Micro-seismic identification method based on coal petrography impact instability mode

An identification method and microseismic technology, applied in seismology, seismic measurement, seismic signal processing, etc., can solve problems such as limited applicability, non-coplanar movement directions of rupture surfaces, and unclear physical meaning of moment tensor decomposition components.

Active Publication Date: 2016-11-23
CHINA UNIV OF MINING & TECH
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Problems solved by technology

On the basis of microseismic monitoring, the current moment tensor method to analyze the focal mechanism of coal mine stope microseismic focal mechanism mainly has the following problems: the physical meaning of the moment tensor decomposition components is not clear, the applicability is limited, and there are a large number of non-shear fractures in rock burst events Form seismic source, it is necessary to consider issues such as the movement direction of the rupture surface and the non-coplanarity of the rupture surface

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  • Micro-seismic identification method based on coal petrography impact instability mode
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  • Micro-seismic identification method based on coal petrography impact instability mode

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[0079] Figure 1~4 It is the best embodiment of the present invention, below in conjunction with attached Figure 1~4 The present invention will be further described.

[0080] Such as figure 1 As shown, a microseismic identification method for coal rock impact instability mode, including the following steps:

[0081] Step 1001, arrange the microseismic recorder.

[0082] Set up at least 6 microseismic recorders at different positions in the same stope to monitor the stope, and each microseismic recorder forms a microseismic signal record.

[0083] Step 1002, select 6 relatively clear microseismic waveforms from the microseismic records monitored by the microseismic recorder.

[0084] In step 1002, a clear seismic waveform means that there is an obvious main vibration in the waveform, and the microseismic waveform is preferably screened from a microseismic recorder within 2 km from the mining area.

[0085] Step 1003, calculating the source far-field displacement.

[0086...

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Abstract

The invention, which belongs to the technical field of the micro-seismic characteristic analysis of the impact rock pressure, provides a micro-seismic identification method based on a coal petrography impact instability mode. The method comprises: step 1001, a plurality of microseismographs are arranged at different positions at a same stope to carry out micro-seismic monitoring and each microseismograph forms a micro-seismic signal record; step 1002, a plurality of micro-seismic waveforms are screened among the micro-seismic records monitored by the microseismographs; step 1003, on the basis of a focus far-field displacement calculation step, a focus far-field displacement value of each micro-seismic waveform is calculated; step 1004, calculation is carried out to obtain a focus moment tensor; step 1005, the focus moment tensor obtained by calculation at the step 1004 is decomposed; and step 1006, the focus moment tensor after decomposition at the step 1005 is analyzed to obtain a focus fracture mode, focus P and T axes, and focus fracture plane occurrence.

Description

technical field [0001] The invention discloses a microseismic identification method for a coal rock burst instability mode, which belongs to the technical field of microseismic characteristic analysis of rock burst. Background technique [0002] Mining pressure disaster is a kind of mine earthquake induced by mining, which not only causes damage to shafts, personnel injuries, and damage to buildings on the ground, but also causes gas and coal dust explosions. Due to the complex diversity and suddenness of the time, place, and location of such disasters, their prevention, especially prediction, is a worldwide problem. [0003] At present, the monitoring and early warning methods of rock burst mainly include: microseismic monitoring, electromagnetic radiation monitoring, acoustic emission monitoring, drilling cuttings monitoring, working face rock pressure monitoring, mining stress monitoring, etc. In particular, the microseismic monitoring method can monitor the entire mine ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/00G01V1/28
CPCG01V1/008G01V1/288G01V2210/63
Inventor 曹安业井广成窦林名刘赛王常彬姚肖肖
Owner CHINA UNIV OF MINING & TECH
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