1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of the Ministry of Education, Wuhan University, Wuhan 430072, China
3. Department of Earth Sciences, Uppsala University, Villavägen 16, SE-75236 Uppsala, Sweden
4. Department of Civil and Environmental Engineering, Center for Experimental Study of Subsurface Environmental Processes, Colorado School of Mines, Golden, Colorado 80401, United States