1. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
2. Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization for Coal by Provincial and Ministerial Co-Construction, Jiaozuo 454003, China
3. State Key Laboratory Cultivation Base for Gas Geology and Gas Control in Henan Polytechnic University, Jiaozuo 454003, China
4. Department of System Safety Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka-machi, Nagaoka-shi, Niigata 940-2188, Japan