1. School of Geophysics and Information Technology; China University of Geosciences (Beijing), State Key Laboratory of Geological Processes and Mineral Resources, MWMC Group; Beijing 100083 China
2. College of Geoscience and Surveying Engineering; China University of Mining & Technology (Beijing); Beijing 100083 China
3. Henan Polytechnic University; Jiaozuo Henan 454000 China