基于地音监测的近直立煤层冲击地压前兆特征研究

doi:10.11799/ce202004010

Abstract

Abstract: In order to solve the problem about rockburst monitoring and early warning of an approximately vertical seam, the evolution law of the energy and frequency of acoustic emission events before and after rockburst was studied and precursor information of rockburst was recognized based on previous rockburst events of Wu Dong coal mine B3+6 working face in +450 level. The results show that before the occurrence of rockburst, the activity of acoustic emission events experienced a transition from a calm period to a strong period. The phenomenon of sudden changes in acoustic emission activity from calm to intense abruptness can be used as the precursor information of rockbrust.

CLC Number:

TD324

References 15

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Study on the evolution law of acoustic emission prior to rockburst in the mining of an approximately vertical coal seam

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