1. Professor, State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan Univ., Wuhan 430072, China; and Professor, Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Wuhan Univ., Ministry of Education, Wuhan 430072, China (corresponding author).
2. Ph.D. Graduate Student, State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan Univ., Wuhan 430072, China.
3. Professor, State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan Univ., Wuhan 430072, China.
4. Professor, Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering,Wuhan Univ., Ministry of Education, Wuhan 430072, China.