CN116335701A - Pressure relief method for rock burst roadway - Google Patents
Pressure relief method for rock burst roadway Download PDFInfo
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- CN116335701A CN116335701A CN202310620450.XA CN202310620450A CN116335701A CN 116335701 A CN116335701 A CN 116335701A CN 202310620450 A CN202310620450 A CN 202310620450A CN 116335701 A CN116335701 A CN 116335701A
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- pressure relief
- roadway
- rock burst
- blasting
- loose
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- 239000011435 rock Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005422 blasting Methods 0.000 claims abstract description 48
- 238000005553 drilling Methods 0.000 claims abstract description 37
- 238000005474 detonation Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims description 16
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003245 coal Substances 0.000 abstract description 5
- 238000005065 mining Methods 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a pressure relief method for rock burst roadways, relates to the technical field of coal mining, and is designed for solving the problem of insufficient pressure relief effect. The pressure relief method of the rock burst roadway comprises a pressure relief drilling step and a detonation blasting step; in the step of arranging the pressure relief drilling holes, a plurality of pressure relief drilling holes are arranged at different angles in the circumferential direction of the roadway; in the detonation blasting step, radial lancing is firstly carried out at least two lancing positions with different depths in each pressure relief drilling hole, and then loose blasting is carried out between the two positions of the radial lancing. The pressure relief method for the rock burst roadway can improve the pressure relief effect.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a pressure relief method for rock burst roadway.
Background
The rock burst disaster is a coal rock mass dynamic disaster common to coal mines, is generated by suddenly releasing a large amount of energy accumulated in the coal rock mass, has strong burst property and destructiveness, and can bring great threat to personnel and equipment once the rock burst disaster occurs.
For a roadway 10 with a tendency to develop rock burst disasters, necessary anti-impact measures are required to relieve surrounding rock pressure, and a common manner is shown in fig. 1. And pressure relief drilling holes are constructed on the two sides of the rock burst roadway 10 so as to reduce the stress concentration degree of surrounding rocks of the roadway 10 and further reduce the occurrence risk of rock burst. As shown in fig. 2, in some cases, when the surrounding rock pressure of the roadway 10 is too high, a blasting section (composed of an explosive section 41 and a mud sealing section 42) may be provided at the end of the pressure relief borehole 10, and the pressure relief area 50 may be further enlarged by blasting, so as to achieve a better surrounding rock pressure relief effect.
The method can realize the pressure relief and the danger relief of the rock burst roadway to a certain extent, but has some defects at the same time: (1) The pressure relief of surrounding rock points is realized through pressure relief drilling, the pressure relief range and degree are limited, and when the surrounding rock is large in mine pressure, the pressure relief effect is obviously insufficient. (2) The surrounding rock is unevenly depressurized, and stronger stress concentration is easy to generate in the areas without pressure relief. (3) The pressure relief protection effect is single, and when the pressure relief area 50 fails, the pressure relief protection effect is lost.
Disclosure of Invention
The first aim of the invention is to provide a pressure relief method for rock burst roadway, which aims to solve the technical problem of insufficient pressure relief effect in the prior art.
The pressure relief method for the rock burst roadway comprises a pressure relief drilling step and a detonation blasting step; in the step of arranging the pressure relief drilling holes, a plurality of pressure relief drilling holes are arranged at different angles in the circumferential direction of the roadway; in the detonation blasting step, radial lancing is firstly carried out at least two lancing positions with different depths in each pressure relief drilling hole, and then loose blasting is carried out between the two positions of the radial lancing.
The pressure relief method of the rock burst roadway has the beneficial effects that:
in the preferred technical scheme, the depth of the loose blasting position is larger than the supporting range of the anchor rod and the anchor cable of the roadway.
In the preferred technical scheme, the depth of the cutting position is larger than the supporting range of the anchor rod and the anchor cable.
In a preferred technical scheme, the radial cutting mode comprises a cumulative blasting cutting mode or a hydraulic cutting mode.
In a preferred embodiment, the hydraulic cutting includes cutting the weak face on the wall of the pressure relief borehole, and then injecting water into the weak face to increase the depth of the fracture.
In a preferred embodiment, the energy-gathering blasting slits are radial energy-gathering blasting along the pressure relief borehole.
In the preferred technical scheme, the positions of loose blasting in the pressure relief drilling holes are respectively consistent with the center of the roadway, and a pressure relief ring is formed around the roadway after the detonation blasting step.
In a preferred embodiment, in each of said pressure relief bores, a loose blasting is performed at least at two depths.
In the preferred technical scheme, in each pressure relief drilling hole, in the section perpendicular to the length direction of the roadway, the included angles of any two adjacent pressure relief drilling holes are consistent.
In a preferred embodiment, at least six pressure relief bores are arranged in a section perpendicular to the longitudinal direction of the roadway.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or background art of the present invention, the drawings that are needed in the description of the embodiments or background art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pressure relief method with only a pressure relief borehole as mentioned in the background of the invention;
FIG. 2 is a schematic diagram of a pressure relief method of setting a pressure relief borehole and performing blasting as mentioned in the background of the invention;
FIG. 3 is a schematic diagram of a method for pressure relief of a rock burst roadway according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a method for relieving pressure in a rock burst roadway according to an embodiment of the present invention approximately considered as forming a circular relief ring;
fig. 5 is a schematic diagram of a section of a non-pressure-relief drilling area in a pressure relief method for a rock burst roadway according to an embodiment of the present invention.
Reference numerals illustrate:
10-pressure relief drilling; 20-roadway; 31-anchor cable; 32-anchor rods; 41-explosive section; 42-sealing mud section; 50-a pressure relief zone; 60-pressure release ring.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment one:
FIG. 3 is a schematic diagram of a method for pressure relief of a rock burst roadway according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a method for relieving pressure in a rock burst roadway according to an embodiment of the present invention approximately considered as forming a circular relief ring; fig. 5 is a schematic diagram of a section of a non-pressure-relief drilling area in a pressure relief method for a rock burst roadway according to an embodiment of the present invention. As shown in fig. 3 to 5, the pressure relief method for rock burst roadway provided by the embodiment of the invention comprises the steps of arranging pressure relief drilling holes 10 and initiating explosion; in the step of disposing the pressure relief borehole 10, a plurality of pressure relief boreholes 10 are disposed at different angles in the circumferential direction of the roadway 20; in the detonation blasting step, radial slits are first made at least two slit locations of different depths in each pressure relief borehole 10, and then a loose blast is performed between the two locations of the radial slits.
Specifically, the plurality of pressure relief drillings 10 in the present embodiment refers to at least three pressure relief drillings 10, and the different angles in the circumferential direction of the roadway 20 refer to a plurality of holes of different angles that may be arranged in the same section of the roadway 20 perpendicular to the length direction, or a plurality of holes of different angles that may be arranged at a small distance from a certain section. Wherein the small distance is that the distance between the position of one or several pressure relief bores 10 and the position of the section of the other pressure relief bores 10 is smaller than half the step distance of the adjacent top plate. The step distance of the top plate is 10-20 m, namely, the distance is not large, which means that the distance between adjacent pressure relief drilling holes 10 in the length direction of the roadway 20 is smaller than 10 m.
Specifically, in the implementation manner described later in this embodiment, six pressure relief bores 10 are uniformly arranged in one cross section, and the adjacent pressure relief bores 10 form an angle of 60 °. In a further embodiment, it is also possible that adjacent pressure relief bores 10 are angled by 60 °, but only five pressure relief bores 10 are located in the same section, from which another pressure relief bore 10 is offset by two to three or four meters, and it is also possible to arrange a plurality of pressure relief bores 10 at different angles in the circumferential direction of the roadway 20 as described above. Alternatively, in another implementation manner, three groups of pressure relief drilling holes 10 may be uniformly arranged in each section at an included angle of 120 °, but the sections of every two groups of pressure relief drilling holes 10 are 5-10 m apart, and the similar effect as the scheme of spacing between every two groups of six pressure relief drilling holes 10 is 10-20 m can be achieved.
By first performing a radial kerf during the initiation blasting step, a weak point of the rock mass in the radial direction of the pressure relief borehole 10 is created, through which weak point the fracture of the rock mass does not pass when a loose blast between the two positions of the radial kerf occurs during the initiation blasting, such that the fracture of the rock mass is confined between the radial weaknesses on both sides of each loose blast, and does not extend completely uncontrolled, resulting in failure of communication of the fracture between the plurality of pressure relief boreholes 10. Therefore, the method can control the extending direction of the cracks of the rock mass during loose blasting, so that the cracks can extend along the radial direction of the pressure relief drilling holes 10, and the cracks generated by the adjacent pressure relief drilling holes 10 can be finally connected with each other to form a complete pressure relief ring 60, thereby increasing the pressure relief protection range, having no stress dead angle and providing full section protection for the roadway 20.
As shown in fig. 3-5, the loose blasting site preferably has a depth greater than the extent of support of the anchor rods 32 and anchor lines 31 of the roadway 20.
In particular, the extent of the support of the anchor rods 32 and the anchor lines 31 is generally within 15 meters, so the depth of the location of the loose blasting can be chosen to be at least 20 meters. That is, if only one location is provided in each pressure relief borehole 10 for a loose blast, the loose blast has a depth of at least 20 meters; if multiple loose shots are provided in each pressure relief borehole 10, the depth of the loose shot of the innermost layer is 20 meters.
By setting the position of the loose blasting in this way, the damage of the loose blasting to the original support of the anchor rod 32 and the anchor cable 31 can be avoided, and the safety and stability of the roadway 20 are reduced. The influence of rock burst on the roadway 20 is reduced under the condition of ensuring the original safety and stability of the roadway 20.
As shown in fig. 3-5, the depth of the lancing site is preferably greater than the extent of the support of the bolt 32 and cable 31.
Since the support range of the anchor rod 32 and the anchor cable 31 is usually within 15 meters, the depth of the slit position is more than 15 meters. Specifically, for a plurality of kerf locations in each pressure relief borehole 10, the depth of the innermost kerf location is 15 meters or more.
The depth of the joint cutting position is larger than the supporting range of the anchor rod 32 and the anchor cable 31, so that the rock mass where the anchor rod 32 and the anchor cable 31 are supported can be prevented from being damaged by radial joint cutting, and the stability of the support is ensured.
As shown in fig. 3-5, the radial slits preferably include a focused burst slit or a hydraulic cut.
By adopting a mode of energy gathering blasting lancing or hydraulic cutting, the crack trend during loose blasting can be effectively controlled, the energy consumption during radial lancing can be reduced, and the production cost is reduced.
As shown in fig. 3-5, preferably, the hydraulic cutting includes cutting the weak face on the wall of the pressure relief borehole 10, and then flooding the weak face with water to increase the fracture depth.
The weak surface is firstly cut on the hole wall of the pressure relief drilling hole 10, namely, an annular groove is firstly cut on the hole wall, and then the groove is broken into the rock mass in a water injection and pressure increasing mode to form cracks so as to control the crack trend during loose blasting.
The hydraulic cutting can utilize the existing grooving means and form cracks by matching with water injection expansion, so that the vibration to rock stratum is reduced, and the safety of the roadway 20 is improved.
As shown in fig. 3-5, the focused blasting slits are preferably focused blasting along the radial direction of the pressure relief borehole 10.
By performing the focused blasting along the radial direction of the pressure relief borehole 10, the energy of the focused blasting can be fully utilized to form deeper radial cracks, so as to be beneficial to limiting the extension boundary of loose blasting and controlling the trend of the loose blasting.
As shown in fig. 3-5, each loose burst in each pressure relief borehole 10 is preferably located consistently from the center of the roadway 20, respectively, and forms a relief ring 60 around the roadway 20 after the initiation of the burst step.
In each of the pressure relief bores 10, loose shots are performed at a consistent distance from the center of the roadway 20, and the cracks formed by each loose shot more easily intersect to form the pressure relief ring 60. Otherwise, if the positions of the loose blasting differ greatly, the cracks extend along the radial direction of each pressure relief drilling hole 10, so that the cracks are difficult to intersect, a complete pressure relief ring 60 cannot be formed, and rock burst is still transmitted to the roadway 20 from the rock mass through the positions where the cracks are not communicated, so that the roadway 20 has a safety accident.
As shown in fig. 3-5, in each pressure relief borehole 10, a loose blast is preferably performed at least two depths.
Specifically, in this example, loose blasting was performed at two positions of 20 m in hole depth and 27.5 m in hole depth.
The loose blasting is performed at least two depth positions, so that the pressure relief rings 60 generated by the loose blasting are located at two sides of a certain annular rock body, and a multi-layer pressure relief structure of strong-weak-strong is formed from the edge to the deep part of the roadway 20, wherein 'weak' refers to the pressure relief rings 60 generated by the loose blasting, and full-section multi-stage pressure relief protection can be provided for the rock burst roadway 20. When the outermost pressure relief ring 60 fails due to strong mine pressure, the inner pressure relief ring 60 recognizes the pressure relief protection.
As shown in fig. 3-5, it is preferable that in each of the pressure relief bores 10, the included angle between any adjacent two pressure relief bores 10 is uniform in a section perpendicular to the length direction of the roadway 20.
That is, when a plurality of pressure relief bores 10 are provided in the same cross section, the plurality of pressure relief bores 10 are evenly distributed. Specifically, in this embodiment, six pressure relief drillings 10 may be uniformly disposed in the same cross section, and the included angle between two adjacent pressure relief drillings 10 is 60 °.
The included angles of two adjacent pressure relief drilling holes 10 are set to be consistent, namely the pressure relief drilling holes 10 are uniformly distributed, so that when the pressure relief drilling holes 10 are subjected to loose blasting, cracks generated by blasting of each pressure relief drilling hole 10 can theoretically extend for the same length to meet, the explosive consumption of blasting is saved, and the explosive waste is avoided.
As shown in fig. 3-5, preferably, at least six pressure relief bores 10 are arranged in a cross section perpendicular to the length direction of the roadway 20.
In this embodiment, six pressure relief holes 10 are provided in the same cross section, and in practice, if the surrounding rock pressure is greater, the number of pressure relief holes 10 may be increased, for example, 8 or 10.
At least six pressure relief bores 10 are arranged, and in theory, at least hexagonal pressure relief rings 60 can be formed, which are close to the circular pressure relief rings 60, and the pressure relief effect is more uniform.
The pressure relief method for the rock burst roadway 20 provided in this embodiment includes the following steps:
1. taking 6 pressure relief drilling holes 10 uniformly distributed in one section around the roadway 20 as an example, the maximum spacing of each section is not greater than the top plate step-by-step distance, namely not greater than 10-20 meters. The depth of the pressure relief borehole 10 is greater than the extent of the support of the bolt 32 and cable 31, and in particular, typically the extent of the support of the bolt 32 and cable 31 is within 15 meters, the borehole depth being at least 30 meters in view of the extent of failure of the blast, the number of explosive segments 41 and the spacing between the explosive segments 41. Considering that the punching construction and the charging are convenient, the aperture of the pressure relief drilling hole 10 is 80-100 mm.
2. Radial lancing is performed at four lancing locations within the pressure relief borehole 10, with one lancing location being provided at each end of each loosely blasted region, so that the total of four lancing locations is four. In particular, the method can be used for blasting joint cutting or hydraulic joint cutting by using energy gathering.
3. Two explosive segments 41 are arranged between the lancing locations around and a putty segment 42 is arranged between the explosive segments 41. Considering the blasting damage range, the depth of the innermost explosive section 41 is at least 20 meters, the distance between every two explosive sections 41 is at least 5 meters, and the length of each explosive section 41 is predicted to be 2.5 meters. Thus, the two explosive sections 41 are 20 meters and 27.5 meters deep in sequence. The loading of each stage is usually 5kg or more, which is designed according to lithology.
4. The explosive charge segment 41 forms a relief ring 60 around the rock burst roadway 20.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
In the above embodiments, descriptions of orientations such as "up", "down", and the like are shown based on the drawings.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The pressure relief method for the rock burst roadway is characterized by comprising the steps of arranging pressure relief drilling holes (10) and initiating blasting; -in said step of arranging pressure relief bores (10), arranging a plurality of said pressure relief bores (10) at different angles in the circumferential direction of the roadway (20); in the detonation blasting step, radial lancing is firstly carried out at least two lancing positions with different depths in each pressure relief drilling hole (10), and then loose blasting is carried out between the two positions of the radial lancing.
2. The method of pressure relief of a rock burst roadway of claim 1, wherein the depth of the loose burst location is greater than the extent of support of the anchor rods (32) and anchor lines (31) of the roadway (20).
3. The method of pressure relief of rock burst roadway of claim 2 wherein the depth of the lancing site is greater than the extent of support of the bolt (32) and the anchor line (31).
4. A method of relieving pressure in a rock burst roadway as claimed in claim 3, wherein the means for radially slitting comprises a focused burst slit or a hydraulic cut.
5. The rock burst roadway pressure relief method of claim 4 wherein the hydraulic cutting comprises cutting the weak face on the wall of the pressure relief borehole (10) prior to flooding the weak face to increase the fracture depth.
6. The rock burst roadway pressure relief method of claim 4 wherein the focused blasting slits are radial focused blasts along the pressure relief borehole (10).
7. A rock burst roadway pressure relief method as claimed in any one of claims 1-6, wherein each of said loose blasts in each of said pressure relief drill holes (10) is located in respective agreement from the centre of said roadway (20), and wherein said detonating blasting step is followed by forming a pressure relief ring (60) around said roadway (20).
8. The rock burst roadway pressure relief method of claim 7 wherein in each of said pressure relief bores (10) a loose burst is performed at a location of at least two depths.
9. The rock burst roadway pressure relief method of claim 7 wherein in each of said pressure relief bores (10), the included angle between any adjacent two of said pressure relief bores (10) is uniform in a cross section perpendicular to the length of said roadway (20).
10. A rock burst roadway pressure relief method as claimed in claim 9, characterized in that at least six of said pressure relief bores (10) are arranged in a section perpendicular to the length direction of the roadway (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310620450.XA CN116335701B (en) | 2023-05-30 | 2023-05-30 | Pressure relief method for rock burst roadway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310620450.XA CN116335701B (en) | 2023-05-30 | 2023-05-30 | Pressure relief method for rock burst roadway |
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| CN116335701A true CN116335701A (en) | 2023-06-27 |
| CN116335701B CN116335701B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310620450.XA Active CN116335701B (en) | 2023-05-30 | 2023-05-30 | Pressure relief method for rock burst roadway |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4231617A (en) * | 1978-12-14 | 1980-11-04 | Gulf Oil Corporation | Consolidation of in-situ retort |
| SU1411473A1 (en) * | 1986-11-19 | 1988-07-23 | Ленинградский горный институт им.Г.В.Плеханова | Method of caving overburden |
| RU2381369C1 (en) * | 2008-08-28 | 2010-02-10 | Открытое акционерное общество "Научно-исследовательский институт горной геомеханики и маркшейдерского дела - Межотраслевой научный центр ВНИМИ" | Method for prevention of rock bursts in rocks of mine soil |
| CN102220866A (en) * | 2011-04-17 | 2011-10-19 | 山东科技大学 | Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift |
| CN103821516A (en) * | 2014-03-10 | 2014-05-28 | 平顶山天安煤业股份有限公司 | Method for preventing rock burst through secondary pressure relief |
| CN115539075A (en) * | 2022-11-01 | 2022-12-30 | 山东成通智能装备有限公司 | Method for arranging end mining pre-splitting pressure reduction withdrawal roadway of hard top plate working face of medium-thickness coal seam |
-
2023
- 2023-05-30 CN CN202310620450.XA patent/CN116335701B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4231617A (en) * | 1978-12-14 | 1980-11-04 | Gulf Oil Corporation | Consolidation of in-situ retort |
| SU1411473A1 (en) * | 1986-11-19 | 1988-07-23 | Ленинградский горный институт им.Г.В.Плеханова | Method of caving overburden |
| RU2381369C1 (en) * | 2008-08-28 | 2010-02-10 | Открытое акционерное общество "Научно-исследовательский институт горной геомеханики и маркшейдерского дела - Межотраслевой научный центр ВНИМИ" | Method for prevention of rock bursts in rocks of mine soil |
| CN102220866A (en) * | 2011-04-17 | 2011-10-19 | 山东科技大学 | Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift |
| CN103821516A (en) * | 2014-03-10 | 2014-05-28 | 平顶山天安煤业股份有限公司 | Method for preventing rock burst through secondary pressure relief |
| CN115539075A (en) * | 2022-11-01 | 2022-12-30 | 山东成通智能装备有限公司 | Method for arranging end mining pre-splitting pressure reduction withdrawal roadway of hard top plate working face of medium-thickness coal seam |
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|---|---|
| CN116335701B (en) | 2023-09-22 |
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