Numerical simulation of rock cutting using the discrete element method

In this study, an attempt was made to model rock cutting tests. For this purpose, a computer program named Particle Flow Code in 3 Dimensions (PFC3D) was used. In order to numerically predict tool forces from cutting tests in PFC3D, graded particle assemblies were created, and the micro-properties were calibrated by modeling the uniaxial compressive strength test. Following the model creation procedure, the conical (point attack) pick was positioned and advanced with a constant velocity. The tool forces acting on the pick were recorded during the simulations. Moreover, the peak cutting forces were calculated by utilizing the theoretical equations proposed by researchers and the results of experimental studies were given as well. Consequently, the mean peak cutting forces, which were obtained from numerical, experimental and theoretical models, were compared. The relationships between these models were investigated and supported with the regression analysis. It was pointed out that there is a strong correlation between the modeling, experimental and theoretical studies. (C) 2010 Elsevier Ltd. All rights reserved.