Advances in mineral resources, geotechnology and geological exploration : proceedings of the 7th International Conference on Mineral Resources, Geotechnology and Geological Exploration (MRGGE 2022), Xining, China, 18-20 March, 2022 /: proceedings of the 7th International Conference on Mineral Resources, Geotechnology and Geological Exploration (MRGGE 2022), Xining, China, 18-20 March, 2022. (2022)