1. Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
2. Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4001, Australia
3. WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin, Bentley, WA 6102, Australia
4. School of Minerals and Energy Resources Engineering, UNSW, Sydney, NSW 2052, Australia