Study on relationship between rock burst and microquake influence factor

doi:10.16265/j.cnki.issn1003-3033.2017.02.020

Abstract

Abstract: The occurrence of mine earthquake is controlled by many factors. In order to study the effect of mine earthquake distribution on rock burst under different conditions of incentives, the travel time formula and the critical distance formula were got by means of inversion calculation,and rock burst mechanism and distribution were analyzed from aspects of key stratum movement and the stability of the mining speed on the basis of data collected during seismic detection. Research results show that, the occurrence of mine earthquake can be divided into a number of activity periods,that the microseismic signals first gather in the main roof, then spread to the key strata, finally appeare in the main roof, that changes in mining speed can cause sudden roof caving,and speeding up mining makes a high stress concentration area appear in front of working face, and the distance between the two becomes shorter and shorter as the working face advances,and that a sudden increase in daily footage has s singnificant effect on both the earthquake magnitude and the frequency.

Key words: back calculation, rockburst, microseism, motion period, key strata, mining speed

CLC Number:

X915.5

YIN Wanlei , PAN Yishan , LI Zhonghua , YAN Haipeng , LI Guozhen. Study on relationship between rock burst and microquake influence factor[J]. China Safety Science Journal, 2017, 27(2): 109-114.

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