1. Doctoral Student, School of Resources and Safety Engineering, Central South Univ., Changsha, Hunan Province 410083, China.
2. Associate Professor, School of Resources and Safety Engineering, Central South Univ., Changsha, Hunan Province 410083, China (corresponding author).
3. Professor, School of Resources and Safety Engineering, Central South Univ., Changsha, Hunan Province 410083, China.
4. Professor, College of Mining and Safety Engineering, Shandong Univ. of Science and Technology, Qingdao, Shandong Province 266590, China.
5. Doctoral Student, School of Resources and Safety Engineering, Central South Univ., Changsha, Hunan 410083, China.