1. Professor, State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong Univ. of Science and Technology, Qingdao 266590, China; College of Safety and Environmental Engineering, Shandong Univ. of Science and Technology, Qingdao 266590, China (corresponding author).
2. State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong Univ. of Science and Technology, Qingdao 266590, China; College of Safety and Environmental Engineering, Shandong Univ. of Science and Technology, Qingdao 266590, China.
3. Professor, State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong Univ. of Science and Technology, Qingdao 266590, China; College of Safety and Environmental Engineering, Shandong Univ. of Science and Technology, Qingdao 266590, China.