1. Key Laboratory of Coal Processing & Efficient Utilization, Ministry of Education, School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China
2. Advanced Analysis & Computation Center, China University of Mining & Technology, Xuzhou, Jiangsu, 221116, China
3. Jiangsu Design and Research Institute of Geology for Mineral Resources, Xuzhou, Jiangsu, 221006, China