Experimental and Numerical Simulation Study on Prediction of Kaiser Effect Point of Rock Acoustic Emission

摘要：

Acoustic emission means the phenomenon of sending out elastic transient waves resulting from energy quick releasing out of local of material. It is inevitable that the compression deformation of rock accompanied by acoustic emission, and the rational determination of Kaiser Effect point of rock acoustic emission is critical for exactly measuring in-situ stress using technique of acoustic emission. In this paper, servo system MTS815.03 was used to carrying out acoustic emission experiment under uniaxial compression. Through experiment results, Kaiser Effect point only exists in the elastic stage under the uniaxial compression loading, the maximum stress that it remembered is the 48％ of ultimate stress of rock, and acoustic emission well reflects the process of compression deformation and damage evolvement of rock. Adopting rock sample and loading path which was the same as experiment, numerical calculation was carried out, and Kaiser Effect point exists in the elastic stage of rock, and maximum stress that it remembered is the 48.7％ of ultimate stress of rock. So the Kaiser Effect point determined by experiment agreed with that determined by numerical calculation.

关键词： acoustic emission Kaiser Effect point rock rupture numerical simulation

作者: CHU Jun YANG Yongjie LI Yumei GAO Lei

作者单位: Key Laboratory of Disaster Prevention and Control,Shandong University of Science and Technology,Qing Jinan Design Institute LTD.of Coal Industry,Jinan 250031,Shandong,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1834-1837

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）