1. Graduate Research Assistant, Rock Mass Modeling and Computational Rock Mechanics Laboratories, Univ. of Arizona, Tucson, AZ 85721; State Key Laboratory for Geomechanics and Deep Underground Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, China.
2. Professor and Director, Rock Mass Modeling and Computational Rock Mechanics Laboratories, Univ. of Arizona, Tucson, AZ 85721 (corresponding author).
3. Lecturer, State Key Laboratory for Geomechanics and Deep Underground Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, China.
4. Academician, Chinese Academy of Sciences, and Professor and Director, State Key Laboratory for Geomechanics and Deep Underground Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, China.