1. Professor, College of Emergency Management and Safety Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, PR China.
2. College of Emergency Management and Safety Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, PR China; Institute of Mine Safety Technology, China Academy of Safety Science and Technology, Beijing 100020, PR China (corresponding author).
3. Professor, Institute of Mine Safety Technology, China Academy of Safety Science and Technology, Beijing 100020, PR China.
4. Engineer, Dept. of Emergency Safety Management, Zhejiang Academy of Emergency Management Science, Hangzhou 310012, PR China.
5. Teacher, College of Quality and Safety Engineering, China Jiliang Univ., Hangzhou 310018, PR China.