Investigation of the stress imaging in rock samples using numerical modeling and laboratory tomography

摘要

The ability to understand stress redistribution within a mine will allow for greater extraction efficiency with reduced safety concerns. Stress redistribution has been examined at the laboratory scale using ultrasonic tomography and numerical modeling using Particle Flow Code in 3 Dimensions (PFC~(3D)) (Itasca, 2003). In the first part of the study an equation is developed to convert the macro-properties of the rock to the micro-properties of the particles in the model. In the second half of the study, an attempt is made to investigate the stress distribution in rock samples in three-dimensions, as they are uniaxially loaded to failure using both numerical modeling and laboratory tomograms. This study will help to predict failure in laboratory samples and when applied to mines this will help to prevent rockbursts and roof falls.