1. Binzhou University, Binzhou 256600, China
2. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
3. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
4. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
5. Chengjiao Coal Mine of Yongmei Company of Henan Energy and Chemical Industry Group, Yong Cheng 476600, China
6. Institute of Mining Research, Inner Mongolia University of Science and Technology, Baotou 014010, China