1. State Key Laboratory of Coal Mine Disaster Dynamics and Control; Chongqing University; Chongqing China
2. College of Resources and Environmental Science; Chongqing University; Chongqing China
3. Key Lab of Drilling and Exploitation Technology in Complex Conditions; Ministry of Land and Resources; Changchun China
4. China Coal Technology Engineering Group Chongqing Research Institute; Chongqing China