1. School of Public Policy and Management, China University of Mining and Technology, Xuzhou, China
2. Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou, China
3. School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
4. Department Umwelt- und Energieverfahrenstechnik, Montanuniversitaet Leoben, Styria, Austria
5. China Coal Society, Beijing, China
6. School of Mines, China University of Mining and Technology, Xuzhou, China