期刊
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
卷 106, 期 -, 页码 342-349出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2018.04.031
关键词
Rockburst; Overall instability; Island longwall panel; Risk assessment; Stress monitoring; Microseismic monitoring; Numerical modeling
资金
- China Postdoctoral Science Foundation [2017M620624]
- Fundamental Research Funds for the Central Universities [FRF-TP-17-076A1]
- National Natural Science Foundation of China [51674014, 51634001]
- Beijing Municipal Science and Technology Project [Z161100002716023]
An increasing number of mines in China are being subjected to overall-instability-induced (OII) rockbursts in extracting deep remnant island longwall panels, causing severe damage at far larger scale and intensity compared with common local rockbursts. Using the island longwall panel LW1305 at Zhaolou Coal Mine as a case example, this paper investigates the mechanism of the newly defined OII rockburst by means of stress and microseismic monitoring, and then proposes a straightforward risk assessment method for OII rockbursts based on the actual bearing index in an attempt to provide guidelines for making engineering judgement. The proposed risk assessment method was successfully applied to LW1305, and the assessment result is supported by the occurrence of an OII rockburst in LW1305, and further verified by numerical modeling and microseismic monitoring.
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