CN104074547A - Coal mine mining roadway rock burst early warning method - Google Patents
Coal mine mining roadway rock burst early warning method Download PDFInfo
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- CN104074547A CN104074547A CN201410298992.0A CN201410298992A CN104074547A CN 104074547 A CN104074547 A CN 104074547A CN 201410298992 A CN201410298992 A CN 201410298992A CN 104074547 A CN104074547 A CN 104074547A
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Abstract
The invention relates to a coal mine mining roadway rock burst early warning method, which comprises the following steps that: (a) a mining roadway to be subjected to early warning is subjected to coal body sample collection; coal body samples are subjected to uniaxial compression destruction test; a dynamic destruction curve of a coal body is obtained; and the dynamic destruction stress exponent Cd of the coal body is obtained through calculation; and (b) a coal body stress monitoring system is arranged in the mining roadway to be subjected to early warning; the coal body impact destruction stress exponent Dd is obtained through real-time calculation according to stress data obtained through monitoring; the dynamic destruction stress exponent Cd of the coal body obtained in the step (a) is used as an early warning value; and if the Dd value obtained through calculation is greater than or equal to the Cd value, the mining roadway to be subjected to early warning is considered to have obvious rock burst danger. The coal mine mining roadway rock burst early warning method has the advantages that the operation is simple; the manufacturing cost is low; and the early warning effect is obviously improved.
Description
Technical field
The present invention relates to a kind of bump method for early warning, method for early warning is pressed on especially a kind of stope of coal mines roadway bump ground.
Background technology
Bump is that a kind of elastic energy sudden outburst gathering in digging activity due to coal and rock of occurring under coal mine causes coal and rock moment to be dished out, tunnel destroys the even dynamic disaster of casualties.Bump be that coal body focuses on the external manifestation that Sudden failure to a certain degree occurs afterwards at stress, it is a kind of means of carrying out bump early warning that the stress of coal body and variation thereof are monitored.
But conventional method for early warning is because warning index selection is improper at present, and early warning effect is unsatisfactory.
Summary of the invention
The invention provides stope of coal mines roadway bump that a kind of simple to operate, low cost of manufacture, early warning successful improve and press method for early warning.
The technical solution used in the present invention is as follows:
Method for early warning is pressed on stope of coal mines roadway bump ground, comprises the steps:
(a) to intending early warning stope drift active workings, carry out coal body sample collection, coal body sample is carried out to uniaxial compression rupture test, obtain the dynamic failure curve of coal body, calculate the dynamic failure stress exponent Cd of coal body; The dynamic failure stress exponent Cd of coal body refers in uniaxial compression test, the ultimate strength of coal and the difference of residual strength and the ratio of dynamic failure time, unit is MPa/ms, wherein, the dynamic failure time refers to that the standard specimen of coal is under uniaxial compressed state, from ultimate strength to destroying the time of experiencing completely, the dynamic failure time of coal body is an important indicator that characterizes its Burst Tendency, has the dynamic failure time of Burst Tendency coal body generally all lower than 500ms.
(b) in intending early warning stope drift active workings, arrange stress in coal bed monitoring system, the stress data obtaining according to monitoring calculates coal body impact failure stress exponent Dd in real time, and the dynamic failure stress exponent Cd of the coal body that step (a) is obtained is as early warning value, if the Dd value calculating is more than or equal to Cd value, think that intending early warning stope drift active workings exists obvious bump dangerous.Coal body impact failure stress exponent Dd refers to that intending early warning stope drift active workings two helps the stress in coal bed sudden change value of coal body dynamic breaking moment and the ratio of time to rupture, and unit is MPa/ms.
Above-mentioned stope of coal mines roadway bump press in method for early warning, the coal body sample that step (a) gathers is no less than 7.
Above-mentioned stope of coal mines roadway bump press in method for early warning, the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is Millisecond.
Above-mentioned stope of coal mines roadway bump press in method for early warning, the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is 10ms-500ms.
Above-mentioned stope of coal mines roadway bump press method for early warning, the strain gauge quantity n that the stress in coal bed monitoring system that step (b) is arranged comprises determines by stope drift active workings place face roof periodic weighting step pitch Lz and work plane strike length Lt, i.e. n=[Lt/Lz].Face roof periodic weighting step pitch obtains through analog computation.
Above-mentioned stope of coal mines roadway bump press method for early warning, the stress in coal bed monitoring system that step (b) is arranged is carried out simulation and forecast to surrounding rock of actual mining roadway coal body lateral-supporting pressure peak before layout, when arranging, all strain gauges are arranged in lateral-supporting pressure stresses peak point position.
Technique scheme of the present invention has the following advantages compared to existing technology:
1. method for early warning is pressed on stope of coal mines roadway bump provided by the invention ground, and owing to only adopting a warning index, monitoring instrument is arranged few, and transmission structure is simple, and control program is simple, and therefore, the present invention is in practical operation is used, very simple and convenient.
2. method for early warning is pressed on stope of coal mines roadway bump provided by the invention ground, owing to directly adopting coal body impact failure stress exponent as warning index, and the coal body dynamic failure stress exponent of answering is in contrast directly to reflect coal body Burst Tendency, therefore, early warning successful of the present invention improves.
3. method for early warning is pressed on stope of coal mines roadway bump provided by the invention ground, owing to only need to passing through collection in worksite coal body sample, laboratory dynamic failure test, utilize the easy steps such as monitoring equipment monitoring coal body impact failure stress exponent, and do not need to drop into expensive, a large amount of monitoring equipments, grade monitoring equipment reality is ripe, does not also need to drop into a large amount of manpowers, therefore, the present invention greatly reduces bump early warning cost.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Method for early warning is pressed on described stope of coal mines roadway bump ground, comprises the steps:
(a) to intending early warning stope drift active workings, carry out coal body sample collection, coal body sample carried out to uniaxial compression rupture test, obtain the dynamic failure curve of coal body, calculate the dynamic failure stress exponent Cd of coal body:
(b) in intending early warning stope drift active workings, arrange stress in coal bed monitoring system, the stress data obtaining according to monitoring calculates coal body impact failure stress exponent Dd in real time, and the dynamic failure stress exponent Cd of the coal body that step (a) is obtained is as early warning value, if the Dd value calculating is more than or equal to Cd value, think that intending early warning stope drift active workings exists obvious bump dangerous.
In the present embodiment, the coal body sample that step (a) gathers is no less than 7, preferably 9.
In the present embodiment, the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is Millisecond.
In the present embodiment, the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is 10ms-500ms, preferably 100ms.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among protection scope of the present invention.
Claims (5)
1. method for early warning is pressed on stope of coal mines roadway bump ground, it is characterized in that: comprise the steps:
(a) to intending early warning stope drift active workings, carry out coal body sample collection, coal body sample is carried out to uniaxial compression rupture test, obtain the dynamic failure curve of coal body, calculate the dynamic failure stress exponent Cd of coal body;
(b) in intending early warning stope drift active workings, arrange stress in coal bed monitoring system, the stress data obtaining according to monitoring calculates coal body impact failure stress exponent Dd in real time, and the dynamic failure stress exponent Cd of the coal body that step (a) is obtained is as early warning value, if the Dd value calculating is more than or equal to Cd value, think that intending early warning stope drift active workings exists obvious bump dangerous.
2. method for early warning is pressed on stope of coal mines roadway bump according to claim 1 ground, it is characterized in that: the coal body sample that step (a) gathers is no less than 7.
According to the arbitrary described stope of coal mines roadway bump of claim 1-2 press method for early warning, it is characterized in that: the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is Millisecond.
4. method for early warning is pressed on stope of coal mines roadway bump according to claim 3 ground, it is characterized in that: the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is 10ms-500ms.
5. method for early warning is pressed on stope of coal mines roadway bump according to claim 4 ground, it is characterized in that: the stress in coal bed monitoring system monitoring frequency that step (b) is arranged is 100ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410298992.0A CN104074547B (en) | 2014-06-25 | 2014-06-25 | Coal mine mining roadway rock burst early warning method |
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| CN201410298992.0A CN104074547B (en) | 2014-06-25 | 2014-06-25 | Coal mine mining roadway rock burst early warning method |
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| CN104074547A true CN104074547A (en) | 2014-10-01 |
| CN104074547B CN104074547B (en) | 2017-02-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| US5668325A (en) * | 1996-03-27 | 1997-09-16 | Cyprus Amax Coal Company | Method and apparatus for determining compressive stress in pillars |
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| CN203296821U (en) * | 2013-06-21 | 2013-11-20 | 北京微赛思技术有限公司 | Mine disaster multi-factor micro-seismic monitoring system |
| CN103410565A (en) * | 2013-03-14 | 2013-11-27 | 天地科技股份有限公司 | Monitoring system and early warning method for rock burst multi-parameter process |
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2014
- 2014-06-25 CN CN201410298992.0A patent/CN104074547B/en active Active
Patent Citations (4)
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| US5668325A (en) * | 1996-03-27 | 1997-09-16 | Cyprus Amax Coal Company | Method and apparatus for determining compressive stress in pillars |
| CN102644482A (en) * | 2012-05-18 | 2012-08-22 | 河南大有能源股份有限公司 | Rock burst predicting and warning method |
| CN103410565A (en) * | 2013-03-14 | 2013-11-27 | 天地科技股份有限公司 | Monitoring system and early warning method for rock burst multi-parameter process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN104074547B (en) | 2017-02-08 |
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