1. Lecturer, Centre for Geomechanics and Railway Engineering, Faculty of Engineering and Information Sciences, ARC Centre of Excellence for Geotechnical Science and Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia.
2. Research Director, Professor of Civil Engineering, Centre for Geomechanics and Railway Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia; ARC Centre for Excellence for Geotechnical Science and Engineering, Australia (corresponding author).
3. Associate Professor, Centre for Geomechanics and Railway Engineering, Faculty of Engineering and Information Sciences, ARC Centre of Excellence for Geotechnical Science and Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia.
4. Ph.D. Candidate, Centre for Geomechanics and Railway Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia; ARC Centre for Excellence for Geotechnical Science and Engineering, Australia Faculty of Engineering, Australia.