Method for slope stability analysis: The slope stability is usually expressed as the ratio of the resisting force to the sliding force on the surface which is the coefficient of stability against sliding. The greater of the ratio is, the slope is more stable.The most important analyses of slope stability are seeking the factor of safety, which is a traditional measure of the safety margin. And the following methods are commonly used to evaluate the slope stability.
The above two figures simply illustrate the explanation regarding the possibility of the slope failure if the plane failure is at the low dip than the slope angle. The dip angle discontinuity is illustrated to be increasing, and the illustration can be easily shown by being sub-parallel to the slope angle, and the relative slope seems to be becoming stable in nature. The discontinuity is being shown to be further increasing in dip angle, and it enables to undergo the toppling failure. Qualitative analysis: Through the analysis of the slope size and shape, the geological structure of the slope, the geologic environment and the process of forming the slope, the soil properties, deformation and fracture of the slope and the factors affect its stability and then determine the slope evolution phase and stable conditions.