1. State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining & Technology, Xuzhou, 221116, China
2. College of Mining Engineering & Geology, Xinjiang Institute of Engineering, Urumqi, 830000, China
3. School of Economics and Management, China University of Mining & Technology, Xuzhou, 221116, China
4. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining &Technology, Xuzhou, 221116, China