1. College of Mining, Guizhou University, Guiyang, 550025, PR China
2. Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources, Guiyang, 550025, PR China
3. National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guizhou University, Guiyang, 550025, PR China