Discrete element modelling of rock cutting

This paper presents numerical modelling of rock cutting processes. The model consists of a tool-rock system. 3D geometry is considered in the model. The rock is modelled using the discrete element method, which is suitable to study problems of multiple material fracturing like that of rock cutting. The paper presents brief overview of the theoretical formulation and calibration of the discrete element model by simulation of the unconfined compressive strength (UCS) and indirect tension (Brazilian) tests. Numerical examples illustrate the paper. Rock cutting processes typical for underground excavation using both roadheader and TBM cutting tools are simulated. Numerical results are compared with the available experimental data.

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