In shallow hypergene zone,the shift of elements is of long-term and complicated feature and is influenced by a lot of factors,which plays an important role in destabilization of slope.

The method of fuzzy comprehensive analysing and evaluating slope stability on catastrophe theory;

In this paper,based on Interval Theory,a new reliability analysis method of slope stability in permafrost regions with small sample size is proposed.

Resistivity responding characteristics reflecting soil slope instability;

Starting from several aspects affecting the slope instability , the paper analyzes the causes of the slope instability.

Failure of debris flow fan is distinct from the common rock and soil slope failure due to the unique geotechnical features of debris flow sediment.

This paper takes the slope failure as a system to qualitatively analyze the mechanism in the process of the slope failure,sets up the solid fluid coupling mathematical model and makes coupling analysis of the stress and displacement by practical examples Reliability of the model has been validated.

Using resistivity as index and referring to the law about effecting of slope to resistivity, the apparent resistivities of geophysical model concerned with unsteady rock type slope failure have been calculated systematically by using the boundary integral equation method.