1. School of Safety Engineering China University of Mining and Technology Xuzhou Jiangsu China
2. Key Laboratory of Coal Methane and Fire Control, Ministry of Education China University of Mining and Technology Xuzhou Jiangsu China
3. Research Center for Coal Mine Gas Control China University of Mining and Technology Xuzhou Jiangsu China
4. State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization China Pingmei Shenma Energy & Chemical Industry Group Co., Ltd Pingdingshan Henan China