CN102392685A - Dense roadway group rock burst hazard prediction method - Google Patents
Dense roadway group rock burst hazard prediction method Download PDFInfo
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- CN102392685A CN102392685A CN2011102829114A CN201110282911A CN102392685A CN 102392685 A CN102392685 A CN 102392685A CN 2011102829114 A CN2011102829114 A CN 2011102829114A CN 201110282911 A CN201110282911 A CN 201110282911A CN 102392685 A CN102392685 A CN 102392685A
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Abstract
The invention discloses a dense roadway group rock burst hazard prediction method. The method includes the following steps: first acquiring the dynamic sensitive area of a coal bed in a dense roadway group area; then mounting roof dynamics monitors along a direction leading to a dense roadway group to carry out roof dynamics observation; before a dynamic area stress range related to coal mining gets close to the dense roadway group, mounting highly sensitive stressmeters in the sensitive area to observe stress change, and when the stress increment is abruptly changed, carrying out rock burst hazard monitoring. By means of an artificial blasting technique in the dense roadway group, the method acquires the coal-rock stratum disturbance-sensitive area, finding a vulnerable area; the roof dynamics method is adopted to acquire the tendency characteristics and range of dynamic stress and quantitatively describe the distribution rule of the dynamic stress; delicate physical quantity observation timely judges the early disturbance response of the dense roadway group, rock burst hazard process monitoring is carried out before high energy is released, and the hazard level is judged by means of indexes.
Description
Technical field
The invention belongs to the coal mining technical field.
Background technology
The prediction of compressing into to impact capable science is the key of bump control.The research of this respect has in recent years obtained some progress.Monitoring technology mainly comprises the following aspects at present.
The drilling cuttings method: the bearing pressure distribution characteristics, i.e. bearing pressure peak value size and apart from the distance of rib, its mensuration generally adopts the drilling cuttings method to survey.The drilling cuttings method is through in the coal seam, playing the boring of diameter 42～50mm, according to coal dust amount and the Changing Pattern and relevant dynamic effect of discharging, identifies a kind of method of danger of burst.
Acoustic emission (rock noise) and micro seismic monitoring: rock noise and micro seismic monitoring method are with development of electronic technology, especially the widespread usage of electronic computer and developed a kind of bump prediction methods.
The stress prediction method: the STRESS VARIATION of coal body is the key of predicting rock burst; The measurement of STRESS VARIATION is the basis of realizing the bump danger forecasting; Adopt borehole stressmeter to carry out the monitoring of STRESS VARIATION at present mostly; But because the rigidity of stress monitoring body and the rigidity of coal body do not match, its data monitored can not be represented the true stress of coal body.The Quantitative Monitoring that stress in coal bed changes is the key technology for prediction of bump.
Other Forecasting Methodology: like the exploitation criterion, the rock noise detection method that flows, coal seam change of moisture content observation method, coal seam pressure from surrounding rock (distortion) observation method and hammering wave velocity method etc.
Though the prediction of bump has obtained significant progress theoretical and technical; But because the randomness of the complexity of the occurrence cause of bump and condition, bump generation and diversity, development in science and technology level and people's understanding and the limitation of putting into practice sudden, mode of failure make often to produce little effect only according to a kind of method.As the case may be, analyze again on the basis of geological conditions and production specifications, adopt several different methods to carry out the main path that integrated forecasting has become present bump prediction.About intensive tunnel crowd's bump danger forecasting technology report not also, so the present invention's characteristics of plugging a gap.
Summary of the invention
The objective of the invention is problem, propose the reliable method of the intensive tunnel of a kind of responsive physical quantity integrated forecasting crowd's shock hazard to existence in the present deep mining bump prediction.
Deep mining of the present invention refers to the deep mining greater than 800 meters.
The technical scheme of intensive tunnel of the present invention crowd's bump danger forecasting method is:
The first step: obtain dynamic sensitizing range, coal seam
At first in zone that the dangerous seam mining of bump relates to; Particularly intensive tunnel crowd zone; Through analogy, face analysis, the judgement of stope bump presentation attributes mutually, adopt drilling cuttings method monitoring means to carry out the scene simultaneously and detect, mark off relative intensive tunnel crowd's high stress areas;
In high stress areas high sensitive stress meter is installed, is carried out artificial blasting vibration in comparatively safe zone then,, obtain the dynamic sensitizing range in coal seam through to the test of blasting vibration stress wave;
Second step: dynamic stress trend observation
Along with the digging activity is carried out, around intensive tunnel crowd, must cause disturbance, install Combined capacitor roof dynamic monitor in the direction of leading to intensive tunnel crowd this moment, carries out top board and dynamic observe, and obtains the disturbing influence scope;
The 3rd step: the trickle increment observation in sensitizing range
Before the approaching intensive tunnel crowd of the regional dynamic stress scope that seam mining relates to, high sensitive stress meter is installed in the sensitizing range, the observation STRESS VARIATION when sudden change appears in stress increment, is carried out the shock hazard monitoring to this zone;
The 4th step: sensitizing range shock hazard monitoring
Adopt drilling cuttings method, the stressed means of prop to carry out the shock hazard monitoring, and then dope the degree of danger of intensive tunnel crowd's bump.
Good effect of the present invention is: 1. through in the artificial blasting technique of intensive tunnel crowd, obtain coal rock layer disturbance sensitizing range, find weakness zone.
2. adopt the top board dynamic method to obtain dynamic stress trend characteristic and scope, the regularity of distribution of quantitative description top attitude stress.
3. trickle physical quantity is observed, and has in time judged intensive tunnel crowd's early stage disturbance response, before big energy discharges, carries out the process monitoring of shock hazard, judges degree of danger through index.
Description of drawings
Below in conjunction with description of drawings enforcement of the present invention
Fig. 1 is intensive tunnel, certain colliery crowd's administrative division map;
Fig. 2 is a dynamic stress distributive observation sketch map
Fig. 3 is that the sensitizing range monitoring instrument is arranged sketch map.
The specific embodiment
Intensive tunnel, certain colliery crowd's administrative division map with reference to shown in Figure 1 further specifies Forecasting Methodology of the present invention.
The first step: obtain the sensitizing range
Before certain working face mining; At first carry out the preliminary delimitation of bump deathtrap; In the zone that the dangerous seam mining of bump relates to, particularly intensive tunnel crowd zone is through analogy, face analysis, the judgement of stope bump presentation attributes mutually; Adopt drilling cuttings method monitoring means to carry out the scene simultaneously and detect, mark off relative intensive tunnel crowd's high stress areas;
In high stress areas high sensitive stress meter is installed, is carried out artificial blasting vibration in comparatively safe zone then,, obtain the dynamic sensitizing range in coal seam through to the test of blasting vibration stress wave.I among Fig. 1, II zone are dynamic sensitizing range.
Second step: dynamic stress trend observation
Along with the digging activity is carried out, around intensive tunnel crowd, must cause disturbance, install Combined capacitor roof dynamic monitor in the direction of leading to intensive tunnel crowd this moment, as shown in Figure 2, carries out top board and dynamic observe, and obtains the disturbing influence scope.
The 3rd step: the trickle increment observation in sensitizing range
Before the approaching intensive tunnel crowd of the regional dynamic stress scope that seam mining relates to, high sensitive stress meter is installed in the sensitizing range, as shown in Figure 3, A, B, C, D, E---be the stress monitoring instrument monitoring location; During the observation STRESS VARIATION, when sudden change appears in stress increment, the shock hazard monitoring is carried out in this zone.
The 4th step: sensitizing range shock hazard monitoring
Adopt drilling cuttings method, the stressed means of prop to carry out the shock hazard monitoring, and then dope the degree of danger of intensive tunnel crowd's bump.III among Fig. 3, IV are comparatively safe zone.
Claims (1)
1. intensive tunnel crowd's bump danger forecasting method is characterized in that step is following:
The first step: obtain the sensitizing range
At first in intensive tunnel crowd zone, through analogy, face analysis, the judgement of stope bump presentation attributes mutually, adopt drilling cuttings method monitoring means to carry out scene detection simultaneously, mark off relative intensive tunnel crowd's high stress areas;
In high stress areas high sensitive stress meter is installed, is carried out artificial blasting vibration in comparatively safe zone then,, obtain the dynamic sensitizing range in coal seam through to the test of blasting vibration stress wave;
Second step: dynamic stress trend observation
Along with the digging activity is carried out, around intensive tunnel crowd, must cause disturbance, install Combined capacitor roof dynamic monitor in the direction of leading to intensive tunnel crowd this moment, carries out top board and dynamic observe, and obtains the disturbing influence scope;
The 3rd step: the trickle increment observation in sensitizing range
Before the approaching intensive tunnel crowd of the regional dynamic stress scope that seam mining relates to, high sensitive stress meter is installed in the sensitizing range, the observation STRESS VARIATION when sudden change appears in stress increment, is carried out the shock hazard monitoring to this zone;
The 4th step: sensitizing range shock hazard monitoring
Adopt drilling cuttings method, the stressed means of prop to carry out the shock hazard monitoring, and then dope the degree of danger of intensive tunnel crowd's bump.
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| CN201110282911.4A CN102392685B (en) | 2011-09-12 | 2011-09-12 | Dense roadway group rock burst hazard prediction method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104533443A (en) * | 2014-10-29 | 2015-04-22 | 山东科技大学 | Hard roof mine impact ground pressure hazard risk prediction analysis method |
| CN105041306A (en) * | 2015-07-22 | 2015-11-11 | 山东科技大学 | Impact risk warning method on basis of multi-parameter critical coal dust quantity indexes |
| CN105275495A (en) * | 2015-09-30 | 2016-01-27 | 山东科技大学 | Method of judging hazard of shock waves |
| CN105626151A (en) * | 2016-02-28 | 2016-06-01 | 辽宁工程技术大学 | Coalmine stoping roadway impact ground pressure pre-warning method |
| CN106437702A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Method for monitoring head-on impact ground pressure danger of soft coal seam roadway |
| CN109883593A (en) * | 2019-03-15 | 2019-06-14 | 东北大学 | A kind of coal mine rock burst monitoring warning device |
| CN109886600A (en) * | 2019-03-06 | 2019-06-14 | 绍兴文理学院 | The method of monitoring and warning bifurcation of coal seam assembly section bump risk |
| CN110107358A (en) * | 2019-05-01 | 2019-08-09 | 山东科技大学 | A kind of a wide range of rock burst hazard prediction method during tunnelling |
| CN110878694A (en) * | 2019-12-13 | 2020-03-13 | 山东科技大学 | Protection method for mining-influenced impact dangerous roadway during overhaul |
| 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 |
| CN112483180A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of lateral large mining roof slab structure type by window intervention 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 |
| CN112554952A (en) * | 2020-12-18 | 2021-03-26 | 山东科技大学 | Method for judging impact risk of three hard coal seams by window strong-damage method |
| CN113719318A (en) * | 2021-08-25 | 2021-11-30 | 煤炭科学研究总院 | Roadway axial full-length impact risk evaluation and risk resolution method based on momentum principle |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533443A (en) * | 2014-10-29 | 2015-04-22 | 山东科技大学 | Hard roof mine impact ground pressure hazard risk prediction analysis method |
| CN105041306A (en) * | 2015-07-22 | 2015-11-11 | 山东科技大学 | Impact risk warning method on basis of multi-parameter critical coal dust quantity indexes |
| CN105275495A (en) * | 2015-09-30 | 2016-01-27 | 山东科技大学 | Method of judging hazard of shock waves |
| CN105275495B (en) * | 2015-09-30 | 2017-08-29 | 山东科技大学 | A kind of method for judging shock wave harmfulness |
| CN105626151A (en) * | 2016-02-28 | 2016-06-01 | 辽宁工程技术大学 | Coalmine stoping roadway impact ground pressure pre-warning method |
| CN105626151B (en) * | 2016-02-28 | 2018-04-24 | 辽宁工程技术大学 | Press method for early warning stope of coal mines roadway bump |
| CN106437702A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Method for monitoring head-on impact ground pressure danger of soft coal seam roadway |
| 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 |
| CN109886600A (en) * | 2019-03-06 | 2019-06-14 | 绍兴文理学院 | The method of monitoring and warning bifurcation of coal seam assembly section bump risk |
| CN109883593A (en) * | 2019-03-15 | 2019-06-14 | 东北大学 | A kind of coal mine rock burst monitoring warning device |
| CN109883593B (en) * | 2019-03-15 | 2021-04-06 | 东北大学 | Coal mine rock burst monitoring and early warning device |
| CN110107358A (en) * | 2019-05-01 | 2019-08-09 | 山东科技大学 | A kind of a wide range of rock burst hazard prediction method during tunnelling |
| CN110878694A (en) * | 2019-12-13 | 2020-03-13 | 山东科技大学 | Protection method for mining-influenced impact dangerous roadway during overhaul |
| 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 |
| CN112483180A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of lateral large mining roof slab structure type by window intervention 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 |
| CN112554952A (en) * | 2020-12-18 | 2021-03-26 | 山东科技大学 | Method for judging impact risk of three hard coal seams by window strong-damage method |
| CN113719318A (en) * | 2021-08-25 | 2021-11-30 | 煤炭科学研究总院 | Roadway axial full-length impact risk evaluation and risk resolution method based on momentum principle |
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