1. Research Assistant, School of Resources and Safety Engineering, Central South Univ., Changsha 410083, China; Dept. of Ocean Science and Engineering, Southern Univ. of Science and Technology, Shenzhen 518055, China.
2. Professor, School of Resources and Safety Engineering, Central South Univ., Changsha 410083, China (corresponding author).
3. Assistant Professor, Dept. of Ocean Science and Engineering, Southern Univ. of Science and Technology, Shenzhen 518055, China.
4. Associate Professor, School of Resources and Safety Engineering, Central South Univ., Changsha 410083, China.