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