and after the pressure relief of the coal rock body by using an underground micro-seismic monitoring device (3) and a ground sound monitoring device (4) in the pressure relief process, and monitoring the stress change condition of the pressure relief coal body by using a stress monitoring device (2).
4. The method for preventing rock burst in coal mine underground and stereoscopic manners according to claim 3, wherein the step 1 is specifically as follows:
step 1.1, determining a fracturing horizon according to a mine geological comprehensive histogram, a micro-seismic event seismic source position, three-zone observation of an adjacent stope face and a key layer theory;
step 1.2, arranging more than three ground microseismic monitoring devices (1) in advance within the range of 2 km-3 km of a ground fracturing roadway, and arranging two microseismic probes and two ground sound probes on two gate roads of an underground coal mining working face corresponding to a ground drilling field respectively for detecting the coal rock stratum fracture development condition during the fracturing of a ground horizontal well;
step 1.3, constructing an L-shaped horizontal well (5) on the ground, constructing a first open well, sleeving the first open well after the construction, reinforcing a wellhead, immediately constructing a second open well, stopping drilling when the construction is carried out to a position 30-100 m above a fracturing layer, and starting deflecting;
step 1.4, adopting an orienting device to horizontally drill at a fracturing layer, withdrawing a drill rod after drilling to a target position, installing a perforating bullet, carrying out projectile work, and ejecting 4-6 clusters of perforations in a rock stratum;
and 1.5, putting a packer or a bridge plug in the horizontal well, and injecting high-pressure water into the two-stage packer or bridge plug to perform retreating type fracturing.
5. The method for preventing rock burst in coal mine underground and stereoscopic manner according to claim 4, wherein in the fracturing process of step 1.5, the fracturing segmentation distance is not more than 50m, and the fracturing flow is not less than 10m 3 And/min, injecting fracture proppant in the fracturing process.
6. The method for preventing rock burst in an up-and-down stereoscopic manner of a coal mine according to claim 3, wherein in the step 2, before hydraulic fracturing of directional long drill holes of a construction roof, two ground sound probes are arranged in a fracturing influence range of a construction roadway, coal body stress meters are arranged at intervals of 20 m-30 m and used for monitoring the activity of micro cracks of coal bodies and the stress change condition of the coal bodies during fracturing, and four or more underground micro-seismic probes are arranged in a diameter range of 1000m of the construction borehole and used for monitoring the fracture condition of the roof during fracturing of the roof.
7. The method for preventing rock burst in coal mine underground and stereoscopic manner according to claim 6, wherein the concrete construction process of the step 2 is as follows:
step 2.1, determining a fracturing target rock stratum through calculation according to the mine geological comprehensive histogram and the microseismic event horizon;
2.2, moving the directional drilling machine and constructing a directional long drill hole (6) of the top plate by matching with the directional drilling device;
and 2.3, performing retreating type fracturing in the directional long drill hole (6) of the top plate.
8. The method for preventing rock burst in coal mine underground and stereoscopic manner according to claim 7, wherein the concrete construction process of the directional long hole (6) of the top plate in the step 2.2 is as follows: and drilling holes by adopting a phi 96mm drill bit, withdrawing a drill rod after the rock with the top plate is 5m, reaming by using a phi 153mm drill bit, withdrawing a phi 108mm sleeve, reinforcing and protecting the wall of the fractured hole, and directionally drilling to a specified depth by adopting the phi 96mm drill bit, the phi 73mm screw motor, a measurement while drilling device and the phi 73mm drill rod after the hole is fixed.
9. The method for preventing rock burst in coal mine underground and stereoscopic manners according to claim 3, wherein the step 3 is specifically as follows: firstly, arranging ground microseismic probes on the ground corresponding to an underground mining face, specifically arranging four or more ground microseismic probes in a diameter range of 1000m in a construction area for monitoring the breakage condition of a roof; and then constructing a top plate deep hole directional blast hole (7), wherein the hole diameter is 75mm, the hole depth is the distance from the bottom of a vertical crack generated by the top plate directional long drill Kong Shuili fracturing in the step 2 to the top plate of the roadway, a phi 60mm quilt cover explosive is adopted, the explosive quantity is determined according to the lithology and the hole depth of the top plate, and the hole sealing length is not less than 1/3 of the hole depth.
10. The method for vertically preventing and treating rock burst in a coal mine according to claim 3, wherein in step 4, four or more underground microseismic probes are arranged in a radius range of 1000m in a construction area and two or more ground sound probes are arranged in a radius range of 200m in the construction area before large-diameter pressure relief and coal bed blasting are constructed, and are used for monitoring the change conditions of microseismic events and ground sound events before and after pressure relief of a coal rock body; and arranging coal body stress meters at intervals of 20-30 m in the range of 100m of the construction area for monitoring the stress change condition of the pressure-relief coal body.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116591777A (en) * | 2023-05-16 | 2023-08-15 | 中国矿业大学 | Multi-field multi-source information fusion rock burst intelligent monitoring and early warning device and method |
| CN116717227A (en) * | 2023-08-07 | 2023-09-08 | 中煤科工西安研究院(集团)有限公司 | Underground directional long-borehole hydraulic fracturing method for underground combined coal mine |
| CN117027802A (en) * | 2023-08-15 | 2023-11-10 | 河南理工大学 | Method for preventing and controlling coal mine rock burst in advance in ground horizontal well segmented fracturing area |
| CN117027802B (en) * | 2023-08-15 | 2024-04-23 | 河南理工大学 | Method for preventing and controlling coal mine rock burst in advance in ground horizontal well segmented fracturing area |
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2022
- 2022-11-30 CN CN202211540093.8A patent/CN115788435A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116591777A (en) * | 2023-05-16 | 2023-08-15 | 中国矿业大学 | Multi-field multi-source information fusion rock burst intelligent monitoring and early warning device and method |
| CN116591777B (en) * | 2023-05-16 | 2023-10-24 | 中国矿业大学 | Multi-field multi-source information fusion rock burst intelligent monitoring and early warning device and method |
| CN116717227A (en) * | 2023-08-07 | 2023-09-08 | 中煤科工西安研究院(集团)有限公司 | Underground directional long-borehole hydraulic fracturing method for underground combined coal mine |
| CN116717227B (en) * | 2023-08-07 | 2023-11-17 | 中煤科工西安研究院(集团)有限公司 | Underground directional long-borehole hydraulic fracturing method for underground combined coal mine |
| CN117027802A (en) * | 2023-08-15 | 2023-11-10 | 河南理工大学 | Method for preventing and controlling coal mine rock burst in advance in ground horizontal well segmented fracturing area |
| CN117027802B (en) * | 2023-08-15 | 2024-04-23 | 河南理工大学 | Method for preventing and controlling coal mine rock burst in advance in ground horizontal well segmented fracturing area |
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