1. School of Safety & Science Engineering, Henan Polytechnic University, Jiaozuo, China
2. Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Henan Polytechnic University, Jiaozuo, China
3. Henan Key Laboratory of Prevention and Cure of Mine Methane & Fires, Henan Polytechnic University, Henan, Jiaozuo, China