CN105627846A - Method for preventing and treating rock burst through deep-hole pressure release blasting - Google Patents
Method for preventing and treating rock burst through deep-hole pressure release blasting Download PDFInfo
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- CN105627846A CN105627846A CN201610137892.9A CN201610137892A CN105627846A CN 105627846 A CN105627846 A CN 105627846A CN 201610137892 A CN201610137892 A CN 201610137892A CN 105627846 A CN105627846 A CN 105627846A
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- 238000005422 blasting Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000011435 rock Substances 0.000 title claims abstract description 35
- 239000004927 clay Substances 0.000 claims abstract description 10
- 238000005474 detonation Methods 0.000 claims abstract description 9
- 239000002360 explosive Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 14
- 239000003245 coal Substances 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 239000011505 plaster Substances 0.000 claims description 6
- 239000003086 colorant Substances 0.000 claims description 4
- 238000004880 explosion Methods 0.000 claims description 4
- 238000004033 diameter control Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 238000005065 mining Methods 0.000 description 7
- 235000020004 porter Nutrition 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/18—Plugs for boreholes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
本发明公开了一种深孔卸压爆破防治冲击地压的方法，所述方法首先是确定两帮应力集中区，即冲击地压可能的冲击启动区；然后在巷道两帮分别对称钻进垂直于巷道轴向的单排炮孔，炮孔深度至少应达到支承压力峰值区，装药长度和中心起爆点要接近峰值应力位置，装药方式为不耦合间隔装药；所述装药采用PVC套管辅助装药，并在孔内均匀布置三段，每个药包上安装一个雷管，使用黏土封堵炮孔；然后先将同孔内雷管连接线串联，再将所有孔内的雷管连接线串联形成的网络并联到爆破母线上接入发爆器，最后通过发爆器执行爆破操作。该发明方法能够充分的利用爆破能量，通过对巷帮可能的冲击启动区进行爆破卸压，达到降低巷道冲击地压危险程度的目的。
The invention discloses a method for preventing and controlling rock burst by deep hole depressurization blasting. The method firstly determines the stress concentration area of two sides, that is, the possible rock burst start-up area; For a single row of blastholes in the axial direction of the roadway, the depth of the blastholes should at least reach the peak area of the support pressure, the length of the charge and the central detonation point should be close to the peak stress position, and the charge method is uncoupled interval charge; the charge is made of PVC sleeve The tube assists the charge, and arranges three sections evenly in the hole, installs a detonator on each charge package, and uses clay to seal the blast hole; then first connect the detonator connecting lines in the same hole in series, and then connect the detonator connecting lines in all the holes The network formed in series is connected in parallel to the blasting bus to connect to the detonator, and finally the blasting operation is performed through the detonator. The method of the invention can make full use of the blasting energy, and achieve the purpose of reducing the risk of rock burst in the roadway by blasting and depressurizing the possible impact starting area of the roadway side.
Description
Technical field
The present invention relates to a kind of method preventing and treating rock burst, it is specifically related to the method for a kind of deephole bench blasting control rock burst, belongs to coal mining technical field.
Background technology
Along with the increase of coal mining depth, the complexity of deep mechanical environment and the change of mechanical property of coal seam so that in progress of coal mining, various dynamic disaster phenomenon takes place frequently, and rock burst is exactly wherein comparatively typical a kind of.
Rock burst is one of natural disaster the most serious in deep coalmining, when coal mining is to certain depth, under the acting in conjunction of terrestrial stress, mining-induced stress and tectonic stress, the working face of mine down-hole can be subject to the threat of rock burst to some extent, add the burst trend in coal seam self, and be subject to the impact of production technique and geologic agent, danger meeting more and more displaying along with the increase of mining depth of rock burst, thus bring great harm to production safety.
The method of control rock burst mainly contains the pre-water filling in coal seam at present, if patent name is the method (Patent publication No is CN101915098A) of preventing and controlling rock burst through hydraulic cutting, it needs the geology according to concrete coal mine impact, mining condition and rock burst feature, utilizes the preventing and controlling rock burst through hydraulic cutting of different modes. Owing to the method needs Consideration more, therefore in actually operating, limitation is relatively big, and process is loaded down with trivial details, and prevention effect is poor.
In addition, also has patent name for " a kind of deephole bench blasting method " (notification number is CN102997766B), first it discloses is that Drilling goes out the identical deep hole big gun hole of four diameters, and in each big gun hole, three intervals are set along its medullary ray and detonate uniformly a little, each detonates and a little all places a cartridge bag; Described cartridge bag head is equipped with two pieces of detonators, and the payment to a porter of payment to a porter and corresponding three detonators being positioned at another side that three cartridge bags correspondence is positioned at three detonators of the same side in same big gun hole is contacted connection respectively mutually; Described method adopts the decked charge fashion that is not coupled to load cartridge bag in big gun hole, and adopts air or water bag as soft bed course; Then the network parallel connection access blasting machine detonator wire series connection in all big gun holes formed, performs blast operations finally by blasting machine.
Although this wellhole blasting method is better to rock burst prevention effect, but also there is following problem: one is irrational blast hole depth, causes tunnel distortion serious, destroy country rock globality, cause two to help to baffle, crush; Two is unreasonable loaded constitution, causes blasting energy utilization ratio low, not only efficient solution can not endanger except rock burst, even facilitates the generation of rock burst.
Summary of the invention
For above-mentioned prior art Problems existing, the present invention provides the method for a kind of deephole bench blasting control rock burst, blasting energy can be made full use of, by lane is helped possible impacting start district carry out unloading pressure by blasting, reach press hazard level object with reducing roadway bump.
In order to realize above-mentioned purpose, the method for the deephole bench blasting control rock burst that the present invention adopts, comprises the following steps,
First determining that two help area of stress concentration, then creep into the single big gun hole being perpendicular to tunnel axis roadway's sides is symmetrical respectively, the diameter control in described big gun hole is at 65��90mm, and blast hole depth at least reaches support pressure peak region;
Then in big gun hole, it is evenly arranged cartridge bag, the head of described cartridge bag is equipped with a detonator, described detonator is guided to outside hole with the wire of two different colours respectively, then three detonator wires are twisted joint into short circuit in time, in described big gun hole, charge length and central initiation point are close to peak stress position, charging means is not for being coupled deck charging, and uncouple coefficient is 1.2��1.3, and adopts air as bed course;
After cartridge bag and buffer layer place, adopt aluminium to mould pipe clay is sent into big gun hole to carry out shutoff, then first will connect with detonator wire in big gun hole, it is parallel on shot firing cable to access blasting machine by the network that the detonator wire series connection in all big gun holes is formed again, performs blast operations finally by blasting machine.
As improvement, described single big gun hole is made up of three big gun holes that diameter is identical, and big gun hole is parallel with base plate with top board, orifice distance base plate 1.0��1.5m.
As improvement, the distance between described big gun hole is the twice of blasting crack district radius.
As improvement, described powder charge all adopts reverse powder charge, and uses PVC sleeve pipe deformation charge.
As improvement, described reverse powder charge is evenly place three electrical detonators with segment number in each big gun hole, namely puts one on eyeground, and then evenly interval puts one successively, and the sockets for collecting energy of all detonators points to eye mouth direction.
As improvement, described same segment number electrical detonator is 2��5 sections of allowed for use in coal mines millisecond delay electric detonators with segment number.
As improvement, described PVC sleeve pipe deformation charge uses cutter that pvc pipe is cut open from centre, explosive is put in PVC sleeve pipe, casinghead snarls with adhesive plaster and blocks up, on powder charge head, first piece of medicine volume places a detonator, connect wire and wire is filled in sleeve pipe, with adhesive plaster, the pvc pipe cut open is twined.
As improvement, the wire of different detonator length in reserve difference 200��500mm outside hole in same big gun hole.
As improvement, adopting air to be bed course in the method, the step loading cartridge bag is as follows,
(1) first detonating between a little to big gun hole bottom big gun hole places air bag, and the pvc pipe that then parcel air bag is filled explosive delivers to a place of detonating inside big gun hole;
(2) detonating between a little in the middle part of first pvc pipe and big gun hole and place air bag, the pvc pipe that the 2nd parcel air bag fills explosive is placed at a place of then detonating in the middle part of big gun hole;
(3) detonating between a little outside the 2nd pvc pipe and big gun hole places air bag, and the pvc pipe that the 3rd parcel air bag fills explosive is placed at a place of then detonating outside big gun hole;
(4) adopt aluminium to mould pipe clay is sent into big gun hole designated depth to carry out shutoff.
As improvement, load in the step (4) of cartridge bag,
When adopting clay shutoff big gun hole, the sealed borehole length for big gun hole is calculated by formula (1),
In formula (1), L-sealed borehole length, unit m; db-blasthole diameter, unit m; Pb-act on the C-J detonation pressure on big gun mud, unit Pa; Unit frictional force between f-big gun mud and hole wall, unit N;
The described C-J detonation pressure acted on big gun mud, for axial and radial Uncoincided charge, is calculated by formula (2):
In formula (2), ��0-explosive density, units/kg/m3; D-explosion velocity of explosive, unit m/s; dc-charge diameter, unit m; lc-charge length, unit m; lb-big gun bore length, unit m; N-pressure increase coefficient, 8��11.
Compared with the prior art, the useful effect of the present invention is embodied in:
1) method of a kind of deephole bench blasting control rock burst of the present invention, by reasonably determining interval of detonating, reaches press hazard level object with reducing roadway bump.
2) method of a kind of deephole bench blasting control rock burst of the present invention, adopt the mode of even discontinuous powder charge, blasting energy can be utilized fully, stress waves in soils and detonation gas effect are more abundant, by axial Uncoincided charge, it is possible to effectively avoid the over grind around big gun hole, reduce disintegrating area scope, increase the scope of Fractured zone, reach the object strengthening underground work face stability.
Accompanying drawing explanation
Fig. 1 is the relieving shot loaded constitution schematic diagram of the present invention;
Fig. 2 is the release steel for shot schematic diagram of the present invention;
In figure: 1, air, 2, wire, 3, detonator, 4, explosive, 5, pvc pipe, 6, big gun mud.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below by accompanying drawing and embodiment, the present invention being further elaborated. It should be understood that specific embodiment described herein is only in order to explain the present invention, it is not limited to the scope of the present invention.
A method for deephole bench blasting control rock burst, the method comprises the following steps,
First being determine that two help area of stress concentration, then creep into the single big gun hole being perpendicular to tunnel axis roadway's sides is symmetrical respectively, described blasthole diameter controls at 65��90mm, and blast hole depth at least should reach support pressure peak region;
Then in big gun hole, it is evenly arranged three sections of cartridge bags, the head of described cartridge bag is equipped with a detonator 3, described detonator 3 is guided to outside hole with the wire 2 of two different colours respectively, then three detonator wires are twisted joint into short circuit in time, wherein, charge length and central initiation point will close to peak stress positions, charging means is not for being coupled deck charging, uncouple coefficient is 1.2��1.3, and adopt air 1 as bed course, i.e. cartridge bag in each big gun hole and be all filled with air bag in the gap between hole wall, thus the Blasting shock wave produced when making blast just can must be propagated in hole wall by air cushion, and air cushion not only can weaken the original pressure peak value that Blasting shock wave acts on big gun hole, the time of Blasting shock wave effect can also be extended simultaneously, therefore, it is possible to effectively improve blasting effect, increase the energy of burst stress volume ripple and reduce the generation of disintegrating area,
After cartridge bag and buffer layer place, adopt aluminium to mould pipe clay is sent into big gun hole to carry out shutoff, then first will connect with detonator wire in big gun hole, it is parallel on shot firing cable to access blasting machine by the network that the detonator wire series connection in all holes is formed again, performs blast operations finally by blasting machine.
As the improvement of embodiment, it is determined that two help the method for area of stress concentration to be first pass through detecting earth stress, it is possible to adopt de-stressing method, strain recovery method or stress recovery method, then obtain two and help area of stress concentration scope.
As the improvement of embodiment, as shown in Figure 2, described single big gun hole is made up of three big gun holes that diameter is identical, and big gun hole is parallel with base plate with top board, orifice distance base plate 1.0��1.5m, and the distance between described big gun hole is the twice of blasting crack district radius.
As the further improvement of embodiment, described blasting crack district radius is by on-the-spot single hole explosion measurements determination.
As the improvement of embodiment, described powder charge all adopts reverse powder charge, and uses PVC sleeve pipe deformation charge.
As the improvement of embodiment, described reverse powder charge is evenly place three electrical detonators with segment number in each big gun hole, namely puts one on eyeground, and then evenly interval puts one successively, and the sockets for collecting energy of all detonators 3 points to eye mouth direction.
As the improvement of embodiment, described same segment number electrical detonator is 2��5 sections of allowed for use in coal mines millisecond delay electric detonators with segment number.
As the improvement of embodiment, as shown in Figure 1, described PVC sleeve pipe deformation charge uses cutter that pvc pipe 5 is cut open from centre, explosive 4 is put in PVC sleeve pipe, casinghead snarls with adhesive plaster and blocks up, on powder charge head, first piece of medicine volume places a detonator 3, connects wire 2 and wire 2 is filled in sleeve pipe, twined by the pvc pipe 5 cut open with adhesive plaster.
As the improvement of embodiment, the wire 2 of different detonator 3 length in reserve difference 200��500mm outside hole in same big gun hole, namely payment to a porter wire length in reserve outside hole of same detonator 3 is identical, being distinguished by distinct colors, the wire 2 of different detonator 3 is distinguished by the length of wire 2 outside hole;
As the improvement of embodiment, adopting air 1 for bed course in the method, the step loading cartridge bag is as follows,
(1) first detonating between a little to big gun hole bottom big gun hole places air bag, and the pvc pipe 5 that then parcel air bag is filled explosive 4 delivers to a place of detonating inside big gun hole;
(2) detonating between a little in the middle part of first pvc pipe 5 and big gun hole and place air bag, the pvc pipe 5 that the 2nd parcel air bag fills explosive 4 is placed at a place of then detonating in the middle part of big gun hole;
(3) detonating between a little outside the 2nd pvc pipe 5 and big gun hole places air bag, and the pvc pipe 5 that the 3rd parcel air bag fills explosive 4 is placed at a place of then detonating outside big gun hole;
(4) adopt aluminium to mould pipe clay is sent into big gun hole designated depth to carry out shutoff.
Wherein, when adopting clay shutoff big gun hole, the sealed borehole length for big gun hole can pass through formula (1) estimation:
In formula (1), L-sealed borehole length, unit m; db-blasthole diameter, unit m; Pb-act on the C-J detonation pressure on big gun mud, unit Pa; Unit frictional force between f-big gun mud and hole wall, unit N.
In addition, the above-mentioned C-J detonation pressure acted on big gun mud 6, for axial and radial Uncoincided charge, it is possible to estimated by formula (2):
In formula (2), ��0-explosive density, units/kg/m3; D-explosion velocity of explosive, unit m/s; dc-charge diameter, unit m; lc-charge length, unit m; lb-big gun bore length, unit m; N-pressure increase coefficient, 8��11.
The method of a kind of deephole bench blasting control rock burst of the present invention, adopt the mode of even discontinuous powder charge, blasting energy can be utilized fully, stress waves in soils and detonation gas effect are more abundant, by axial Uncoincided charge, effectively avoid the over grind around big gun hole, reduce disintegrating area scope, increase the scope of Fractured zone, reach the object strengthening underground work face stability.
To those skilled in the art, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit or the essential characteristic of the present invention, it is possible to realize the present invention in other specific forms. Therefore, no matter from which point, embodiment all should be regarded as exemplary, and right and wrong are restrictive, the scope of the present invention is limited by claims instead of above-mentioned explanation, it is intended that all changes in the implication of the equivalent important document dropping on claim and scope included in the present invention. Any Reference numeral in claim should be considered as the claim involved by limiting.
Claims (10)
1. the method for a deephole bench blasting control rock burst, it is characterised in that: the method comprises the following steps,
First determining that two help area of stress concentration, then creep into the single big gun hole being perpendicular to tunnel axis roadway's sides is symmetrical respectively, the diameter control in described big gun hole is at 65��90mm, and blast hole depth at least reaches support pressure peak region;
Then in big gun hole, it is evenly arranged cartridge bag, the head of described cartridge bag is equipped with a detonator, described detonator is guided to outside hole with the wire of two different colours respectively, then three detonator wires are twisted joint into short circuit in time, in described big gun hole, charge length and central initiation point are close to peak stress position, charging means is not for being coupled deck charging, and uncouple coefficient is 1.2��1.3, and adopts air as bed course;
After cartridge bag and buffer layer place, adopt aluminium to mould pipe clay is sent into big gun hole to carry out shutoff, then first will connect with detonator wire in big gun hole, it is parallel on shot firing cable to access blasting machine by the network that the detonator wire series connection in all big gun holes is formed again, performs blast operations finally by blasting machine.
2. the method for a kind of deephole bench blasting according to claim 1 control rock burst, it is characterised in that: described single big gun hole is made up of three big gun holes that diameter is identical, and big gun hole is parallel with base plate with top board, orifice distance base plate 1.0��1.5m.
3. the method for a kind of deephole bench blasting according to claim 2 control rock burst, it is characterised in that: the distance between described big gun hole is the twice of blasting crack district radius.
4. the method for a kind of deephole bench blasting according to claim 1 control rock burst, it is characterised in that: described powder charge all adopts reverse powder charge, and uses PVC sleeve pipe deformation charge.
5. the method for a kind of deephole bench blasting according to claim 4 control rock burst, it is characterized in that: described reverse powder charge is evenly place three electrical detonators with segment number in each big gun hole, namely one is put on eyeground, then evenly interval puts one successively, and the sockets for collecting energy of all detonators points to eye mouth direction.
6. the method for a kind of deephole bench blasting according to claim 5 control rock burst, it is characterised in that: described same segment number electrical detonator is 2��5 sections of allowed for use in coal mines millisecond delay electric detonators with segment number.
7. the method for a kind of deephole bench blasting according to claim 4 control rock burst, it is characterized in that: described PVC sleeve pipe deformation charge uses cutter that pvc pipe is cut open from centre, explosive is put in PVC sleeve pipe, casinghead snarls with adhesive plaster and blocks up, on powder charge head, first piece of medicine volume places a detonator, connect wire and wire is filled in sleeve pipe, with adhesive plaster, the pvc pipe cut open is twined.
8. the method for a kind of deephole bench blasting control rock burst according to claim 1 or 5 or 6 or 7, it is characterised in that:, the wire of different detonator length in reserve outside hole differs 200��500mm in same the big gun hole in.
9. the method for a kind of deephole bench blasting according to claim 1 control rock burst, it is characterised in that: adopting air to be bed course in the method, the step loading cartridge bag is as follows,
(1) first detonating between a little to big gun hole bottom big gun hole places air bag, and the pvc pipe that then parcel air bag is filled explosive delivers to a place of detonating inside big gun hole;
(2) detonating between a little in the middle part of first pvc pipe and big gun hole and place air bag, the pvc pipe that the 2nd parcel air bag fills explosive is placed at a place of then detonating in the middle part of big gun hole;
(3) detonating between a little outside the 2nd pvc pipe and big gun hole places air bag, and the pvc pipe that the 3rd parcel air bag fills explosive is placed at a place of then detonating outside big gun hole;
(4) adopt aluminium to mould pipe clay is sent into big gun hole designated depth to carry out shutoff.
10. the method for a kind of deephole bench blasting according to claim 9 control rock burst, it is characterised in that: load in the step (4) of cartridge bag,
When adopting clay shutoff big gun hole, the sealed borehole length for big gun hole is calculated by formula (1),
In formula (1), L-sealed borehole length, unit m; db-blasthole diameter, unit m; Pb-act on the C-J detonation pressure on big gun mud, unit Pa; Unit frictional force between f-big gun mud and hole wall, unit N;
The described C-J detonation pressure acted on big gun mud, for axial and radial Uncoincided charge, is calculated by formula (2):
In formula (2), ��0-explosive density, units/kg/m3; D-explosion velocity of explosive, unit m/s; dc-charge diameter, unit m; lc-charge length, unit m; lb-big gun bore length, unit m; N-pressure increase coefficient, 8��11.
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| CN201610137892.9A CN105627846B (en) | 2016-03-10 | 2016-03-10 | A kind of method that deephole bench blasting prevents and treats bump |
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| CN201610137892.9A CN105627846B (en) | 2016-03-10 | 2016-03-10 | A kind of method that deephole bench blasting prevents and treats bump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007288A (en) * | 2017-12-29 | 2018-05-08 | 煤炭科学技术研究院有限公司 | Powder charge method for sealing for underground coal mine deep hole top plate presplit blasting |
| CN108548460A (en) * | 2018-05-21 | 2018-09-18 | 北京科技大学 | A kind of method of blast hole and large diameter borehole coupling release prevention bump |
| CN108661642A (en) * | 2018-04-23 | 2018-10-16 | 北京科技大学 | A kind of method of the nearly upright Bumping Pressure in Coal Layers of depth hole relieving shot prevention |
| CN111255465A (en) * | 2020-03-03 | 2020-06-09 | 中国矿业大学 | Method for forming roadway impact-resistant weak structural layer by coal rock blasting and fracturing |
| CN111271120A (en) * | 2020-01-22 | 2020-06-12 | 天地科技股份有限公司 | Coal mine rock burst dynamic and static load source-based danger relieving method |
| CN111882828A (en) * | 2020-07-22 | 2020-11-03 | 郝磊 | Landslide prevention early warning device and using method thereof |
| CN112129187A (en) * | 2020-10-20 | 2020-12-25 | 昆明理工大学 | A kind of air spaced charging structure and charging method |
| CN112709573A (en) * | 2019-10-24 | 2021-04-27 | 西安闪光能源科技有限公司 | Hard coal face rock burst prevention and control method based on controllable shock wave pre-splitting |
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| CN102997766A (en) * | 2012-11-24 | 2013-03-27 | 河南大有能源股份有限公司常村煤矿 | Deep-hole pressure-relief blasting method |
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| CN112709573B (en) * | 2019-10-24 | 2023-08-11 | 西安闪光能源科技有限公司 | Prevention method of rock burst in hard coal mining face based on controllable shock wave pre-cracking |
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| CN111255465A (en) * | 2020-03-03 | 2020-06-09 | 中国矿业大学 | Method for forming roadway impact-resistant weak structural layer by coal rock blasting and fracturing |
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