1. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
2. Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA 16802, USA
3. Institute of Geotechnics, TU Bergakademie Freiberg, 09599 Freiberg, Germany
4. State Key Laboratory of Marine Resources Utilization in South China Sea, Hainan University, Haikou 570228, China