The purpose of this paper is to study the intensity attenuation characteristics of fault zone under the action of blasting accumulation and its influence on the evolution law of bedding rock landslide. Through the comprehensive method of field test, indoor shaking table test, theoretical model analysis and FLAC3D numerical simulation, we analyzed the evolution stage of landslide under different accumulative action, and established the evolution stage identification and vibration safety criterion of landslide by using the theory of H index and energy probability entropy. The results show that the internal mechanical characteristics and state changes of slope have significant influence on landslide risk, especially in the early stage of dynamic external force, dynamic load parameter strength plays a decisive role in slope stability. Based on numerical simulation, we determined the number of cyclic loads corresponding to slope critical instability under different stability coefficients, which provides an important reference for landslide warning.

Temporal variability in the macro-mechanics and microstructure induced by periodic water fluctuations during reservoir operation is widespread but adverse for slip zone soils. Herein, taking the slip zone soils of Huangtupo No. 1 landslide in the Three Gorges Reservoir area as a research case, the consolidation undrained (CU) triaxial tests coupled with wetting-drying cycles are organized to address macroscopic temporal variability of shear strength parameters. Then, quantitative microscopic characterizations are performed based on X-ray diffraction (XRD) and scanning electron microscopy (SEM) combined with mercury compression test (MIT). Eventually, the macro and micro connections are identified via gray rational analysis (GRA) and dynamic time warping (DTW) to be thus mathematized. Moreover, the weakened constitutive model is constructed. The test results show that the temporal variability of macroscopic shear strength parameters can be quantified as negative exponential decay. The wetting-drying cycles prominently contribute to the generation of intra-agglomerate pores (0.9-35 mu m). Besides, the inter-granular pores (0.007-0.9 mu m) and porosity are the connections to bridge microstructural parameters and macroscopic shear strength parameters. Furthermore, empirical equations for macro and micro connections are tentatively derived; the temporal variability of slip zone soils is invited to appropriately model the weakening laws of stress-strain. This study is expected to provide ingenious perspectives and promising references in stability evaluation and even disaster prevention of reservoir landslides.