根据工程实际，采用非确定性研究方法，视斜坡变形失稳这一客观现象为一模糊事件，将传统的安全系数与边坡破坏模糊概率测度联系在一起，建立了边坡稳定性分析的模糊数学模型。利用该模型可对斜坡稳定性进行具体分析评价。通过具体计算分析结果表明，对岩质边坡，其安全系数临界值不应小于1.15。

Based on the statistical analysis of a large amount of measured data in slope enginering, a slope failure can be regarded as a fuzzy event. A fundamental fuzzy model for describing slope failure is established by using the theory of fuzzy probability measures in combination with the conventional safety factors of the slope. This model may be applied to predict the slope failure and to evaluate its stability. The calculation results through an illustration show that the critical value of the safety factor(F) for the rock slope should be greater than 1.15.