岩溶山区危岩稳定性分析及危害性预测——以贵州松桃县长冲危岩体为例

岩溶地区山体岩石裸露，地形坡度陡，其发育的危岩体一旦失稳，将对威胁区的居民生命财产造成严重危害，故及时准确地分析灾体的稳定及危害性极具意义。文中以贵州省松桃县和平社区长冲组危岩体为对象，结合工程勘查成果，分析了危岩体区的地形地貌、地质构造和水文特征等孕灾背景，并结合危岩体发育特征深入分析论证危岩体变形破坏模式及影响因素。在此基础上对危岩体稳定性进行定性及定量分析，评估了危岩体的危害程度及发展趋势。结果表明：发育于岩溶山区的危岩体，独特的喀斯特地貌、岩溶特征及复杂的结构面是控制其稳定性的关键因素，降雨、风化等作用为主要诱发因素。提出了初步防治方案建议，为后续采取治理措施提供参考依据。

Stability analysis and hazard prediction of dangerous rock masses in karst mountainous area: A case study of Changchong dangerous rock mass in Songtao County,Guizhou Province

In karst areas, the mountains are bare and the terrain is steep. Once the dangerous rock mass developed instability, it will threaten the lives and properties of the residents. So it is significant to analyze the stability and hazards of the disasters in a timely and accurate manner. Taking the dangerous rock mass of Changchong Group in Heping Community, Songtao County, Guizhou Province as the object, combined with the results of engineering survey, the disaster-generating background of the dangerous rock mass areas, such as topography, geological structure and hydrology, were analyzed, and the development characteristics of the dangerous rock mass were analyzed deeply. The failure mode and influencing factors of dangerous rock mass was demonstrated. On this basis, qualitative and quantitative analysis of the stability of the dangerous rock mass was carried out, and the hazard degree and development trend of the dangerous rock mass are evaluated. The results show that the unique karst landforms, karst features and complex structural planes of the dangerous rock mass developed in karst mountainous areas are the key factors controlling the stability, and rainfall and weathering are the main inducing factors. A preliminary prevention plan has been proposed to provide a reference for subsequent treatment measures.