CN102587983B - Comprehensive early-warning observation method for coal mine rock burst - Google Patents
Comprehensive early-warning observation method for coal mine rock burst Download PDFInfo
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Abstract
The invention discloses a comprehensive early-warning observation method for coal mine rock burst. The method includes the steps: firstly, obtaining the range of a high stress field of a rock burst coal bed; secondly, manually intervening and observing the disturbance range; and finally, performing all-dimensional dynamic monitoring. Comprehensive monitoring is realized by closely associating overburden rock movement damage of a mining face with the size and distribution of the stress field, so that the risk of rock burst is forecast, warning measures are timely taken, and rock burst accidents are avoided.
Description
Technical field
The invention belongs to the Coal Mining Technology field.
Background technology
Bump is one of natural calamity the most serious in the interior colliery of world wide.The coal seam in the most of mines of China and rock stratum all have Burst Tendency in various degree, under certain critical depth, coal petrography impacts very serious, particularly along with the China's coal-mine mining depth with every year about 20m the degree of depth constantly increase, bump is more and more serious, has become one of main disaster incidents of restriction China mine production and safety.Although Chinese scholars, aspect the researchs such as bump genesis mechanism, monitoring means and control technology, having obtained impressive progress, also is far from fundamentally solving its effective prediction and prevention problem.The China's coal-mine mine was built in for five sixties mostly, and along with passage of time and exploitation of mineral resources are shifted to deep, these mines will enter deep mining, and the rock blast hazard problem will be more seriously, more outstanding, more general.
At Prediction of Rock Burst and aspect preventing and treating, because the time space distribution to exploiting rear movement Changing Pattern and face surrounding rock stress field is unclear, the decision theory imperfection of developing and back production, digging design at rock burst coal seam at present relies on the statistics experience to carry out decision-making basically, thereby often appear in the region of high stress, carry out mining work in isolated island and half isolated island coal column, provide power source condition for bump.Due to inward nature's rule of the coal-rock-impacting damage layer process under the complicated heavily stressed and large Conditions of Buried Depth that is not sure, thus impact time, place and the intensity etc. of Hair Fixer life do not reach the degree of quantitative expectation; The information acquiring technology that the bump mine generally adopts, its test parameter imperfection, the information of monitoring is also very unreliable, can only carry out the qualitative monitoring of bump; To the information that monitors not theoretically, experimentally, carry out integrated treatment on method, the reliability of its feedback information impact ground pressure prediction is poor.So bump control at present is comprehensive control, causes the waste of a large amount of human and material resources, greatly affects organism of production, has reduced production efficiency.Aspect the Prediction of Rock Burst forecast, the research of this respect has in recent years obtained great progress, but aspect the quantitative observation at dynamic stress scope, region of high stress energy release characteristic, also do not form system, reliable observation procedure, particularly under the deep-well condition, the emollescence of rock stratum is obvious, and the judgment criterion of its dynamic stress scope is difficult to set up, and current observation method and method are difficult to obtain quantitative value.。
So the mining Design of China's coal-mine rock burst coal seam and enforcement still rest on the motion of exploitation overlying strata and the unclear developing stage of the Stress Field Distribution rule of development.This is that current coal mine rock burst accident is frequent, and particularly serious disasters and accidents are fundamentally not controlled, one of major reason that the exploitation economic benefit is low.Theoretical research and production practices prove, together with the bump accident is nearly all destroyed with the motion of getting working face overlying strata and stress field stress intensity and distributing maintains close ties with.
Summary of the invention
The objective of the invention is, for improving the integrity problem of coal mine rock burst danger forecasting, to propose a kind of comprehensive pre-warning observation procedure.
The technical scheme that the present invention takes is:
The first step: heavily stressed the scope that obtains rock burst coal seam
In rock burst coal seam working face mining process, at first in stope drift active workings along the work plane direction of advance, arrange a roof dynamic monitor at interval of 10-20 rice, carry out the Continuous Observation speed of crushing, thereby obtain the place of the velocity jump that crushes; Then progressively dwindle the spacing distance of roof dynamic monitor in this place, continue the Continuous Observation speed of crushing, until approach leading pressure limit value accurately, this scope is defined as heavily stressed scope of top board.
Second step: human intervention observation range of disturbance
In stope drift active workings, from heavily stressed field edge, start, arrange a high sensitive stress meter along the work plane direction of advance at interval of 5-10m, arrange more than 4; And 3-5 hole bored, pitch of holes 3-5m, hole depth 8-10 rice, the explosive of packing in hole, onepull in the peak stress position in the scope of dynamic stress field in coal seam; After explosion, detonation wave is propagated and decay gradually in coal seam, and the stress wave data are arrived in high sensitive stress meter observational record simultaneously, thereby determines the exergonic range of disturbance in dynamic pressure district according to the size of every stress wave demonstration data.
The 3rd step: comprehensive dynamic monitoring
In above-mentioned definite heavily stressed field scope and the tunnel in range of disturbance, layout is buried many group sensitive pressure sensor underground, spacing between group and group is decided to be 20-40m according to stress distribution law, every group of 2-3 sensitive pressure sensor burying 2-3 spacing 0.5m underground, and every group sensor on different depth; At first hole in country rock while burying underground, sensitive pressure sensor is cast in boring, and sensor signal is transferred on data collection processor; In working face mining, data collection processor is processed the delta data of stress field in time, when reaching the early-warning parameters of system setting, is reported to the police, thereby realizes the dangerous monitoring and warning of coal mine rock burst.
Good effect of the present invention is: by the motion of getting working face overlying strata is destroyed together with stress field stress intensity and the close ties that distribute and carries out comprehensive monitoring, thereby dope the also dangerous and alarm measure that bump occurs, avoid the generation of bump peril.
The accompanying drawing explanation
Fig. 1 is that roof dynamic monitor of the present invention is arranged and dynamic stress field schematic diagram;
Fig. 2 is that human intervention of the present invention brings out and the instrumentation allocation schematic diagram;
Fig. 3 is the comprehensive dynamic monitoring schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, enforcement of the present invention is described.
The first step: obtain dynamic stress field scope
As shown in Figure 1, in rock burst coal seam working face mining process, at first in stope drift active workings along the work plane direction of advance, arrange a roof dynamic monitor at interval of 10-20 rice, carry out the Continuous Observation speed of crushing, thereby obtain the place of the velocity jump that crushes; Then progressively dwindle the spacing distance of roof dynamic monitor in this place, continue the Continuous Observation speed of crushing, until approach leading pressure limit value accurately, this scope is defined as top board dynamic stress field scope.
Second step: human intervention deterministic disturbances scope
As shown in Figure 2, in stope drift active workings, driven stress field edge starts, and along the work plane direction of advance, at interval of 5-10m, arranges a high sensitive stress meter, arranges more than 4; And 3-5 hole bored, pitch of holes 3-5m, hole depth 8-10 rice, the explosive of packing in hole, onepull in the peak stress position in the scope of dynamic stress field in coal seam; After explosion, detonation wave is propagated and decay gradually in coal seam, and the stress wave data are arrived in high sensitive stress meter observational record simultaneously, thereby determines the exergonic range of disturbance in dynamic pressure district according to the size of every stress wave demonstration data.
The 3rd step: comprehensive dynamic monitoring
In above-mentioned definite heavily stressed field scope and the tunnel in range of disturbance, layout is buried some groups of sensitive pressure sensor underground, as shown in Figure 3, spacing between group and group is decided to be 20-40m according to stress distribution law, every group of 2-3 sensitive pressure sensor burying 2-3 spacing 0.5m underground, and every group sensor on different depth; At first hole in country rock while burying underground, sensitive pressure sensor is cast in boring, and sensor signal is transferred on data collection processor; In working face mining, data collection processor is processed the delta data of stress field in time, when reaching the early-warning parameters of system setting, is reported to the police, thereby realizes the dangerous monitoring and warning of coal mine rock burst.
Claims (1)
1. a coal mine rock burst comprehensive pre-warning observation procedure, is characterized in that,
The first step: heavily stressed the scope that obtains rock burst coal seam
In rock burst coal seam working face mining process, at first in stope drift active workings along the work plane direction of advance, arrange a roof dynamic monitor at interval of 10-20 rice, carry out the Continuous Observation speed of crushing, thereby obtain the place of the velocity jump that crushes; Then progressively dwindle the spacing distance of roof dynamic monitor in this place, continue the Continuous Observation speed of crushing, until approach leading pressure limit value accurately, this scope is defined as heavily stressed scope of top board;
Second step: human intervention observation range of disturbance
In stope drift active workings, from heavily stressed field edge, start, arrange a high sensitive stress meter along the work plane direction of advance at interval of 5-10m, arrange more than four; And 3-5 hole bored, pitch of holes 3-5m, hole depth 8-10 rice, the explosive of packing in hole, onepull in the peak stress position in the scope of dynamic stress field in coal seam; After explosion, detonation wave is propagated and decay gradually in coal seam, and the stress wave data are arrived in high sensitive stress meter observational record simultaneously, thereby determines the exergonic range of disturbance in dynamic pressure district according to the size of every stress wave demonstration data;
The 3rd step: comprehensive dynamic monitoring
In above-mentioned definite heavily stressed field scope and the tunnel in range of disturbance, layout is buried many group sensitive pressure sensor underground, spacing between group and group is decided to be 20～40m according to stress distribution law, every group of sensitive pressure sensor of burying 2-3, spacing 0.5m underground, and every group sensor on different depth; At first hole in country rock while burying underground, sensitive pressure sensor is cast in boring, and sensor signal is transferred on data collection processor; In working face mining, data collection processor is processed the delta data of stress field in time, when reaching the early-warning parameters of system setting, is reported to the police, thereby realizes the dangerous monitoring and warning of coal mine rock burst.
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| CN102587983B true CN102587983B (en) | 2013-12-25 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103256073B (en) * | 2013-04-28 | 2015-07-29 | 中国矿业大学 | Underground coal mine impact mine pressure partition grading prediction method |
| CN103306722B (en) * | 2013-06-21 | 2015-08-05 | 中国矿业大学 | Micro-seismic multi-dimensional information comprehensive region detection and evaluation method for impact danger region |
| CN104763470B (en) * | 2015-03-27 | 2017-03-08 | 辽宁工程技术大学 | A mining hole multi objective intelligent early-warning bump system and method |
| CN105275495B (en) * | 2015-09-30 | 2017-08-29 | 山东科技大学 | A kind of method for judging shock wave harmfulness |
| CN106437702B (en) * | 2016-10-20 | 2018-06-19 | 山东科技大学 | Soft seam tunnel is met head on the monitoring method of bump danger |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN108871641A (en) * | 2018-07-03 | 2018-11-23 | 中国矿业大学(北京) | The prediction technique of bump risk in a kind of exploitation of coal mine underground |
| CN109798106B (en) * | 2018-11-13 | 2022-09-20 | 辽宁工程技术大学 | Method for predicting risk of rock burst and prevention and treatment measures |
| CN110905528A (en) * | 2019-12-13 | 2020-03-24 | 山东科技大学 | Method for repairing rock burst dangerous roadway by strong disturbance and segmentation |
| CN112483178A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of deep syncline shaft part stope by large window destruction method |
| CN112540400A (en) * | 2020-12-18 | 2021-03-23 | 山东科技大学 | Fracture zone dynamic pressure display strength and weakness degree judgment method |
| CN115234303A (en) * | 2022-07-28 | 2022-10-25 | 华北科技学院 | Method and device for predicting rock burst danger by fixed-force drill cuttings |
| CN116484186B (en) * | 2023-04-13 | 2023-09-08 | 煤炭科学研究总院有限公司 | Multi-field coupling-based rock burst intelligent early warning method and device |
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| SU1645558A2 (en) * | 1989-05-31 | 1991-04-30 | Институт Физики И Механики Горных Пород Ан Киргсср | Method of preventing tectonic and rock bumps |
| US5233568A (en) * | 1991-06-28 | 1993-08-03 | Atlantic Richfield Company | Geopressure analysis system |
| CN101936162B (en) * | 2010-04-16 | 2012-04-18 | 兖州煤业股份有限公司 | Method for preventing rock burst of bottom plate of layered tunnel in tectonic stress region of coal mine |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
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