1. School of Architecture and Civil Engineering, Liaocheng University, Liaocheng, Shandong, China
2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, School of Resources and Safety Engineering, Chongqing University, Chongqing, China
3. School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing, China
4. School of Safety Engineering, China University of Labor Relations, Beijing, China