[1] State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing,400044, China
[2] State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing,400044, China
[3] College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao,266590, China