1. School of Resources and Safety Engineering, Chongqing University, Chongqing, China
2. State Key Laboratory of Coal Mine Disaster and Control, Chongqing University, Chongqing, China
3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, China
4. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, China