1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
2. Shandong Provincial Lunan Geology and Exploration Institute (Shandong Provincial Bureau of Geology and Mineral Resources No. 2 Geological Brigade), Jining, China
3. Geophysical and Geochemical Exploration Institute of Ningxia Hui Autonomous Region, Yinchuan, China
4. Gucheng Coal Mine, Lu’an Chemical Group Company Ltd, Changzhi, China
5. School of Foreign Studies, China University of Mining and Technology, Xuzhou, China