1. Unconventional Gas Research Institute, Henan Polytechnic University, Jiaozuo 454000, China
2. Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China
3. Sihe Mine of Jinneng Holding Coal Industry Group, Jincheng 048000, China
4. School of Energy Resources, China University of Geosciences, Wuhan 430074, China
5. State Key Laboratory of Coal and Coalbed Methane Simultaneous Extraction, Jincheng 048012, China