1. Ph.D. Student, State Key Laboratory of Mining Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao 266590, China.
2. Lecturer, State Key Laboratory of Mining Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao 266590, China (corresponding author).
3. Professor, State Key Laboratory of Mining Disaster Prevention and Control, Shandong Univ. of Science and Technology, Qingdao 266590, China.
4. Lecturer, Dept. of Resources and Civil Engineering, Shandong Univ. of Science and Technology, Tai’an 271000, China.
5. Ph.D. Student, Geotechnical and Structural Engineering Research Center, Shandong Univ., Jinan 250061, China.