Abstract
In this paper, the applicability of the risk assessment methodology considering socioeconomic loss due to the collapse of discontinuous rock slopes was investigated. In detail, this study selected the slope consisting of the several unstable rock blocks as the example to investigate the occurrence of the various collapsed patterns of rock blocks, and evaluated the occurrence probability of the rock slope failure by adopting Monte Carlo simulation using DDA. The results showed that the proposed method has great possibility to make decision of the rational countermeasures in accordance with expected losses, which were described as monetary value.