1. Associate Professor, Center for Rock Instability and Seismicity Research, Northeastern Univ., Shenyang 110004, Liaoning Province, China; formerly, Associate Professor, Center for Material Failure Modeling Research, Dalian Univ., #10 Xuefu St., Dalian 116622, China (corresponding author).
2. Professor, Center for Rock Instability and Seismicity Research, Dalian Univ. of Technology, Dalian 116024, Liaoning Province, China.
3. Professor, Rock Mechanics Laboratory, Ecole Polytechnique Fédérale de Lausanne, ENAC-ICARE-LMR, Station 18, CH-1015 Lausanne, Switzerland.