CN111894586A - Rock burst treatment method - Google Patents
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- CN111894586A CN111894586A CN202010685131.3A CN202010685131A CN111894586A CN 111894586 A CN111894586 A CN 111894586A CN 202010685131 A CN202010685131 A CN 202010685131A CN 111894586 A CN111894586 A CN 111894586A
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- 239000011435 rock Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003245 coal Substances 0.000 claims abstract description 49
- 238000005553 drilling Methods 0.000 claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000005422 blasting Methods 0.000 claims description 43
- 238000005065 mining Methods 0.000 claims description 28
- 239000002360 explosive Substances 0.000 claims description 22
- 238000007726 management method Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 12
- 238000005474 detonation Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000008093 supporting effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001266 bandaging Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 208000028399 Critical Illness Diseases 0.000 claims 1
- 230000000740 bleeding effect Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000023597 hemostasis Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 230000008092 positive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000009423 ventilation Methods 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
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
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Abstract
The invention belongs to the field of rock burst treatment methods, and particularly relates to a rock burst treatment method, which comprises the following steps of prevention and treatment measures of rock burst and management and operation methods of a rock burst technology, wherein the prevention and treatment measures of the rock burst treatment method are as follows: and S1, after the working face is produced, drilling and pressure relief work is carried out on the coal seam in advance of 200m of the upper and lower drifts. The overall treatment method is reasonable, particularly when the reduction of area of the drift is more than 70%, the roadway should be reinforced and supported in time, the upper and lower drift supports should be reliable, the phenomena of broken net and lost anchor should be handled in time, the pillars should be tied with full fall-proof ropes, the pillars are fixedly connected by a triangular stabilizing frame, a top beam is hung on a top net by a No. 8 iron wire, the upper and lower drifts are advanced by 80m, so that a firmer support framework can be formed between the pillars when the rock burst occurs, and the connected triangular supports are arranged, so that the stability and the protection performance are better.
Description
Technical Field
The invention belongs to the field of rock burst treatment methods, and particularly relates to a rock burst treatment method.
Background
Statistics show that the larger the mining depth is, the higher the possibility of occurrence of rock burst is, generally no rock burst occurs at the depth of 350m or less, the danger of the rock burst increases gradually to a certain extent at 350m to 500m, from 500m, the impact risk increases sharply with the increase of the mining depth, the depth of the rock burst occurring for the first time in large mines in China is 200m to 600m, rock burst occurs at 300m depth in the compliant pit, slight rock burst occurs at the level of-225 m in the tiger bench mine, destructive rock burst occurs at the level of-580 m, therefore, the rock burst is directly influenced by the mining depth, a structural stress field of residual stress when a part of crustal shell moves exists in the geological structural zone, structural zones such as faults, buckling and local abnormalities (phenomena of raised bottom plate, sunken top plate, branched coal bed, thinned and thickened coal bed and the like) and the like exist in the coal mine, and most of the structural stress fields are stored in the geological structural zone by elastic energy, therefore, the rock burst often occurs in the areas where the tectonic stress is concentrated, and the tectonic stress field of the geologic tectonic zone accumulates huge elastic deformation energy, so that the rock burst is easily generated at the north pole of the roadway and the working face nearby the rock burst.
Corresponding prevention measures exist in the field of rock burst prevention and control at present, but the prevention measures have the major defect in roadway arrangement, the roadway reinforcing and supporting system is loose, all supports cannot be connected into a whole, the whole roadway is prone to collapse and harm when rock burst occurs locally, and therefore the stability performance of the roadway is extremely poor.
Disclosure of Invention
Aiming at the problems, the invention provides a rock burst treatment method.
In order to achieve the above object, the technical solution adopted by the present invention is that the present invention provides a rock burst management method, which is characterized in that the rock burst management method comprises a rock burst control measure and a rock burst technology management and operation method, and the rock burst control measure is divided into the following steps:
s1, after the working face is produced, drilling and pressure relief work is carried out on the upper and lower drifts by 200m in advance, and the drilling and pressure relief range is always controlled to be beyond the influence range of the advance pressure of the working face;
s2, drilling a deep hole every 10 m at the position of 1.5m from the upper coal wall of the upper roadway to the top plate, performing pressure relief blasting, and driving the blast hole into the upper coal wall at 13 degrees, wherein the depth of the hole is 15 m; drilling deep holes every 5m at the position of 1 m and the left and the right of the upper coal wall and the top plate in the upper roadway, performing pressure relief blasting, driving the blast holes at a downward binding angle of not less than 13 degrees and 15 m in depth, drilling deep holes every 5m at the position of 1.5m and the left and the right of the upper coal wall and the top plate in the lower roadway, performing pressure relief blasting, driving the blast holes and the upper coal wall at 13 degrees and 15 m in depth, reinforcing nearby supports before drilling, enabling drilling personnel to be matched with each other consistently, propelling at a constant speed, and discharging coal (rock) powder in time;
s3, after the blast holes are drilled, charging, connecting and blasting one by one, wherein the charge amount of each hole is 40 sections; the first explosive cartridge is arranged 4 meters away from the eye ground, the second explosive cartridge is arranged 7 meters away from the eye ground, each cartridge in the eyes must be pressed, the hole sealing length of the stemming in the eyes is not less than 4 meters, in order to ensure the complete detonation of explosive charges in the blastholes, the blastholes are charged in a continuous coupling mode, double detonators are used for detonation, 2 detonators are connected in parallel, and each eye is independently detonated in the forward direction;
and S4, immediately blasting and relieving pressure on the impact danger area of the working face after the electromagnetic radiation instrument monitors the impact danger, wherein the drill holes are arranged in a mode that when the drill holes are arranged on the upper drift lower side, the depression angles of the drill holes are obliquely and downwards arranged along the coal seam, the distance between the hole openings and the top plate is 1.0m, when the drill holes are arranged on the upper drift upper side or the lower drift upper side, the elevation angles of the drill holes are obliquely and upwards arranged along the coal seam, the distance between the hole openings and the top plate is 1.5m, the depth of pressure relief holes is 10.
Preferably, in S3, the MFB-100 type initiator is used for blasting, and the number of detonators per one shot is 1. And the distance of the warning line is at least 200m during blasting, the blasting hiding time is not less than 30min, if the coal seam drilled hole is drilled for 12 m smoothly, the pressure relief effect meets the requirement, and if not, the blasting is continued to relieve the pressure.
Preferably, in S3, before protection, the working face must be closed and managed, the number of workers on the working face is controlled, when the shrinkage of the cross section of the drift is greater than 70%, the drift should be reinforced and supported in time, the upper and lower drift supports should be reliable, the phenomena of broken net and lost anchor should be handled in time, the pillars should be tied with full fall-proof ropes, and the pillars are fixedly connected with each other by a triangular stabilizing frame, and a top beam is hung on a top beam by 8 # iron wires, the upper and lower drifts are advanced by 80m, the width of a sidewalk is not less than 0.95m, the height of the drift is not less than 2m, all hoses are used in 100m advance of the drift, idle materials are not stored in 200m advance, idle equipment and cable racks are stored outside 150m advance of the drift, and the roots are fixed on the drift, when an impact risk is detected, a dispatching room and related leaders are reported immediately, and field personnel are informed to evacuate the danger area, and targeted pressure relief work is arranged, so that knowledge guidance and safety awareness education are required to be enhanced for individual worker protection measures.
Preferably, in S4, the explosive is mining emulsion explosive, the explosive loading per hole is 4Kg, 2-shot Bos-second delay electric detonators are used for positive explosive loading initiation, three water stemming are used for each hole, the rest are sealed with yellow mud, single-hole guns are connected in parallel, the guns are connected in series between the holes, and 3-5 pressure relief holes are detonated each time, so as to improve the pressure relief effect.
Preferably, in S2, the blasting mode is selected by changing the coal structure by blasting in the area outside the peak area of the coal support pressure in front of the working face, eliminating or alleviating the condition of forming impact risk, and performing advanced loosening blasting by adopting a deep hole blasting method.
Preferably, the rock burst technology management comprises the steps of identifying coal seam impact tendentiousness of each mined coal seam, carefully making rock burst risk evaluation of a to-be-mined section, compiling a special design for preventing and treating rock burst, evaluating the section to be subjected to rock burst risk, compiling a special design for preventing and treating rock burst according to mining area design and tunneling and coal mining operation rules, adopting a correct mining mode and mining production process, needing a longwall retreat mining method and a full-span type roof management method, scientifically arranging mining sequences, avoiding artificial formation of island and semi-island high-stress concentrated areas, optimizing roadway arrangement, requiring timely exploration of underground conditions after rock burst occurs, generating injured personnel, actively organizing personnel to perform field first aid, performing simple hemostasis and bandaging on slightly injured personnel, and performing simple medical treatment on critically injured personnel, timely organizing the personnel to transport to the ground.
Compared with the prior art, the invention has the advantages and positive effects that,
1. the overall method is reasonable in design, particularly in the optimized roadway arrangement, when the section shrinkage rate of a drift is more than 70%, the roadway should be reinforced and supported in time, the supports of the upper and lower drifts are reliable, the phenomena of net breakage and anchor loss should be handled in time, full-falling-prevention ropes are tied on the pillars, the pillars are fixedly connected by a triangular stabilizing frame, a top beam is hung on a top net by 8-type iron wires, the upper and lower drifts are advanced by 80m, so that a firmer supporting framework can be formed between the pillars when rock burst occurs, and the connected triangular supports are better in stability and protection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of a rock burst control measure of the rock burst management method provided in embodiment 1;
fig. 2 is a flowchart of a rock burst technical management and operation method of the rock burst management method provided in embodiment 1;
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
Embodiment 1, as shown in fig. 1, the invention provides a method for managing and operating a rock burst, which is characterized in that the method for managing and operating a rock burst includes measures for preventing and controlling a rock burst and a method for managing and operating a rock burst technology, the measures for preventing and controlling the method for managing and operating the rock burst are divided into the following steps and corresponding measures, after a working face is produced, drilling and pressure relief work is performed on an upper gallery and a lower gallery in advance by 200m, a drilling and pressure relief range is always controlled to be outside an influence range of the advance pressure of the working face, deep holes are drilled at intervals of 10 m at positions of about 1.5m from a top plate on an upper wall of the upper gallery, pressure relief blasting is performed before blasting, a blasting method is selected before blasting, a coal body structure is changed by a blasting method in a region outside a peak area of coal body supporting pressure in front of the working face, conditions for forming a shock risk are eliminated or slowed down, in order to ensure safety, an unloading protective belt with sufficient width is needed in front of a mining face and around a roadway, when the depth of blasting unloading is selected, the front of a coal face is equal to the width of the protective belt and the progress of the working face, a blasthole is punched into the coal wall on an upper side at 13 degrees, the hole depth is 15 meters, a blasthole is punched at the position, 1 meter away from a top plate, of the coal wall on a lower side of the upper roadway at intervals of 5 meters, pressure relief blasting is carried out, a blasthole is punched at 13 degrees with the coal wall on the upper side at an angle not smaller than 13 degrees and is 15 meters deep, a deep hole is punched at the position, 1.5 meters away from the top plate, of the coal wall on the lower roadway at intervals, pressure relief blasting is carried out, nearby supports are firstly reinforced before punching, punching personnel are matched with each other at a uniform speed, coal (rock) powder is discharged in time, and after the blasthole is punched, the blasthole charging, line connection and blasting are carried out, and the explosive charge per; the first explosive roll is arranged 4 meters away from the ground, the second explosive roll is arranged 7 meters away from the ground, each explosive roll in the eyes must be pressed, the hole sealing length of the stemming in the eyes is not less than 4 meters, in order to ensure the complete detonation of explosive charges in the blastholes, the blastholes are charged in a continuous coupling mode, double detonators are used for detonation, 2 detonators are connected in parallel, each eye is independently detonated in the forward direction, the upper roadway of a working face must be sealed and managed in the early stage of the charging, connecting lines, the blasting and the detonation, the number of produced workers on the working face is controlled, when the section shrinkage of the roadway is more than 70%, the roadway should be reinforced and supported in time, the upper roadway and the lower roadway should be reliably supported, the phenomena of net breaking and anchor losing should be handled in time, the pillars need to be tied to be completely anti-falling ropes, the pillars are fixedly connected by a triangular frame, a top beam is hung on the top net by a No. 8 iron wire, and the upper roadway, the width of a sidewalk is not less than 0.95m, the height of a roadway is not less than 2m, all hoses are used in a roadway with an advance of 100m, idle materials are not stored in a range with an advance of 200m, idle equipment and a cable rack are stored outside the range with an advance of 150m, and are fixed on the roadway side fundamentally, when an impact danger is monitored, a dispatching room and related leaders are reported immediately, field personnel are notified to evacuate a dangerous area, targeted pressure relief work is arranged, for individual worker protection measures, knowledge guidance and safety consciousness education need to be enhanced, when the impact danger is monitored by an electromagnetic radiometer, blasting is carried out on a working face impact danger area immediately, the pressure relief is carried out in a drilling hole arrangement mode that when a drilling hole is arranged at the upper roadway lower side, the depression angle of the drilling hole is arranged downwards along the coal bed in an inclined mode, the hole opening is 1.0m away from the top plate, and when the drilling hole is arranged at the, the distance between the hole opening and the top plate is 1.5m, the depth of the pressure relief hole is 10 m, the distance is 5m, wherein the explosive is used as the mine emulsion explosive, the explosive loading amount of each hole is 4Kg, 2-millimeter second delay electric detonators are used for forward explosive charging and initiation, three water stemming are used for each hole, the rest are sealed by yellow mud, the cannons are connected in parallel in a single hole, the cannons are connected in series between the holes, 3-5 pressure relief holes are detonated each time, and the pressure relief effect is improved.
As shown in figure 2, the rock burst technology management is to identify the coal bed impact tendentiousness of each coal seam to be mined, carefully make the evaluation on the rock burst danger of the section to be mined, compile a special design for preventing and treating the rock burst, evaluate the section with the rock burst danger, compile the special design for preventing and treating the rock burst for the mining area design and the tunneling and coal mining operation rules, adopt a correct mining mode and a mining production process, need to adopt a longwall retreat mining method and a full-span type roof management method, scientifically arrange the mining sequence, avoid the artificial formation of an island and a semi-island high-stress concentrated area, optimize the roadway arrangement, require timely detection of underground conditions after the rock burst occurs, such as the site, the swept range, the ventilation system damage, the gas emission condition and the like of the rock burst accident, and actively organize the personnel to perform field emergency treatment, the simple hemostasis bandaging is carried out on the light wounded personnel, and the personnel are organized and conveyed to the ground in time after the critically wounded personnel are treated by simple medical treatment.
In the active danger relieving of rock burst, in areas where rock burst danger or possible rock burst danger is determined by prediction, danger relieving measures are required to be taken immediately by teams for danger relieving treatment, the danger relieving treatment measures are mainly coal seam pressure relief blasting methods, the distance of avoiding a gun is not less than 150m, the time of avoiding the gun is not less than 40 minutes, danger relieving measures such as coal seam pressure relief blasting and cracking measures are taken for treating sections without coal seam pressure relief blasting and cracking measures, coal seam pressure relief water injection, drilling pressure relief, top plate blasting treatment and the like are adopted, a hard and difficult-to-stride roof plate is also subjected to danger relieving treatment by a forced roof caving method, including top plate presplitting blasting, step roof caving, roof breaking and the like, at places with rock burst danger such as a driving working face and a roadway, danger relieving treatment is carried out by a large-diameter drilling pressure relief method, danger relieving actual effects are checked, and after danger relieving treatment is carried out, actual effects are checked by teams according to effect checking methods and relevant regulations in mining area design and mining operation regulations Effect inspection, at present, two methods, namely an electromagnetic radiation method and a drilling cutting method, are adopted for simultaneous inspection to determine danger relieving effect, through the effect inspection, the rock burst danger is not relieved, production cannot be recovered, corresponding danger relieving measures are required to be adopted for treatment again, personnel irrelevant to danger relieving treatment cannot enter a danger area, and through the effect inspection, after the impact danger is completely contacted, production can be recovered.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (6)
1. The rock burst treatment method is characterized by comprising the measures for preventing and controlling the rock burst and the management and operation method of the rock burst technology, wherein the measures for preventing and controlling the rock burst treatment method are divided into the following steps:
s1, after the working face is produced, drilling and pressure relief work is carried out on the upper and lower drifts by 200m in advance, and the drilling and pressure relief range is always controlled to be beyond the influence range of the advance pressure of the working face;
s2, drilling a deep hole every 10 m at the position of 1.5m from the upper coal wall of the upper roadway to the top plate, performing pressure relief blasting, and driving the blast hole into the upper coal wall at 13 degrees, wherein the depth of the hole is 15 m; drilling deep holes every 5m at the position of 1 m and the left and the right of the upper coal wall and the top plate in the upper roadway, performing pressure relief blasting, driving the blast holes at a downward binding angle of not less than 13 degrees and 15 m in depth, drilling deep holes every 5m at the position of 1.5m and the left and the right of the upper coal wall and the top plate in the lower roadway, performing pressure relief blasting, driving the blast holes and the upper coal wall at 13 degrees and 15 m in depth, reinforcing nearby supports before drilling, enabling drilling personnel to be matched with each other consistently, propelling at a constant speed, and discharging coal (rock) powder in time;
s3, after the blast holes are drilled, charging, connecting and blasting one by one, wherein the charge amount of each hole is 40 sections; the first explosive cartridge is arranged 4 meters away from the eye ground, the second explosive cartridge is arranged 7 meters away from the eye ground, each cartridge in the eyes must be pressed, the hole sealing length of the stemming in the eyes is not less than 4 meters, in order to ensure the complete detonation of explosive charges in the blastholes, the blastholes are charged in a continuous coupling mode, double detonators are used for detonation, 2 detonators are connected in parallel, and each eye is independently detonated in the forward direction;
and S4, immediately blasting and relieving pressure on the impact danger area of the working face after the electromagnetic radiation instrument monitors the impact danger, wherein the drill holes are arranged in a mode that when the drill holes are arranged on the upper drift lower side, the depression angles of the drill holes are obliquely and downwards arranged along the coal seam, the distance between the hole openings and the top plate is 1.0m, when the drill holes are arranged on the upper drift upper side or the lower drift upper side, the elevation angles of the drill holes are obliquely and upwards arranged along the coal seam, the distance between the hole openings and the top plate is 1.5m, the depth of pressure relief holes is 10.
2. The method for managing rock burst according to claim 1, wherein in S3, MFB-100 type detonators are used for blasting, and the number of detonators per shot is 1. And the distance of the warning line is at least 200m during blasting, the blasting hiding time is not less than 30min, if the coal seam drilled hole is drilled for 12 m smoothly, the pressure relief effect meets the requirement, and if not, the blasting is continued to relieve the pressure.
3. The method of claim 1, wherein in step S3, before protection, the working face must be closed and managed, the number of workers on the working face is controlled, when the reduction of the cross section of the drift is greater than 70%, the drift should be reinforced and supported in time, the upper and lower drift supports should be reliable, the phenomena of broken net and lost anchor should be handled in time, the pillars should be tied with full fall-proof ropes, the pillars are fixedly connected with each other by a triangular stabilizing frame, the top beam is hung on the top beam by 8 # iron wires, the upper and lower drifts are advanced by 80m, the width of the sidewalk is not less than 0.95m, the height of the drift is not less than 2m, hoses are all used in the drift advanced by 100m, idle materials are not stored in the range of 200m, idle equipment and cable racks are stored outside the range of 150m in the drift, and the roots are fixed on the drift sides, when the danger of impact is monitored, a dispatching room and related leaders need to be reported immediately, field personnel are informed to evacuate a dangerous area, targeted pressure relief work is arranged, and for individual worker protective measures, knowledge promotion and safety consciousness education need to be strengthened.
4. The method for treating rock burst according to claim 1, wherein in S4, the explosive is mining emulsion explosive, the explosive loading is 4Kg per hole, 2-primer-second delay electric detonator is used for positive charge initiation, three water stemming per hole and the rest are sealed by yellow mud, single-hole parallel guns are connected in series, the guns are connected in series between the holes, and 3-5 pressure relief holes are detonated each time to improve the pressure relief effect.
5. The method for treating rock burst according to claim 1, wherein in step S2, the blasting is selected in such a way that the structure of the coal body is changed by blasting in the area outside the peak area of the supporting pressure of the coal body in front of the working face, the condition of forming the risk of impact is eliminated or slowed down, the advanced loosening blasting is carried out by adopting a deep hole blasting method, in order to ensure safety, an unloading protective zone with sufficient width is required in front of the mining face and around the roadway, and when the depth of blasting unloading is selected, the width of the protective zone plus the progress of the working face is equal to the width of the protective zone in front of the coal mining face.
6. The method for treating rock burst according to claim 1, wherein the technical management of rock burst is to identify the coal bed impact tendency of each mined coal bed, carefully make the risk evaluation of the rock burst of the to-be-mined section, compile a special design for preventing and treating the rock burst, evaluate the section with the risk of the rock burst, compile the special design for preventing and treating the rock burst according to the mining area design and the tunneling and coal mining operation rules, adopt a correct mining mode and a mining production process, necessarily adopt a longwall backward mining method and a full-span type roof management method, scientifically arrange the mining sequence, avoid the artificial formation of an island and a semi-isolated island concentrated region, optimize the arrangement of a roadway, require timely bandaging to find the underground situation after the rock burst occurs, generate injured personnel, actively organize the personnel to perform field first aid, and simply stop bleeding for the lightly injured personnel, after the critically ill wounded persons are treated by simple medical treatment, the wounded persons are organized in time and conveyed to the ground.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113756853A (en) * | 2021-07-31 | 2021-12-07 | 山东省煤田地质规划勘察研究院 | Deep well soft rock stratum rock burst protector |
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| CN113756853B (en) * | 2021-07-31 | 2024-05-10 | 山东省煤田地质规划勘察研究院 | Deep well soft rock stratum rock burst protection device |
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