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Rock Mechanics and Rock Engineering

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01-07-2016 | Original Paper

Rock Burst Monitoring by Integrated Microseismic and Electromagnetic Radiation Methods

Authors: Xuelong Li, Enyuan Wang, Zhonghui Li, Zhentang Liu, Dazhao Song, Liming Qiu

Published in: Rock Mechanics and Rock Engineering | Issue 11/2016

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Abstract

For this study, microseismic (MS) and electromagnetic radiation (EMR) monitoring systems were installed in a coal mine to monitor rock bursts. The MS system monitors coal or rock mass ruptures in the whole mine, whereas the EMR equipment monitors the coal or rock stress in a small area. By analysing the MS energy, number of MS events, and EMR intensity with respect to rock bursts, it has been shown that the energy and number of MS events present a “quiet period” 1–3 days before the rock burst. The data also show that the EMR intensity reaches a peak before the rock burst and this EMR intensity peak generally corresponds to the MS “quiet period”. There is a positive correlation between stress and EMR intensity. Buckling failure of coal or rock depends on the rheological properties and occurs after the peak stress in the high-stress concentration areas in deep mines. The MS “quiet period” before the rock burst is caused by the heterogeneity of the coal and rock structures, the transfer of high stress into internal areas, locked patches, and self-organized criticality near the stress peak. This study increases our understanding of coal and rock instability in deep mines. Combining MS and EMR to monitor rock burst could improve prediction accuracy.

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Title: Rock Burst Monitoring by Integrated Microseismic and Electromagnetic Radiation Methods
Authors: Xuelong Li
Enyuan Wang
Zhonghui Li
Zhentang Liu
Dazhao Song
Liming Qiu
Publication date: 01-07-2016
Publisher: Springer Vienna
Published in: Rock Mechanics and Rock Engineering / Issue 11/2016
Print ISSN: 0723-2632
Electronic ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-016-1037-6

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