CN111622758A - Pressure relief method for relieving rock burst disaster - Google Patents
Pressure relief method for relieving rock burst disaster Download PDFInfo
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- CN111622758A CN111622758A CN202010414255.8A CN202010414255A CN111622758A CN 111622758 A CN111622758 A CN 111622758A CN 202010414255 A CN202010414255 A CN 202010414255A CN 111622758 A CN111622758 A CN 111622758A
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- 239000011435 rock Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005422 blasting Methods 0.000 claims abstract description 14
- 230000000116 mitigating effect Effects 0.000 claims abstract 6
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 28
- 230000003313 weakening effect Effects 0.000 abstract description 26
- 238000005065 mining Methods 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of coal mine safety mining, in particular to a pressure relief method for relieving rock burst disasters. A pressure relief method for mitigating a rock burst hazard comprising the steps of deploying sensors in a base roof and/or a direct roof to monitor the base roof and/or the direct roof; arranging an overlong hole in the basic roof; and performing hydraulic fracturing surrounding rock pre-cracking and/or blasting surrounding rock pre-cracking in the ultra-long hole. According to the pressure relief method for relieving the rock burst disaster, the sensors are arranged in the basic roof and/or the direct roof, so that the large data integration analysis of the basic roof and/or the direct roof can be realized, the stress concentration degree, the surrounding rock movement and the fracture tendency of the surrounding rock are obtained, and a basis is provided for the weakening time, position and range of the surrounding rock in the subsequent steps. The purpose of weakening the basic roof can be achieved by arranging the overlong hole in the basic roof and performing hydraulic fracturing surrounding rock pre-splitting and/or blasting surrounding rock pre-splitting in the overlong hole.
Description
Technical Field
The invention relates to the technical field of coal mine safety mining, in particular to a pressure relief method for relieving rock burst disasters.
Background
Coal mine rock burst is a dynamic disaster which has great harm to coal mine safety production and generally occurs along with the coal mine excavation process. The cause of rock burst is related to the overburden conditions above the coal seam, and generally speaking, the surrounding rock of the coal seam mainly comprises a bottom plate, the coal seam, a direct roof and a basic roof from the bottom to the top. The direct roof and the basic roof are various lithological compositions with large range and unequal thickness. After the coal seam is mined, the direct roof is broken to different degrees until the direct roof is collapsed and filled into a goaf. Due to various reasons, sometimes, the basic roof cannot be collapsed in time and is densely filled, so that the basic roof above the basic roof continuously sinks, and further stress concentration of surrounding coal rock mass is caused, and rock burst is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a pressure relief method for relieving rock burst disasters, which can weaken the basic roof in a large area, weaken the area of the basic roof and achieve the purpose of relieving pressure and danger before coal seam mining.
The pressure relief method for relieving the rock burst disaster comprises the following steps:
arranging sensors in a base roof and/or a direct roof to monitor the base roof and/or the direct roof;
arranging an overlong hole in the basic roof;
and performing hydraulic fracturing surrounding rock pre-cracking and/or blasting surrounding rock pre-cracking in the ultra-long hole.
According to the pressure relief method for relieving the rock burst disaster, provided by the embodiment of the invention, the sensors are arranged in the basic roof and/or the direct roof, so that the large data integration analysis of the basic roof and/or the direct roof can be realized, the stress concentration degree, the surrounding rock movement and the fracture tendency of the surrounding rock are obtained, and a basis is provided for the weakening time, position and range of the surrounding rock in the subsequent steps. The purpose of weakening the basic roof can be achieved by arranging the overlong hole in the basic roof and performing hydraulic fracturing surrounding rock pre-splitting and/or blasting surrounding rock pre-splitting in the overlong hole. The basic top of the underground mined or to-be-mined working face is weakened, and the basic top of a single stope working face or a plurality of stope working faces can be weakened. Therefore, the large-area weakening of the basic roof can be realized, the weakening of the area of the basic roof is realized, and the purpose of pressure relief and danger relief before coal seam mining is achieved. If the coal mine excavation is already carried out, the pressure relief weakening of the basic roof of the mined coal seam in the area to be mined can be realized, the dynamic pressure influence of the long-term large-area bending and sinking of the basic roof on the surrounding rock is reduced, the dynamic load energy generated by rock burst is reduced, and the major dynamic disaster endangering the mine safety, namely the mine rock burst, is fundamentally solved.
According to one embodiment of the invention, the step of arranging an oblong hole in the basic roof comprises:
laying the overlong holes in the basic roof in the existing roadway;
or, a temporary tunnel is dug in the basic roof, and the overlong hole is arranged in the temporary tunnel towards the basic roof.
According to one embodiment of the invention, the step of laying an oblong hole in the basic roof further comprises:
and arranging the overlong holes in the to-be-protected roadway towards the basic roof.
According to one embodiment of the invention, the temporary roadway runs parallel to the existing roadway;
or an included angle is formed between the trend of the temporary roadway and the trend of the existing roadway.
According to one embodiment of the invention, the direction of the oblong holes is parallel to the direction of the stope face and/or the gob;
or an included angle is formed between the trend of the overlong hole and the trend of the stope face and/or the goaf.
According to one embodiment of the invention, the number of the temporary roadways is multiple, and the trends of the multiple temporary roadways are parallel to each other;
or included angles are formed among the trends of the plurality of temporary roadways.
According to one embodiment of the invention, the number of the super long holes is multiple, and the directions of the super long holes are parallel to each other;
or included angles are formed among the trends of the multiple overlong holes.
According to an embodiment of the invention, the step of performing hydraulic fracturing and/or blasting wall rock pre-splitting in the ultra-long hole further comprises: and performing directional perforation or hydraulic slotting in the overlong hole.
According to one embodiment of the invention, the sensor comprises at least one of a surrounding rock stress sensor, a displacement sensor, an acceleration sensor, a microseismic sensor and a geophone.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
according to the pressure relief method for relieving the rock burst disaster, provided by the embodiment of the invention, the sensors are arranged in the basic roof and/or the direct roof, so that the large data integration analysis of the basic roof and/or the direct roof can be realized, the stress concentration degree, the surrounding rock movement and the fracture tendency of the surrounding rock are obtained, and a basis is provided for the weakening time, position and range of the surrounding rock in the subsequent steps. The purpose of weakening the roof can be achieved by arranging the overlong hole in the basic roof and performing hydraulic fracturing surrounding rock pre-splitting and/or blasting surrounding rock pre-splitting in the overlong hole. The basic top of the underground mined or to-be-mined working face is weakened, and the basic top of a single stope working face or a plurality of stope working faces can be weakened. Therefore, the large-area weakening of the basic roof can be realized, the weakening of the area of the basic roof is realized, and the purpose of pressure relief and danger relief before coal seam mining is achieved. If the coal mine excavation is already carried out, the pressure relief weakening of the basic roof of the mined coal seam in the area to be mined can be realized, the dynamic pressure influence of the long-term large-area bending and sinking of the basic roof on the surrounding rock is reduced, the dynamic load energy generated by rock burst is reduced, and the major dynamic disaster endangering the mine safety, namely the mine rock burst, is fundamentally solved.
In addition to the technical problems addressed by the present invention, the technical features of the constituent technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an ultra-long hole arranged in an existing roadway according to an embodiment of the present invention;
fig. 2 is a schematic top view of an ultra-long hole arranged in an existing roadway according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of another embodiment of the present invention, in which extra long holes are arranged in the existing roadway;
fig. 4 is a schematic top view of another embodiment of the present invention, in which extra long holes are arranged in the existing roadway;
fig. 5 is a schematic cross-sectional view illustrating an extra long hole disposed in a temporary tunnel according to an embodiment of the present invention;
fig. 6 is a schematic top view of an extra long hole arranged in a temporary tunnel according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of another embodiment of the invention, in which extra long holes are arranged in the temporary roadway;
fig. 8 is a schematic top view of another embodiment of the present invention, in which extra long holes are arranged in the temporary tunnels;
fig. 9 is a schematic cross-sectional view of an extra long hole arranged in a roadway to be protected according to an embodiment of the present invention;
fig. 10 is a schematic top view of an extra long hole arranged in a roadway to be protected according to an embodiment of the present invention.
Reference numerals:
100. a base top; 102. directly ejecting; 104. an overlong hole; 106. an existing roadway; 108. a temporary roadway; 110. simulating to protect the roadway; 112. stoping the working face; 114. a gob; 116. a base plate.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1 to 10, a pressure relief method for relieving a rock burst disaster according to an embodiment of the present invention includes the following steps:
s01, arranging sensors in the basic roof 100 and/or the direct roof 102 to monitor the basic roof 100 and/or the direct roof 102;
s02, arranging the overlong holes 104 in the basic roof 100;
and S03, performing hydraulic fracturing surrounding rock pre-cracking and/or blasting surrounding rock pre-cracking in the ultra-long hole 104.
According to the pressure relief method for relieving the rock burst disaster, provided by the embodiment of the invention, the sensors are arranged in the basic roof 100 and/or the direct roof 102, so that the large data integration analysis of the basic roof 100 and/or the direct roof 102 can be realized, the stress concentration degree, the surrounding rock movement and the fracture tendency of the surrounding rock can be obtained, and a basis is provided for the weakening time, position and range of the surrounding rock in the subsequent steps. The purpose of weakening the basic roof 100 can be achieved by arranging the overlong hole 104 in the basic roof 100 and performing hydraulic fracturing surrounding rock pre-splitting and/or blasting surrounding rock pre-splitting in the overlong hole 104. Weakening the base roof 100 of a downhole mined or to-be-mined face may weaken the base roof 100 of a single stope face 112 or multiple stopes faces 112. Therefore, the basic roof 100 can be weakened in a large area, the basic roof 100 can be weakened in the area, and the purpose of pressure relief and danger relief before coal seam mining is achieved. If the coal mining is already carried out, the pressure relief weakening of the basic roof 100 of the mined coal seam in the area to be mined can be realized, the dynamic pressure influence of the long-term large-area bending and sinking of the basic roof 100 on the surrounding rock is reduced, the dynamic load energy generated by rock burst is reduced, and the major dynamic disaster endangering the mine safety, namely the mine rock burst, is fundamentally solved.
Specifically, the pressure relief method for alleviating a rock burst disaster provided by the embodiment of the invention mainly comprises the following steps:
s01, arranging sensors in the basic roof 100 and/or the direct roof 102 to monitor the basic roof 100 and/or the direct roof 102;
in this step, several groups of sensors are arranged at different levels of the thick and hard key layer of the basic roof 100 and/or the direct roof 102, the sensors include but are not limited to surrounding rock stress, displacement, acceleration, microseismic, earthquake sound and the like, the state change of the surrounding rock is monitored in real time and continuously, the stress concentration degree, surrounding rock movement and fracture tendency of the surrounding rock are obtained through large data integration analysis of the measured and read data, and basis is provided for the time, position and range of weakening the surrounding rock in the subsequent step.
Where the immediate roof 102 refers to the roof immediately adjacent the stope face 112, the basic roof 100 refers to the roof above the immediate roof 102, and below the stope face is the floor 116.
In other words, the sensors may be deployed in three different processes before, during and after the coal seam is recovered. Alternatively, sensors are disposed in the stope face 112, the immediate roof 102 and/or the basic roof 100 above the goaf 114 in the existing roadway 106.
Of course, the arrangement of sensors in the basic roof 100 or the direct roof 102, or the arrangement of sensors in the basic roof 100 and the direct roof 102, can be flexibly selected according to actual situations. Preferably, sensors are disposed in both the base roof 100 and the direct roof 102.
S02, arranging the overlong holes 104 in the basic roof 100;
in this step, the base dome 100 fracture weakening may be performed by laying the oversized holes 104 in the base dome 100. Specifically, according to the predetermined basic roof 100, the range, the position and the opportunity of pressure relief can be determined in the basic roof 100, and the overlong holes 104 can be arranged in the basic roof 100 by combining the specific production and geological conditions of the coal mine. The deployment of the oversized holes 104 in the base roof 100 may weaken the base roof 100 of a downhole mined or recovered face 112, and may weaken the base roof 100 of a single recovered face 112 or multiple recovered faces 112.
In addition, in this step, the following three different cases can be further subdivided:
the first condition is as follows:
arranging an overlong hole 104 in the existing roadway 106 towards the basic roof 100;
in this case, according to the predetermined basic roof 100, the range, position and timing of pressure relief can be determined in the interior thereof, and the extra long hole 104 can be directly arranged in the existing roadway 106 to the basic roof 100 in combination with the concrete production and geological conditions of the coal mine.
In this case, as shown in fig. 1 to 4, the direction of the slot 104 may be parallel to the direction of the stope face 112 and/or the gob 114, or the direction of the slot 104 may form an angle with the direction of the stope face 112 and/or the gob 114. The black arrows shown in fig. 2 and 4 indicate the direction of the stope face 112.
In other words, the super-long hole 104 may run parallel to the stope face 112 and/or the gob 114 or may be inclined, and when the super-long hole 104 runs obliquely, the reference standard is the direction of the stope face 112 and/or the gob 114.
By deploying the slot 104 in the existing roadway 106 into the primary roof 100 above the stope 112 and/or gob 114, the primary roof 100 of the downhole mined or stope 112 and/or gob 114 may be weakened, and the primary roof 100 may be weakened for a single stope 112 or multiple stopes 112 and/or gobs 114.
Case two:
when it is inappropriate to arrange the overlong holes 104 into the basic roof 100 by arranging the overlong holes 104 in the existing tunnel 106, a temporary tunnel 108 may be excavated at an appropriate position in the basic roof 100, and the overlong holes 104 may be arranged into the basic roof 100 in the temporary tunnel 108.
In this case, the temporary roadway 108 may be excavated along a strike parallel to the stope face 112 and/or the gob 114 or obliquely to the strike of the stope face 112 and/or the gob 114. Alternatively, the temporary lane 108 may run parallel to the existing lane 106, or the temporary lane 108 may run at an angle to the existing lane 106. That is, the temporary lane 108 is obliquely arranged, and when the temporary lane 108 is obliquely arranged, the reference standard thereof is the trend of the existing lane 106.
Of course, the number of the temporary lanes 108 may be one or multiple, and when the number of the temporary lanes 108 is multiple, the multiple temporary lanes 108 may be parallel to each other, or an included angle is formed between the trends of the multiple temporary lanes 108, that is, the multiple temporary lanes 108 are not parallel to each other.
After the temporary tunnel 108 is successfully excavated, the overlong holes 104 are arranged in the temporary tunnel 108 towards the basic roof 100.
In this case, as shown in fig. 5 to 8, the direction of the slot 104 may be parallel to the direction of the stope face 112 and/or the gob 114, or the direction of the slot 104 may form an angle with the direction of the stope face 112 and/or the gob 114. The black arrows shown in fig. 6 and 8 indicate the direction of the stope face 112.
In other words, the super-long hole 104 may run parallel to the stope face 112 and/or the gob 114 or may be inclined, and when the super-long hole 104 runs obliquely, the reference standard is the direction of the stope face 112 and/or the gob 114.
By arranging the slot 104 in the temporary roadway 108 in the basic roof 100 above the stope 112 and/or the gob 114, the basic roof 100 above the stope 112 and/or the gob 114 can be weakened, and the basic roof 100 can be weakened for a single stope 112 or for multiple stopes 112 and/or gobs 114.
Case three:
the oblong holes 104 are arranged in the protection-planned roadway 110 into the basic roof 100. For the roadway 110 to be protected, the position of the basic roof 100 above the roadway 110 to be protected is determined according to the geological conditions of mine production, and one or more groups of parallel super-long holes 104 are arranged above the roadway 110 to be protected in the layer of the basic roof 100, so that the aim of weakening the basic roof 100 above the roadway 110 to be protected can be achieved.
At this time, as shown in fig. 9 and 10, the direction of the ultra-long hole 104 is parallel to the direction of the roadway 110 to be protected.
The basic roof 100 above the quasi-protection roadway 110 can be weakened by arranging the overlong holes 104 in the quasi-protection roadway 110 towards the basic roof 100 above the quasi-protection roadway 110, so that the influence of rock burst on the quasi-protection roadway 110 is weakened.
And S03, performing hydraulic fracturing surrounding rock pre-cracking and/or blasting surrounding rock pre-cracking in the ultra-long hole 104.
In this step, the purpose of weakening the basic roof 100 can be achieved by performing hydraulic fracturing and/or blasting wall rock pre-splitting in the ultra-long hole 104.
As mentioned above, the arrangement of the slot 104 in the basic roof 100 to perform fracture weakening can be subdivided into three different cases, so that the hydraulic fracture surrounding rock pre-splitting or blasting surrounding rock pre-splitting can be flexibly selected to achieve the purpose of weakening the basic roof 100 in view of the three different cases.
Further, under the three different conditions, a plurality of the super-long holes 104 may be arranged, the directions of the plurality of super-long holes 104 may be parallel to each other, or an included angle is formed between the directions of the plurality of super-long holes 104.
That is, for the first case, the direction of the multiple oblong holes 104 may be parallel to the direction of the stope face 112 and/or the gob 114 in the existing roadway 106, or there is an included angle between the directions of the multiple oblong holes 104; for the second case, the direction of the multiple overlong holes 104 may be parallel to the direction of the stope face 112 and/or the gob 114 in the temporary roadway 108, or an included angle is formed between the directions of the multiple overlong holes 104; for the case three, the direction of the plurality of elongated holes 104 may be parallel to the direction of the tunnel 110 to be protected, or the direction of the plurality of elongated holes 104 may be perpendicular to the direction of the tunnel 110 to be protected.
Still further, the step of performing hydraulic fracturing and/or blasting wall rock pre-splitting in the ultra-long hole 104 further comprises: directional perforation or hydraulic slitting is performed within the ultra-long holes 104. This may further enhance the fracture weakening effect.
In summary, the pressure relief method for relieving the rock burst disaster has the following technical effects:
the pressure relief method for relieving the rock burst disaster can be implemented at each stage of coal seam mining, can be generally planned synchronously with mining arrangement, and realizes large-area underground roof weakening, thereby realizing the area weakening of a basic roof 100 in a coal mine and achieving the purposes of pressure relief and danger relief before coal seam mining. If the coal mining is already carried out, the pressure relief weakening of the basic roof 100 of the mined coal seam in the area to be mined can be realized, the dynamic pressure influence of the long-term large-area bending and sinking of the basic roof 100 on the surrounding rock is reduced, the dynamic load energy generated by rock burst is reduced, and the major dynamic disaster endangering the mine safety, namely the mine rock burst, is fundamentally solved.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (9)
1. A pressure relief method for relieving rock burst disasters is characterized by comprising the following steps:
arranging sensors in a basic roof (100) and/or a direct roof (102) to monitor the basic roof (100) and/or the direct roof (102);
-laying an oblong hole (104) in the basic roof (100);
performing hydraulic fracturing and/or blasting surrounding rock pre-splitting in the ultra-long hole (104).
2. A method of pressure relief for mitigating rock burst disasters according to claim 1, wherein said step of deploying an oversized hole (104) in said base roof (100) comprises:
-laying said oblong holes (104) in the basic roof (100) inside the existing roadway (106);
alternatively, a temporary tunnel (108) is excavated in the basic roof (100), and the oblong holes (104) are arranged in the basic roof (100) within the temporary tunnel (108).
3. A method of pressure relief for mitigating a rock burst disaster as recited in claim 2 wherein said step of deploying an oversized hole (104) in said base roof (100) further comprises:
the oblong holes (104) are arranged in the basic roof (100) in the roadway (110) to be protected.
4. A method of pressure relief for mitigating a rock burst disaster according to claim 2, wherein the temporary roadway (108) runs parallel to the existing roadway (106);
or an included angle is formed between the trend of the temporary roadway (108) and the trend of the existing roadway (106).
5. A method of pressure relief for mitigating rock burst disasters according to claim 2, wherein the elongated hole (104) runs parallel to the stope face (112) and/or gob (114);
or an included angle is formed between the trend of the overlong hole (104) and the trend of the stope face (112) and/or the goaf (114).
6. A method of pressure relief for mitigating rock burst disasters according to any one of claims 2 to 5, wherein said temporary roadways (108) are plural, and the directions of said plural temporary roadways (108) are parallel to each other;
or the trend of a plurality of temporary roadways (108) has an included angle.
7. The pressure relief method for alleviating a rock burst disaster according to any one of claims 1 to 5, wherein the plurality of the elongated holes (104) are provided, and the plurality of the elongated holes (104) are parallel to each other;
or the trend of a plurality of the overlong holes (104) forms an included angle.
8. The pressure relief method for alleviating a rock burst disaster according to any one of claims 1 to 5, wherein the step of performing hydraulic fracturing and/or blasting wall rock pre-fracturing within the elongated hole (104) further comprises: performing directional perforation or hydraulic slotting in the overlong hole (104).
9. The pressure relief method for alleviating a rock burst disaster according to any one of claims 1 to 5, wherein the sensor comprises at least one of a surrounding rock stress sensor, a displacement sensor, an acceleration sensor, a microseismic sensor and a geophone.
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| CN103244180A (en) * | 2013-04-23 | 2013-08-14 | 山西潞安环保能源开发股份有限公司 | Gob-side entry driving surrounding rock control method using remaining small pillars |
| CN103216264A (en) * | 2013-04-24 | 2013-07-24 | 安徽理工大学 | Method for controlling deformation of surrounding rock of basic rimrock layer on presplitting blasting mining roadway |
| CN103411493A (en) * | 2013-08-13 | 2013-11-27 | 中国矿业大学 | Drilling and powder charging method for goaf-penetrating deep hole presplitting blasting |
| CN104234685A (en) * | 2014-07-22 | 2014-12-24 | 华北科技学院 | Staggered distribution method of anti-impact pressure relief drill holes in super high seam stoping surface |
| CN104533418A (en) * | 2014-11-19 | 2015-04-22 | 太原理工大学 | Deep hole static rock breaking method for underground coal mine |
| CN106705773A (en) * | 2016-09-14 | 2017-05-24 | 中国矿业大学 | Surface drilling pre-splitting blasting shallow burying method for room type goaf roof |
| CN107035370A (en) * | 2017-05-05 | 2017-08-11 | 太原理工大学 | One kind cuts top pressure relief method for gob side entry retaining static crushing |
| CN109297462A (en) * | 2018-11-09 | 2019-02-01 | 山东科技大学 | The observation device and method of base object model rock stratum dynamic settling amount are covered on goaf |
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