1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, China
2. Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo, Henan, China
3. Zhaozhuang Coal Industry, Jinneng Holding Coal Industry Group, Jincheng, Shanxi, China
4. School of Resources and Environment, Henan Polytechnic University, Jiaozuo, Henan, China