1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines (Anhui University of Science and Technology), Huainan, Anhui 232001, China
2. School of Mining Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
3. China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China
4. Anhui Academy of Coal Science, Hefei, Anhui 230001, China