In view of the fact that surcharge loading caused by structures, machines, etc, is a common destabilizing force in most mining and civil engineering applications, Chukka et al. A plane failure (aka block sliding) generally occurs in hard or soft rock slopes with well defined discontinuities and jointing, e.g, layered sedimentary rocks, volcanic flow rocks, block jointed granite, foliated metamorphic rocks ]3,, ,, ). The rock slopes often have discontinuities in various forms, resulting in different types of slope failures, such as plane failure, wedge failure, circular failure, toppling failure and buckling failure (,, ,, ). This happens mainly because of heterogeneous and anisotropic characteristics of rock masses. A numerical example is illustrated to explain the calculation steps so that the developed design charts can be used conveniently.Ĭivil and mining engineers generally face a challenge of getting realistic values of the factor of safety of the excavated or natural rock slope against plane failure. Though the analytical expression can be used to calculate the factor of safety, practising engineers generally prefer the use of design charts. These parameters are: inclination of the slope face, inclination of the joint or discontinuity plane, unit weight of the sliding rock mass, shear strength parameters of joint materials, depth of tension crack, depth of water in tension crack, surcharge and seismic loadings, and the stabilizing force and its inclination. The expression considers several parameters that govern the stability of the slope. In recent past, a generalized expression has been presented for the factor of safety of the rock slope against plane failure. There are several modes of failure in which a rock slope can fail a plane failure is one of them. Rock slope stability analysis has been a challenging problem for civil and mining engineers.
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