Computer Estimation of JRC Index Using Function Moments

The paper deals with a shape of geological discontinuities. This significantly affects the stability rock massifs. joint roughness coefficient (JRC) is one main indicators but methods its estimation are based on empirical analysis fracture curves in present. We propose new mathematically correct theory automatic JRC. It shows that determination JRC should be not only subjective experience, objective characteristics used as well. moment method possibilities. principal moments surface and elongation so called equimomental ellipse can determined possible surface. introduces software which able to reconstruct 3D profile scanned assign index automatically.