1. School of Mining Engneering, Anhui University of Science and Technology, Huai Nan, China
2. State Key Laboratory of Mining-Induced Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huai Nan, China
3. Yankuang Energy Group Company Limited Baodian Coal Mine, Zou Cheng, China
4. Yankuang Energy Group Company Limited Jining No. 2 Coal Mine, Ji Ning, China