[1] Jiangsu Key Laboratory of Resources and Environmental Informatics Engineering, Xuzhou 221116, China
[2] Institute of Land Resources, China University of Mining and Technology, Xuzhou 221008, China
[3] Jinfeng Coal Mining Branch Co., Shenhua Group Co., Ordos 017209, China
[4] Global Institute for Energy and Environmental Systems, University of North Carolina, Charlotte NC28223, United States