Regional Hazard Assessment of Excavation-Disturbed Translational Rockslides in Monoclinal Strata: a Probabilistic Framework Integrating Failure Extent and Runout

This study proposes a probabilistic framework for regional hazard assessment of excavation-disturbed translational rockslides. The framework integrates field investigation, laboratory testing, key stratigraphic parameter prediction, and Monte Carlo limit-equilibrium analysis to quantify slope-unit failure probability under data-limited conditions. It was applied to 139 slope units in the resettlement town of Yanshan Township, Chongqing, where slopes are mainly composed of a shallow surficial deposit, fractured rock mass, weak interlayer, and hard bedrock. After considering excavation effects, a new high-hazard zone of 0.0449 km2, accounting for 3.21