Rock burst forewarning comprehensive quantitative early warning method based on multiple slight shock parameters

A rockburst and precursor technology is applied in the field of comprehensive quantitative early warning of rockburst precursors based on multi-microseismic parameters to achieve accurate early warning.

Active Publication Date: 2014-08-13
中铁二十四局集团福建铁路建设有限公司 +1
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Problems solved by technology

Due to the complexity of the causes of rockbursts and the non-linear behavior of their mechanism, it is very difficult and limited to use a single parameter for early warning of rockbursts.

Method used

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  • Rock burst forewarning comprehensive quantitative early warning method based on multiple slight shock parameters
  • Rock burst forewarning comprehensive quantitative early warning method based on multiple slight shock parameters
  • Rock burst forewarning comprehensive quantitative early warning method based on multiple slight shock parameters

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Embodiment Construction

[0015] see figure 1 , the present invention is based on the comprehensive quantitative early warning method of rockburst precursors based on multiple microseismic parameters, and calculates the rockburst occurrence probability P according to the following formula:

[0016] P=P 1 +P 2 +P 3

[0017]

[0018]

[0019]

[0020] Among them, P 1 ,P 2 ,P 3 Respectively represent the first, second and third sub-item probabilities; D represents the ratio of the microseismic event rate, e Indicates the microseismic energy multiplier, ρ e Indicates the localization event cluster density; Y 1 , Y 2 , Y 3 Respectively represent the preset first, second and third early warning indicators; a 1 、a 2 、a 3 represent the weights of the first, second and third sub-items respectively, in this embodiment, a 1 =0.3, a 2 =0.4, a 3 =0.3.

[0021] According to the calculated rockburst occurrence probability P, the rockburst precursor warning is carried out.

[0022] In this...

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Abstract

The invention relates to a rock burst forewarning comprehensive quantitative early warning method based on multiple slight shock parameters. The rock burst occurrence probability P is calculated according to the following formula of P=P1+P2+P3 (please see the specific formula in the specifications), wherein P1, P2 and P3 represent a first subentry probability, a second subentry probability and a third subentry probability respectively, D represents slight shock event frequency multiple proportions, e represents slight shock energy multiple proportions, rho e represents locating event cluster density, Y1, Y2 and Y3 represent a first preset early warning index, a second preset early warning index and a third preset early warning index respectively, and a1, a2 and a3 represent a first subentry weight, a second subentry weight and a third subentry weight respectively. Rock burst forewarning early warning is conducted according to the size of the rock burst occurrence probability P obtained through calculation.

Description

technical field [0001] The invention relates to the technical field of rockburst early warning, in particular to a comprehensive quantitative early warning method for rockburst precursors based on multiple microseismic parameters. Background technique [0002] Rockburst phenomenon is a very challenging topic in the field of rock mechanics and engineering, and its precursory warning is still a big problem. Due to the complex mechanism of the rockburst phenomenon, there are many factors affecting the rockburst phenomenon, and the rockburst phenomenon has significant nonlinearity. Therefore, the precursory warning of the rockburst has not been effectively answered. [0003] Multi-channel all-digital microseismic monitoring technology and system is currently the most advanced monitoring technology and system for rock engineering stability monitoring in the world. The multi-channel microseismic monitoring system can obtain multiple microseismic parameters about microseismic even...

Claims

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Application Information

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IPC IPC(8): G01V1/00
Inventor 黄玉仁李庶林林峰胡静云王剑明范德全陈济熙
Owner 中铁二十四局集团福建铁路建设有限公司
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