1. School of Safety Science and Engineering, Changzhou University, Changzhou, Jiangsu, China
2. Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou, China
3. School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
4. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou, China