1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
2. Exploration Research Institute, Anhui Provincial Bureau of Coal Geology, Hefei, Anhui, China
3. Tongling Yangershan Mining Co., Ltd., Anhui Niu Shan Mining Co., Ltd., Tongling, Anhui, China
4. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, China
5. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui, China
6. Sinosteel Maanshan General Institute of Mining Research Co., LTD, Maanshan, Anhui, China