Arup Geotechnics;
Solihull;
UK;
Department of Civil & Environmental Engineering;
Imperial College London;
London;
UK;
Department of Geotechnical Engineering;
School of Civil Engineering;
National Technical University Athens;
Athens;
Greece;
Discrete; element; method; (DEM); Heterogeneous; rocks; Strength; and; stiffness; Parallel; bond; model;