[1] School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an,710054, China
[2] Key Laboratory of Western Mines and Hazard Prevention, Ministry of Education of China, Xi'an University of Science and Technology, Xi'an,710054, China
[3] The Western Coal Mine Safety Engineering Research Center of The Ministry of Education, Xi'an,710054, China
[4] The Safety Supervision Bureau of Shigatse, Shigatse,857000, China