1. College of Mining, Liaoning Technical University, Fuxin 123000, China
2. State and Local Joint Engineering Laboratory for Gas Drainage & Ground Control of Deep Mines, Henan Polytechnic University, Jiaozuo 454003, China
3. Energy Business Department, Shanxi Lu’an Chemical Group, Changzhi 046200, China
4. College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, China