1. School of Resources and Safety Engineering and the State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
2. State Key Laboratory of Coal Mine Disaster Dynamics and Control and the School of Electrical Engineering, Chongqing University, Chongqing, China
3. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
4. School of Electrical Engineering, Chongqing University, Chongqing, China