Numerical Slope Stability Analysis of Deep Excavations Under Rainfall Infiltration

Rainfall leads to the deterioration of slope stability conditions, while intense rainfall has been commonly associated with landslides on natural or engineered slopes. Deep excavations, typically related geo-resources exploitation, e.g., in case surface mining, are often affected by events that jeopardize their stability. In this work, infiltration is directly incorporated analysis; investigation currently missing from literature as mainly empirical methods used regarding deep excavations. The very slopes lignite mines employed typical examples, reaching 200 m and presenting smooth inclinations fine-grained soils. A general numerical framework was used; safety factor’s deterministic analysis supplemented a Monte Carlo determine probability failure. importance involved parameters—slope geometry, intensity, soil properties—was studied through parametric analysis. Initially, slip presented, relatively toe crest. critical mechanism development—after rainfall—of smaller more local than initial (before rainfall) surface. Although final one, it can be 50 high denoting significant hazard. most influential parameters permeability, height. This study serve basis for similar preliminary practice. Stability reliability reveals need supplement conventional factors failure broader improved overview.