Determination of mining-induced stresses using diametral rock core deformations

Abstract Knowledge of ground stresses is crucial for control activities such as the design underground openings, selection support systems, and analysis stability. However, it a known fact that far field experience changes in orientation magnitude due to presence geological structures excavations created by mining activities. As result, in-situ around drifts, ramps, stopes mines are quite different from or pre-mining stresses. The purpose this research develop simple practical methodology determining Stress relief occurs once rock core drilled off. Such function surrounding stress field. This study uses exploration cores off orebody definition mine. method measures analyzes diametral deformations laboratory. Two case studies operating presented demonstration. In these studies, measured with customized test apparatus samples were prepared tested Young’s modulus Poisson’s ratio. differential stress, namely difference between local principal plane perpendicular axis calculated. It shown useful brittle shear ratio mass, which primary interest studies.