USE OF PARTICLE CLUMPING IN SIMULATION OF ROCK DEFORM ATION AND FRACTURING IN UNIAXIAL COMPRESSIVE BOUNDARY CONDITION USING PARTICLE FLOW CODE 2D

摘要

@@This paper deals with a particle clumping technique which combines the neighboring particle together to mimic a single irregular-shape rock grain. The clumped particle assembly was tested in uniaxial compressive boundary condition. Analysis of stress vs. strain curves and orientations of cracks from model simulations on the clumped particle assembly and the conventional particle assembly indicates that the particle clumping better mimics the deformation, strength, and fracturing characteristics of rocks. However, further investigations and improvements are still required for the clumped particle assembly to have wider uses in practical applications, irrespective of stress path.