1. Department of Land Management Zhejiang University Hangzhou PR China
2. Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology Beijing PR China
3. State Key Laboratory of Water Resources Protection and Utilization of Coal Mining Beijing PR China
4. Shanxi Key Laboratory of Resources,Environment and Disaster Monitoring Shanxi Coal Geology Geophysical Surveying Exploration Institute Jinzhong PR China