1. School of Mines, China University of Mining & Technology, Xuzhou 221116, China
2. Key Laboratory of Xinjiang Coal Resources Green Mining, Xinjiang Key Laboratory of Coal-Bearing Resources Exploration and Exploitation, Xinjiang Engineering Research Center of Green Intelligent Coal Mining, Xinjiang Institute of Engineering, Urumqi 830023, China
3. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China