1. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, China;
2. School of Geology Engineering and Geomatics, Chang’an University, Xi’an, China;
3. Institute of Geo-Hazards Mitigation, Chang’an University, Xi’an, China;
4. Key Laboratory of Western Mineral Resources and Geological Engineering Ministry of Education, Chang’an University, Xi’an, China;
5. Shandong Geological and Mineral Resources Engineering Investigation Institute, Ji’nan, China