1. Key Laboratory of Coal Methane and Fire Control, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
2. State Key Laboratory of Coal Resources and Safety Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
3. School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
4. State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, Xuzhou, Jiangsu 221116, China