1. College of Safety and environmental engineering, Shandong University of Science and Technology, Qingdao, Shandong, China
2. State Key Laboratory of Mining Lab Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong, China
3. College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China