Abstract: Dangerous rock is one of the typical geologic disasters in the Thme Gorges reservoir，and is result from multi—factors in．teraction in disorder such as geologic strata， geomorphologic characteristic， fissure water pressure and earthquake etc． On the basis of possible failure mode for dangerous rock to fracture， the authors divide dangerous rocks into five mod el， i．e．topple dangerous rock ，slide dangerous rock，stretch dangerous rock，blow_ up dangerous rock and fracture dan gerous rock in this paper．According to main load compose to cause da ngerous rock fracture in the region，the authors found stability analysis every model using limit equilibrium theory．The method have been gotten the extensive application in stability analysis and control in the region

Key words: dangerousrock, failuremodel, stabilityanalysis

摘要： 危岩是三峡库区主要的地质灾害之一，是地层组合、地貌特征、水动力因素及地震等因素耦合异变的结果．按危岩体发生崩塌时可能的失稳破坏模式将危岩分为倾倒式危岩、滑塌式危岩、拉裂式危岩、鼓胀式危岩和错断式危岩5类．笔者根据三峡库区危岩破坏的主要荷载组合，运用极限平衡理论建立了危岩稳定性分析方法．该计算方法已经在三峡库区的危岩稳定性分析及治理工程中得到广泛应用

关键词: 危岩, 稳定性, 类型