TY - CPAPER T1 - Three-dimensional random Voronoi models for simulation of brittle rock damage around underground excavations in laminated ground T2 - Deep Mining 2017: Eighth International Conference on Deep and High Stress Mining AU - Ghazvinian, E AU - Kalenchuk, KS AU - Diederichs, MS ED - Wesseloo, J A2 - Wesseloo, J DA - 2017/03/28 PY - 2017 PB - Australian Centre for Geomechanics PP - Perth CY - Perth C1 - Perth SP - 277 EP - 288 AB - Three-dimensional Voronoi tessellations are utilised to demonstrate the simulation of brittle damage around underground mine excavations. Synthetic rock mass models are developed based on calibrated simulations that have been up-scaled to represent excavation-scale rock mass conditions. Rock mass anisotropy plays a significant role in the stability of underground excavations, and so anisotropic conditions are replicated by implementing the up-scaled laminated grain-based model composed of elongated three-dimensional Voronoi blocks. Models explore the influence of the orientation of anisotropic fabric with respect to the in situ stress tensor to demonstrate the Voronoi-based discrete element method modelling technique for simulation of brittle failure. The numerical results verified the success of this approach in capturing the correct failure mode controlled by fabric-guided fracturing in the walls of deep undergrounds openings. KW - numerical modelling KW - 3D Voronoi tessellation KW - excavation stability UR - https://papers.acg.uwa.edu.au/p/1704_19_Ghazvinian/ ER - DO - 10.36487/ACG_rep/1704_19_Ghazvinian