1. School of Earth Science and Engineering, Hebei University of Engineering, Handan, People’s Republic of China
2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology (Beijing), Beijing, People’s Republic of China
3. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, People’s Republic of China
4. Key Laboratory of Mine Disaster Prevention and Control, North China Institute of Science and Technology, Beijing, People’s Republic of China