1. School of Civil, Mining and Environmental Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW, Australia
2. Department of Civil Engineering, Faculty of Engineering, University of Central Punjab, Lahore, Pakistan
3. School of Civil Engineeing, University of Leeds, Leeds, UK
4. Formerly Centre for Geomechanics and Railway Engineering, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW, Australia