CN112483179A - Method for judging impact risk of roof stope of separation layer by window intervention method - Google Patents
Method for judging impact risk of roof stope of separation layer by window intervention method Download PDFInfo
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- CN112483179A CN112483179A CN202011504935.5A CN202011504935A CN112483179A CN 112483179 A CN112483179 A CN 112483179A CN 202011504935 A CN202011504935 A CN 202011504935A CN 112483179 A CN112483179 A CN 112483179A
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- window
- displacement
- roof
- stope
- pressure
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000926 separation method Methods 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 239000003245 coal Substances 0.000 claims abstract description 5
- 238000011156 evaluation Methods 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims abstract description 3
- 230000035772 mutation Effects 0.000 claims abstract description 3
- 238000005065 mining Methods 0.000 description 6
- 230000006578 abscission Effects 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 238000004458 analytical method Methods 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
- 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
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
Abstract
The invention discloses a method for judging impact risk of a separation roof stope by a window intervention method, 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 data; step two, a manual window intervention technology: for a stope of a separation roof, performing chamber construction of a roadway side in a dangerous area, then presetting a support body in the chamber, protecting and mounting a pressure sensor and a displacement sensor on the support body, and arranging a sensor observation window on one side of the roadway; step three, judging impact risk by supporting and protecting body resistance and displacement mutation in the window: and continuously observing the pressure and displacement conditions of the supporting body, and taking the pressure and displacement conditions of the supporting body of the multiple chambers as impact risk early warning when sudden change occurs.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method for judging impact risk of a separation roof stope by using a window intervention method.
Background
The top plate (rock burst) accident caused by mining is one of major disaster accidents of mines, the supporting resistance is often insufficient along with the increase of mining depth and the increase of complexity of geological conditions, the phenomenon of roadway top plate separation often occurs in the mining process, the supporting is ineffective, and the roof fall accident of a local area or a large area occurs, so that the production is influenced, and the serious potential safety hazard is caused. 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 judging impact risk of a separation roof stope by a window intervention 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 data;
step two, a manual window intervention technology: for a stope of a separation roof, performing chamber construction of a roadway side in a dangerous area, then presetting a support body in the chamber, protecting and mounting a pressure sensor and a displacement sensor on the support body, and arranging a sensor observation window on one side of the roadway;
step three, judging impact risk by supporting and protecting body resistance and displacement mutation in the window: and continuously observing the pressure and displacement conditions of the supporting body, and taking the pressure and displacement conditions of the supporting body of the multiple chambers as impact risk early warning when sudden change occurs.
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 manual window intervention technology is adopted, a plurality of chambers are constructed in a danger testing area, supporting bodies are arranged in the chambers, pressure and displacement sensors are installed, the pressure and displacement changes of the supporting bodies are monitored, and the influence of the separation layer top plate is avoided;
3. the real-time early warning of the impact danger is carried out by continuously observing the ore pressure and displacement changes of the supporting body and combining with dynamic display (micro-shock and the like) and carrying out sudden change on the resistance and the displacement of the supporting bodies of the chambers.
Drawings
Fig. 1 is a schematic view of an impact hazard zone, fig. 2 is a schematic view of a chamber design, and fig. 3 is a supporting body resistance and displacement curve.
Detailed Description
The embodiment of the invention provides a method for judging impact risk of an abscission roof stope by using a window intervention method, which comprises the following steps:
firstly, determining an impact danger area according to geological mining conditions of a sublevel roof stope, impact ground pressure danger evaluation reports and other data and by combining specific mine pressure observation data, wherein the figure is shown in figure 1;
secondly, expanding the sides of the roadway of the impact danger area, constructing an underground chamber, arranging a strut in the underground chamber, and requiring the strut not to drill the bottom, installing a pressure sensor and a displacement sensor, wherein 1 is the roadway, 2 is the underground chamber, 3 is the strut, and 4 is a dynamic instrument, which is shown in figure 2;
and thirdly, continuously observing the pressure and displacement change conditions of the support body under static and dynamic loads, judging the impact danger degree according to the pressure and displacement sudden change by combining the dynamic showing condition, and 5, showing an observation curve (sudden change), wherein the observation curve is 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 judging impact risk of a separation roof stope by a window intervention method 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 data;
step two, a manual window intervention technology: for a stope of a separation roof, performing chamber construction of a roadway side in a dangerous area, then presetting a support body in the chamber, protecting and mounting a pressure sensor and a displacement sensor on the support body, and arranging a sensor observation window on one side of the roadway;
step three, judging impact risk by supporting and protecting body resistance and displacement mutation in the window: and continuously observing the pressure and displacement conditions of the supporting body, and taking the pressure and displacement conditions of the supporting body of the multiple chambers as impact risk early warning when sudden change occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504935.5A CN112483179A (en) | 2020-12-18 | 2020-12-18 | Method for judging impact risk of roof stope of separation layer by window intervention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504935.5A CN112483179A (en) | 2020-12-18 | 2020-12-18 | Method for judging impact risk of roof stope of separation layer by window intervention method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112483179A true CN112483179A (en) | 2021-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011504935.5A Pending CN112483179A (en) | 2020-12-18 | 2020-12-18 | Method for judging impact risk of roof stope of separation layer by window intervention method |
Country Status (1)
| Country | Link |
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| CN (1) | CN112483179A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233777A (en) * | 2013-05-17 | 2013-08-07 | 上海大屯能源股份有限公司 | Safe mine pressure monitoring method and device for roof |
| CN106353199A (en) * | 2016-10-20 | 2017-01-25 | 山东科技大学 | Method for field real-time monitoring of creep type rock burst risk |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN110359959A (en) * | 2019-06-19 | 2019-10-22 | 中国矿业大学 | A kind of coal working face gas bearing capacity and advanced stress rapid assay methods |
| CN110905402A (en) * | 2019-11-13 | 2020-03-24 | 山东科技大学 | Pressure relief hole construction method based on mining induced stress dynamic monitoring |
| CN111691921A (en) * | 2020-05-30 | 2020-09-22 | 山东思科赛德矿业安全工程有限公司 | Rock burst online monitoring system and method based on support resistance monitoring |
-
2020
- 2020-12-18 CN CN202011504935.5A patent/CN112483179A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233777A (en) * | 2013-05-17 | 2013-08-07 | 上海大屯能源股份有限公司 | Safe mine pressure monitoring method and device for roof |
| CN106353199A (en) * | 2016-10-20 | 2017-01-25 | 山东科技大学 | Method for field real-time monitoring of creep type rock burst risk |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN110359959A (en) * | 2019-06-19 | 2019-10-22 | 中国矿业大学 | A kind of coal working face gas bearing capacity and advanced stress rapid assay methods |
| CN110905402A (en) * | 2019-11-13 | 2020-03-24 | 山东科技大学 | Pressure relief hole construction method based on mining induced stress dynamic monitoring |
| CN111691921A (en) * | 2020-05-30 | 2020-09-22 | 山东思科赛德矿业安全工程有限公司 | Rock burst online monitoring system and method based on support resistance monitoring |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210312 |
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| RJ01 | Rejection of invention patent application after publication |