Estimation of REV size and Determination of geo-mechanical properties of the rock mass in Sechahoon Anomaly XII Mine

REV size study was carried out for data of Sechahoon Anomaly XII mine by using discrete fracture network and distinct element method in order to characterize mechanical and behavioral properties of a highly jointed rock mass. By studying on scale dependency of mechanical properties of rock mass, REV size was determined. On the other hand, for continuum modeling of rock mass because of inherent uncertainty in geometrical and mechanical characteristics, 39 sample model were generated stochastically based on geometry variation of joints. Uniaxial and triaxial compressive tests were performed and finally distributions of UCS, deformability modulus, cohesion and friction angle of rock mass were obtained. These can be used for reliability and probability investigation of rock mass.