1. Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221116, China
2. School of Public Policy and Management, China University of Mining and Technology, Xuzhou 221008, China
3. Jiangsu Research Center of Land Resources, Nanjing 210017, China
4. Key Laboratory of Land Consolidation, Ministry of Natural Resources, Beijing 100035, China