Numerical simulation of the open pit stability based on probabilistic approach

Purpose. To identify development regularities related to a stress-strain state and stability of the open pit walls while mining steeply inclined iron-ore body at various stages considering deterministic stochastic components rock mass structural heterogeneity. Methodology. Numerical 3D simulation state; application strength reduction procedure determine safety factor, taking into account heterogeneity based on model. Findings. The distribution maximum shear deformations displacements within mass, making up wall, has been obtained. Potential slide surfaces factors have determined ore mining. effect structure wall estimated. A comparison calculations 2D models carried out. correction coefficient obtained, which allows using model for multivariate calculations. relationship factor versus overall slope angle developed. Originality. It proved that retain their (the (SF) is not less than 1.27) with transverse panels from top bottom each newly cut layer, despite increasing depth shown modeling real geological three-dimensional area decrease in (by 7%) results homogeneous probabilistic-statistical approach proposed consider avoid unreasonably optimistic forecasts stability. gives SF, differs by 8% values obtained This substantiating improve results. Practical value. regularity changes depending terms mining-geological mining-technical conditions Kachar deposit,