Estimation of Shear Strength Parameters Considering Joint Roughness: A Stability Case Analysis of Bedding Rock Slopes in an Open-Pit Mine

This study aims to fully explore the influence of rock joint roughness in slope stability analysis an open mine. Therefore, based on least squares parameter estimation method, a generalized shear strength coupling roughness, which is used evaluate design, was established by matching formula reflecting relationship between coefficient and parameter. Firstly, verify calibrate model, physical direct tests were conducted serrated joints, effect analyzed qualitatively. The results show that increase tooth height increases internal friction angle but decreases cohesion. test numerical model PFC-2D compared with curve, effectively verifying its correctness. cohesion c φ JRC further quantified, new then fitted characterize parameters. method applied design optimization pit mine slope. parameters are input GeoSMA-3D, search for key block bedding open-pit mine, optimize