State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China;
School of Civil and Environmental Engineering University of Chinese Academy of Sciences Beijing 100049 China;
School of Resources and Environmental Sciences Chongqing University Chongqing 400044 China;
Mackay School of Earth Sciences and Engineering University of Nevada Reno NV USA;