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. Anhui University of Science and Technology, Huainan, Anhui 232001, China
3. State Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China
4. Gas Research Branch, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China
5. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China
6. Pan’er Coal Mine, Huainan Coal Power Co., Ltd, Huainan 232000, China