1. The Collaborative Innovation Center of Coal Safety Production of Henan, Henan Polytechnic University, Jiaozuo, China
2. Key Laboratory of Coal Methane and Fire Control, China University of Mining and Technology, Ministry of Education, Xuzhou, China
3. Henan Provincial Key Lab of Gas Geology and Control-Cultivation Base of Provincial and Ministry Joint State Key, Henan Polytechnic University, Jiaozuo, China
4. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, China