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Toppling failure is one of the main types of rock slope instability. Based on the Goodman-Bray toppling stability analysis model, the starting mechanism and criteria for toppling deformation are deduced. Combined with the discrete element numerical simulation method, the evolution failure mode of the toppling slope is studied, which can better reflect the basic regularity of the toppling failure, and provide support for slope engineering. In order to predict the influence of the foot displacement of the leading edge on the slope surface displacement, several monitoring points are set at the boundary of the slope and the bend of the toppling body. It is of great engineering significance and practical value to make safety early warning in time.

Research of Toppling Criterion and Analysis of Instability Evolution of Toppling Deformation Slope