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Micro-seismic multi-parameter early warning method for rock burst

A rockburst, multi-parameter technology, used in earth-moving drilling, mining equipment, mining equipment, etc., can solve the problems of single index, low safety, and prominent economic disadvantages.

Inactive Publication Date: 2014-11-19
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method of using mine pressure to predict rockburst has relatively large limitations. Most of the methods using microseismic monitoring have single indicators and low early warning accuracy; time-consuming and laborious, personnel need to record on site, low safety, and prominent economic disadvantages

Method used

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  • Micro-seismic multi-parameter early warning method for rock burst
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Embodiment Construction

[0043] The present invention will be further described below in conjunction with embodiment.

[0044] Concrete steps of the present invention are:

[0045] A: Install a microseismic monitoring system in the mine;

[0046] B: Use the mine microseismic monitoring system to measure the microseismic energy and frequency, calculate the total fault area A(t), the missing b value, and the Z-MAP value, and record the four microseismic signals; among them,

[0047] Total fault area A(t): between frequency and energy, according to Obtain the value of A(t); among them, N(k) is the number of microseisms with energy level k in the interval from time t to t+△t, that is, the number of microseisms with elastic wave energy between 10k and 10k+1, and k0 is The lower limit of the counted microseisms, k is the energy level of each microseism;

[0048] Z-Map value: By analyzing the changes in the average magnitude samples, we can understand the average changes in different periods of the study a...

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Abstract

The invention discloses a micro-seismic multi-parameter early warning method for rock burst. The micro-seismic multi-parameter early warning method for the rock burst comprises the steps that a micro-seismic monitoring system is installed in a mine; the micro-seismic energy and the micro-seismic frequency are measured by means of the micro-seismic monitoring system in the mine, the total area A(t) of a fault, the quake absence b value and the Z-MAP value are calculated, and the four microquake signals are recorded; the obtained data are analyzed, and four evolution charts, namely the energy and frequency time sequence chart, the fault total area evolution chart, the quake absence b value evolution chart and the Z-MAP evolution value chart, are drawn; whether the situation that the mine earthquake frequency is reduced and the energy is increased, the situation that the fault total area value is abnormally high, the situation that the quake absence b value is abnormally low and the situation that the absolute value of Z is larger than two apprear in the same period of time is analyzed according to the drawn evolution charts, and if two to four of the four situations appear in the same period of time, it is judged that the situation of rock burst can occur. The micro-seismic multi-parameter early warning method for the rock burst has the advantage that the accuracy of early warning of rock burst is improved.

Description

technical field [0001] The invention relates to a microseismic multi-parameter early warning method for rock burst, and belongs to the technical field of microseismic monitoring and early warning. Background technique [0002] In recent years, with the increasing depth of coal mining in my country, the problem of rock burst in many mining areas has become more and more serious. The pressure in the coal mine rock burst pressure exceeds the strength limit, and the energy accumulated in the coal rock mass around the roadway or stope is suddenly released, and an explosive accident occurs in the shaft roadway. It is a kind of mine earthquake induced by mining, and it is also a kind of disaster. It not only causes damage to shafts, casualties, and damage to ground buildings, but also causes gas, coal dust explosions and floods, interferes with the ventilation system, and seriously threatens the production of coal mines. Safety. Due to the complexity and suddenness of such disast...

Claims

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Application Information

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IPC IPC(8): E21F17/18
Inventor 陆菜平刘广建张农刘洋左源耀
Owner CHINA UNIV OF MINING & TECH
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