CN112483095A - Method for preventing and controlling rock burst of roadway in fault fracture area - Google Patents
Method for preventing and controlling rock burst of roadway in fault fracture area Download PDFInfo
- Publication number
- CN112483095A CN112483095A CN202011504868.7A CN202011504868A CN112483095A CN 112483095 A CN112483095 A CN 112483095A CN 202011504868 A CN202011504868 A CN 202011504868A CN 112483095 A CN112483095 A CN 112483095A
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- China
- Prior art keywords
- fault
- roadway
- area
- rock burst
- braided bag
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/48—Chocks or the like
- E21D15/483—Chocks or the like made of flexible containers, e.g. inflatable, with or without reinforcement, e.g. filled with water, backfilling material or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/01—Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level
Abstract
The invention discloses a method for preventing and treating rock burst of a roadway in a fault fracture area, which comprises the following steps of: step one, determining a dangerous area under the influence of a fault: according to the revealed fault occurrence and roadway display, a fault rock burst occurring section is researched and judged in advance to be used as a regional prevention and treatment key point; step two, erecting a flexible body and a closed bracket: expand earlier group, dig the end, expand group department and prop up and establish the braided bag, fill the coal body in the braided bag in-band, the braided bag is compressible, has the flexibility, then prop up and establish gantry support to the tunnel, and the support takes the floorbar, has the blocking effect: step three, local pressure relief: blasting and pressure relief are carried out on the area with large deformation and strong power display of the surrounding rock of the roadway, a broken body structure is formed, high stress of the fault area is buffered, and impact energy is dissipated and released.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method for preventing and controlling rock burst of a roadway in a fault fracture area.
Background
Theories and practices show that rock burst and geological structures are closely related dynamic disasters, and the dynamic disasters mainly occur in fault, flexure and other parts. Along with the increase of coal mining depth, the frequency and the strength of roadway rock burst in a fault fracture area are continuously increased, the rock burst generated in the fault area occupies a greater proportion of structural rock burst, and the fault fracture area impact disaster seriously restricts the safety production of coal mines in China. Practice proves that the roadway in the fault fracture area is relatively soft in rock stratum of the fault fracture area, the coal seam is high in impact risk, high stress exists around the roadway, the concealment of rock burst is high, the rock burst is caused by the rock burst, the roadway space is blocked, and the prevention difficulty is extremely high. The prevention and control of the rock burst are different from the conventional types, and the prevention and control are difficult by adopting conventional measures. Because the coal rock mass crushing area is large, the pertinence of the conventional support is poor, and if the conventional support is subjected to the strong disturbance action of a dynamic stress field of a working face, the rock burst with serious locality is easy to occur.
The rock burst of a fault fracture zone and a strong impact dangerous coal seam has strong concealment and is often suddenly impacted in a roadway dynamic influence area. For high stress concentration areas such as fault crossing and fault pinch-out zones, the continuous action of a dynamic and static stress field exists, the broken zone is continuously expanded, the stress distribution difference changes greatly, and the impact is difficult to prevent and control. Therefore, for the rock burst with hidden characteristics in the fault fracture area, a method for preventing and controlling the rock burst, which is suitable for a high-stress fracture zone and can be stably used for a long time, needs to be invented, and the method has important significance for preventing and controlling the disaster of the rock burst of the structure.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide an anti-impact method which is suitable for a high-stress fracture zone and can stably release energy for a long time, aiming at the reality that a fault type rock burst disaster occurs in a fault fracture zone and a coal seam with large mining depth and is difficult to prevent.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for preventing and controlling rock burst of a roadway in a fault fracture area comprises the following steps:
step one, determining a dangerous area under the influence of a fault: according to the revealed fault occurrence and roadway display, a fault rock burst occurring section is researched and judged in advance to be used as a regional prevention and treatment key point;
step two, erecting a flexible body and a closed bracket: expand earlier group, dig the end, expand group department and prop up and establish the braided bag, fill the coal body in the braided bag in-band, the braided bag is compressible, has the flexibility, then prop up and establish gantry support to the tunnel, and the support takes the floorbar, has the blocking effect:
step three, local pressure relief: blasting and pressure relief are carried out on the area with large deformation and strong power display of the surrounding rock of the roadway, a broken body structure is formed, high stress of the fault area is buffered, and impact energy is dissipated and released.
The invention has the positive effects that: for the mine with fault zone and deep rock burst, the whole support of the fault zone is realized through the support of the flexible and closed supports, the flexible body can dissipate and release energy, and the effective prevention of the rock burst in the fault zone is realized.
Drawings
Fig. 1 is a schematic view of a hazardous area, fig. 2 is a schematic view of a flexible body design, and fig. 3 is a schematic view of partial pressure relief.
Detailed Description
The embodiment of the invention provides a method for preventing and treating rock burst of a roadway in a fault fracture area, which comprises the following steps:
firstly, defining a dangerous area: determining an impact dangerous area according to fault and roadway crushing conditions and by taking a danger monitoring result as a basis and combining a stope mining environment, wherein A is a dangerous area, and is shown in figure 1;
secondly, supporting a flexible body and a bracket: expanding the tunnel, digging the bottom, erecting a wall body of a woven belt along the line of expanding the tunnel, erecting a bottom-sealing gantry support after the flexible body is erected, and absorbing and supporting a fault crushing area by the combined body, wherein 1 is a flexible body, 2 is a gantry support, and the figure is 2.
Thirdly, local pressure relief: for the area with strong mine pressure display and obvious dynamic effect in the roadway, a deep hole blasting technology is adopted, and the stress is slowly transferred to the deep part by using a plurality of holes and a small amount of explosive, as shown in figure 3.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A method for preventing and controlling rock burst of a roadway in a fault fracture area is characterized by comprising the following steps: the method comprises the following steps:
step one, determining a dangerous area under the influence of a fault: according to the revealed fault occurrence and roadway display, a fault rock burst occurring section is researched and judged in advance to be used as a regional prevention and treatment key point;
step two, erecting a flexible body and a closed bracket: expand earlier group, dig the end, expand group department and prop up and establish the braided bag, fill the coal body in the braided bag in-band, the braided bag is compressible, has the flexibility, then prop up and establish gantry support to the tunnel, and the support takes the floorbar, has the blocking effect:
step three, local pressure relief: blasting and pressure relief are carried out on the area with large deformation and strong power display of the surrounding rock of the roadway, a broken body structure is formed, high stress of the fault area is buffered, and impact energy is dissipated and released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504868.7A CN112483095A (en) | 2020-12-18 | 2020-12-18 | Method for preventing and controlling rock burst of roadway in fault fracture area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504868.7A CN112483095A (en) | 2020-12-18 | 2020-12-18 | Method for preventing and controlling rock burst of roadway in fault fracture area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112483095A true CN112483095A (en) | 2021-03-12 |
Family
ID=74914673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011504868.7A Pending CN112483095A (en) | 2020-12-18 | 2020-12-18 | Method for preventing and controlling rock burst of roadway in fault fracture area |
Country Status (1)
| Country | Link |
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| CN (1) | CN112483095A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109915142A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | A kind of major fault fringe region Controlling of Coal Outburst method |
| CN110219649A (en) * | 2019-06-13 | 2019-09-10 | 山东科技大学 | Buffering release drainage and wide lane flexible wall prevention and treatment tight roof stay lane bump method |
| CN110259448A (en) * | 2019-06-13 | 2019-09-20 | 山东科技大学 | Unload crush the lane Ding Yukuan flexible wall prevention and treatment tight roof stay lane bump method |
| CN111411962A (en) * | 2020-03-13 | 2020-07-14 | 陈卫军 | Coal mine rock burst treatment method |
-
2020
- 2020-12-18 CN CN202011504868.7A patent/CN112483095A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109915142A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | A kind of major fault fringe region Controlling of Coal Outburst method |
| CN110219649A (en) * | 2019-06-13 | 2019-09-10 | 山东科技大学 | Buffering release drainage and wide lane flexible wall prevention and treatment tight roof stay lane bump method |
| CN110259448A (en) * | 2019-06-13 | 2019-09-20 | 山东科技大学 | Unload crush the lane Ding Yukuan flexible wall prevention and treatment tight roof stay lane bump method |
| CN111411962A (en) * | 2020-03-13 | 2020-07-14 | 陈卫军 | Coal mine rock burst treatment method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210312 |