1. Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo, China
2. The Central Plains Economic Zone (shale) of Coal Seam Gas Collaborative Innovation Center, Jiaozuo, Henan, China
3. Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Jiaozuo, China
4. Guhanshan Coal Mine, Henan Coking Coal Energy Co Ltd, Jiaozuo, China