Abstract:Based on systematic analysis of the composition and destabilized law of displacements of the debris landslides,a detailed research is performed on the dynamic features of the nonlinearity,catastrophe and fractal dimension decrease in the destabilized process in terms of the basic principle of fractals. Firstly,the displacement dynamic parameter of fractals—displacement Hurst index is determined by means of R/S analysis method. Secondly,taking the typical debris landslides—the Xintan landslide and the Huanglashi landslide as the practical examples,the correlation between the Hurst index of displacement and the stability of the Huanglashi slope is carried out;and the computation of the Hurst index of displacement during the destabilized process of the Xintan landslide is completed. It is found that the Hurst index of displacement of the Xintan landslide decreases before the destabilized time of the landslide;and the occurrence time of the Hurst index decrease agrees well with the destabilized time of the landslide. The above computational results show that the Hurst index of displacement is an effective nonlinear parameter of fractals for evaluating debris slope stability and it can be used in the nonlinear dynamic prediction for the destabilized trend of the debris landslides.