Theoretical study on the mechanism of slope sliding resistance and sliding force on multi-field coupling instability

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.