1. College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, China
2. College of Safety Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
3. Department of Mining Engineering, Missouri University of Science and Technology, Rolla, MO, USA
4. WA School of Mines, Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, Western Australia, Australia