抄録
In this study, numerical simulations on rock breaking by penetration of disc cutter were carried out by using Distinct Elements Method (DEM). A rock sample consisted of 293706 spherical elements of 2mm diameter. Three kinds of disc cutter were used in this simulation. They were wedge type, round type and flat type. These disc cutters were modeled and were penetrated into the rock. In this simulation, the forces acting on the disc cutter were calculated and they were compared with the results obtained in the previous experiment. The calculated results were well agreed with the experimental ones. Furthermore, the fractures generated in the rock were simulated for three types of disc cutter with different shape. In the case of round and flat type disc cutter, the dominant fracture was observed. It was generated just under the disc cutter and was connected with the fracture generated from the neighbor disc cutter. That is, adjacent breaking was simulated.
