1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
2. State Key Laboratory of Mining Disaster Prevention and Control, Ministry of Education, Qingdao 266590, China
3. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
4. China Construction First Group Construction & Development Co., Ltd., Beijing 100102, China