Investigation of the influence mechanism of rock damage on rock fragmentation and cutting performance by the discrete element method.

ABSTRACT: Rock damage is one of the key factors in the design and model choice of mining machinery. In this paper, the influence of rock damage on rock fragmentation and cutting performance was studied using PFC^2D. In PFC^2D software, it is feasible to get rock models with different damage factors by reducing the effective modulus, tensile and shear strength of bond by using the proportional factors. A linear relationship was obtained between the proportion factor and damage factor. Furthermore, numerical simulations of rock cutting with different damage factors were carried out. The results show that with the increase of damage factor, the rock cutting failure mode changes from tensile failure to brittle failure, accompanied by the propagation of macro cracks, the formation of

SUBMITTER: Liu SF 

PROVIDER: S-EPMC6549963 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature