CN112483150A - Method for preventing and controlling rock burst of separation layer roadway - Google Patents
Method for preventing and controlling rock burst of separation layer roadway Download PDFInfo
- Publication number
- CN112483150A CN112483150A CN202011504860.0A CN202011504860A CN112483150A CN 112483150 A CN112483150 A CN 112483150A CN 202011504860 A CN202011504860 A CN 202011504860A CN 112483150 A CN112483150 A CN 112483150A
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- Prior art keywords
- grouting
- rock burst
- support
- roof
- separation
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- Pending
Links
- 238000000926 separation method Methods 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000011156 evaluation Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims abstract description 3
- 238000005065 mining Methods 0.000 description 6
- 230000032798 delamination Effects 0.000 description 4
- 230000006578 abscission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for preventing and controlling rock burst of a separation roadway, which comprises the following steps: step one, determining a dangerous area: determining a dangerous area according to specific conditions of a coal seam roof, a support form, rock burst influence factors and a rock burst danger evaluation result and by combining specific mine pressure monitoring separation data; secondly, grouting and reinforcing the anchor cable: for a stope with a separated layer roof, carrying out roof anchor cable grouting construction in a dangerous area, fixing an anchor cable in a rock stratum without a separated layer, and adopting a high-concentration slurry grouting process; step three, high primary support of the bracket: after grouting, the separation layer is compact, a support with high initial support force is supported, a part of space in the separation layer is compacted, and the top plate is supported strongly.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method for preventing and controlling bed burst of a separation roadway.
Background
The accidents of roof and rock burst caused by deep coal seam mining are major disaster accidents, along with the increase of mining depth, the enhancement of the complexity of geological conditions and the insufficient resistance of roadway support, the roof separation phenomenon of the roadway often occurs in the mining process, so that the support is invalid, and the roof fall accident of a local area or a large area occurs, thereby not only influencing production, but also causing serious potential safety hazards. Along with the increase of mining depth, deep geology disguise is strengthened, and the support is not in place, if the coal seam still has impact danger, can lead to roof abscission broken type impact dynamic pressure calamity, because there is great hidden danger under the abscission condition, the impact induces roof large tracts of land to fall fast, belongs to compound calamity, and dangerous pre-sum destructiveness that its lead to is difficult to control, when the stope has unusual high stress zone and fault structure, the impact danger is very serious. Therefore, the prediction and control of the rock burst of the separation stope under the conditions of multi-structure, high stress and large burial depth are the problems to be solved urgently. At present, the prediction of the rock burst danger under the condition is basically consistent with that of a common working face, and mainly comprises micro-shock, a drilling cutting method, electromagnetic radiation, stress online, mine pressure observation and the like.
Until now, no specific prediction method for impact risk aiming at specific conditions of a severe delamination stope exists. The conventional monitoring technology of the conventional method is difficult to quantitatively warn the impact danger of the separation stope and monitor the stress distribution and the energy release range caused by the roadway roof of the separation stope. And a manual intervention method is needed, the influence caused by delamination is avoided, the monitoring is carried out by penetrating into a non-delamination area, and the danger precursor information of the rock burst is really monitored.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a method for judging impact danger by combining a man-made window intervention technology and a preset support observation body aiming at the situation that the impact danger is difficult to judge and observe under the condition of a separated roof.
(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 separation layer roadway comprises the following steps:
step one, determining a dangerous area: determining a dangerous area according to specific conditions of a coal seam roof, a support form, rock burst influence factors and a rock burst danger evaluation result and by combining specific mine pressure monitoring separation data;
secondly, grouting and reinforcing the anchor cable: for a stope with a separated layer roof, carrying out roof anchor cable grouting construction in a dangerous area, fixing an anchor cable in a rock stratum without a separated layer, and adopting a high-concentration slurry grouting process;
step three, high primary support of the bracket: after grouting, the separation layer is compact, a support with high initial support force is supported, a part of space in the separation layer is compacted, and the top plate is supported strongly.
The invention has the positive effects that:
1. determining an impact danger area through multi-factor impact danger analysis and actual mine pressure monitoring of a specific separation roof stope;
2. aiming at the loosening range of a tunnel with a separation layer top plate, a separation layer belt anchor cable grouting process is adopted to fill a separation layer space, so that the top plate does not have a dynamic load effect;
3. the high initial supporting force support is erected, the space of the separation zone is compacted, the direct roof is kept in contact with the old roof, the separation zone is prevented from happening again, and the purpose of preventing and controlling rock burst is achieved through strong support.
Drawings
Fig. 1 is a schematic view of an impact danger area, fig. 2a is a schematic view of a delamination danger area, fig. 2b is a schematic view of a grouting area design, and fig. 3 is a schematic view of a support.
Detailed Description
The embodiment of the invention provides a method for preventing and controlling rock burst of a separation roadway, which comprises the following steps:
firstly, according to geological mining conditions of a roof stope of a separation layer, evaluation reports of dangerousness of rock burst and other data, observing separation layer data by combining specific mine pressure, and determining an impact dangerous area, wherein A is a dangerous area and is shown in figure 1;
and secondly, performing anchor cable grouting construction on the separation layer area to compact the separation layer space, wherein 1 is a grouting area, and 2 is a grouting compact area, which is shown in figure 2.
Thirdly, after grouting, a support is erected, the space of the separation layer is compacted, continuous transmission of supporting force is kept, and secondary separation is avoided, and 3, the support is a support supporting area, and the purpose of preventing and controlling rock burst is achieved through strong supporting, and the figure 3 shows.
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 separation layer roadway is characterized by comprising the following steps: the method comprises the following steps: step one, determining a dangerous area: determining a dangerous area according to specific conditions of a coal seam roof, a support form, rock burst influence factors and a rock burst danger evaluation result and by combining specific mine pressure monitoring separation data;
secondly, grouting and reinforcing the anchor cable: for a stope with a separated layer roof, carrying out roof anchor cable grouting construction in a dangerous area, fixing an anchor cable in a rock stratum without a separated layer, and adopting a high-concentration slurry grouting process;
step three, high primary support of the bracket: after grouting, the separation layer is compact, a support with high initial support force is supported, a part of space in the separation layer is compacted, and the top plate is supported strongly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504860.0A CN112483150A (en) | 2020-12-18 | 2020-12-18 | Method for preventing and controlling rock burst of separation layer roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504860.0A CN112483150A (en) | 2020-12-18 | 2020-12-18 | Method for preventing and controlling rock burst of separation layer roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112483150A true CN112483150A (en) | 2021-03-12 |
Family
ID=74914712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011504860.0A Pending CN112483150A (en) | 2020-12-18 | 2020-12-18 | Method for preventing and controlling rock burst of separation layer roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112483150A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518436A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Method for controlling tectonic rock burst in coal mine tunneling |
| CN104612705A (en) * | 2014-12-11 | 2015-05-13 | 中国矿业大学 | Roadway support method for preventing rock burst |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN206487489U (en) * | 2016-12-16 | 2017-09-12 | 安徽理工大学 | Deep-well high stress and soft rock mine roadway composite anchored net Steel bar rack supporting construction |
| CN109209457A (en) * | 2018-10-26 | 2019-01-15 | 辽宁工程技术大学 | A kind of energy-absorbing erosion control anchor cable and its application method |
| CN111911201A (en) * | 2020-08-04 | 2020-11-10 | 山东科技大学 | Energy-absorbing and energy-releasing comprehensive anti-impact support method for rock burst roadway |
-
2020
- 2020-12-18 CN CN202011504860.0A patent/CN112483150A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518436A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Method for controlling tectonic rock burst in coal mine tunneling |
| CN104612705A (en) * | 2014-12-11 | 2015-05-13 | 中国矿业大学 | Roadway support method for preventing rock burst |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN206487489U (en) * | 2016-12-16 | 2017-09-12 | 安徽理工大学 | Deep-well high stress and soft rock mine roadway composite anchored net Steel bar rack supporting construction |
| CN109209457A (en) * | 2018-10-26 | 2019-01-15 | 辽宁工程技术大学 | A kind of energy-absorbing erosion control anchor cable and its application method |
| CN111911201A (en) * | 2020-08-04 | 2020-11-10 | 山东科技大学 | Energy-absorbing and energy-releasing comprehensive anti-impact support method for rock burst roadway |
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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 |
Application publication date: 20210312 |
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| RJ01 | Rejection of invention patent application after publication |