Abstract: Abstract： The effects of cutting parameters and rock properties on cutting forces were studied through 3D simulation of rock cutting in the LSDYNA with the MohrCoulomb model as rock material model and the SPH method. A formula to estimate cutting forces was created based on the relationships between cutting forces and cutting parameters, as well as rock properties drawn from the simulation results. The calculating results of the proposed formula were compared with the experiments. The simulation results show that cutting depth, rake angle, cutting width, cohesion and internal friction angle of rock have significant effects on cutting forces and that the variation of cutting speed have a small effect when the speed is slow. The interaction between the cutter tooth and rock particles beside it was taken into consideration in the 3D simulation of rock cutting. It made the simulation agree better with the experiments than the 2D cutting model. The formula created in this paper can estimate the tangential cutting forces of the simulation with less errors and its calculating results agree well with the experimental results. The SPH method is proved to be a reliable method in rock cutting with cutter tooth.

Key words: smoothed particle hydrodynamics(SPH) method, rock cutting, numerical simulation, cutting force, cutting parameter