1. State Key Laboratory for Geomechanics and Deep Underground Engineering; School of Mechanics and Civil Engineering; China University of Mining and Technology; Xuzhou 221116 China
2. ARC Centre of Excellence for Geotechnical Science and Engineering; The University of Newcastle; Callaghan NSW 2308 Australia
3. Geomechanics and Railway Engineering Research Centre, Faculty of Engineering; University of Wollongong; Wollongong NSW 2522 Australia
4. Research Center of Coastal and Urban Geotechnical Engineering; Zhejiang University; Hangzhou 310058 China