Akademik Veri Yönetim Sistemi
European Rock Mechanics Symposium (EUROCK 2010), Lausanne, İsviçre, 15 - 18 Haziran 2010, ss.413-416
Investigation of indentation by the indenter/cutter of a mechanical excavation machine is important to explain the mechanics of rock cutting, and to improve tunnelling performance in mining and civil engineering applications. In this paper, an attempt is made to investigate indenter/rock interaction under various indenter profiles to understand the stress distribution and crack propagation in rock, as a function of indenter profile. The indenter/cutter profile is a primary parameter for rock cutting research. Numerical modelling is carried out using FRANC2D to determine the resulting stress distribution and discrete crack propagation, and to allow a comparison of the stress intensity factors (K(1)) in front of the crack tips. In addition, rock chipping induced by two neighbouring constant cross-section (CCS) disc cutters is modelled for different cutter spacings. The numerical models of cutter spacing are validated by comparison with field data supplied from an ongoing tunnelling project.