1. School of Civil Engineering, Guilin University of Technology, Guilin 541004, China
2. College of Earth Sciences, Guilin University of Technology, Guilin 541004, China
3. Guangxi Hanximing Technology Co., Ltd., Guilin 541004, China
4. China Nonferrous Metals (Guilin) Geology and Mining Co., Ltd., Guilin 541004, China