Research on Prediction of Instability Failure for Gassy Coal Sample in Different Confining Pressure Based on Microseism

摘要：

According to the rock failure damage theories and the gas-solid coupling method, used RFPA2D—GasFlow soft code to study the characteristics of microseism in time and space for gassy coal sample in different confining pressure. It is shown that there is some microseism precursory before main shock. Basing on the characteristics of microseism precursory events amount in time can be warned in advance, and basing on the characteristics of microseism precursory events produced by tension stress in space, there is can divide potential failure danger zone. It is shown that the divided results for potential failure danger zone are exactly, and with the increment of confining pressure, the accuracy of divided results on potential failure danger zone become higher. It is found that the potential failure danger zone consistent with crack initiatory zone by contrasted potential failure danger zone to crack development process, and with the increment of confining pressure, the consistency become higher.

关键词： gas-solid coupling confining pressure heterogeneity main shock microseism precursory numerical tests

作者: DUAN Dong TANG Chun-an

作者单位: College of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian,Liaoning 116024,

会议类型: 国际会议

会议名称: The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)

会议地点: 北京

会议语种:英文

页码: 573-578

在线出版日期: 2011-10-27（万方平台首次上网日期，不代表论文的发表时间）