1. Professor, State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong Univ., Chongqing 400074, China; Key Lab Western Mineral Resources and Geological Engineering, Chang'an Univ., Xian 710054, Shaanxi, China.
2. Ph.D. Student, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China.
3. Professor, Key Lab Western Mineral Resources and Geological Engineering, Chang’an Univ., Xian 710054, Shaanxi, China (corresponding author).