1. Key Lab of Mine Disaster Prevention and Control, College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
2. School of Energy and Safety Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
3. School of Mining and Mechanical Engineering, Liupanshui Normal University, Liupanshui, Guizhou 553004, China