拉裂变形体作为一种特殊的地质分离体，其稳定性评价方法尚不成熟。以某水电站坝前右岸拉裂变形体为例，采用二维极限平衡方法分析了各运行工况下边坡治理前后的稳定性。基于外部变形、测斜仪和滑动测微计的监测成果，结合具体地质情况，对边坡的可能滑面位置和滑动可能性进行了探讨。分析结果表明，“破碎带”的错动是边坡变形的主要原因，施工期拉裂变形体总体趋于稳定。

 For a tension-fracture rock mess as a specially geologically isolated body, the method to evaluate the stability of the kind of rock mass is still immature. With the tension-fracture rock mass of the right bank of some hydropower station as an example, the safety factors before and after regulation are calculated by the two-dimensional limiting equilibrium method, and then according to external deformation observed results, and the monitored data from the inclinometer and the sliding micrometer, the position of possible sliding face and the slide possibility are discussed in this paper. We come to the conclusion that the slippage of “ fracture zone ” is the main reason of the slope deformation and the slope mainly tends to be stable in the construction period.