1. School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, New South Wales, Australia
2. School of Safety Engineering, China University of Mining and Technology, Xuzhou, China
3. School of Mechanical, Materials, Mechatronics and Biomedical Engineering, University of Wollongong, Wollongong, New South Wales, Australia
4. School of Civil Engineering, The University of Queensland, Brisbane, Queensland, Australia