1. School of Mines, China University of Mining and Technology, Xuzhou 221116, China
2. State Key Laboratory of Coal Resources and Safe Mining (CUMT), Xuzhou 221116, China
3. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
4. Luwa Coal Mine, Shandong Lutai Holding Group, Jining 272350, China