长沙市某区域岩溶塌陷危险性评价

岩溶塌陷对人民和财产安全，造成严重危害。对长沙市某勘察区岩溶塌陷进行危险性评价，是保证塌陷治理使其稳定的重要前提。在调查的基础上，探讨了塌陷的形成机制和诱发因素，并选取岩溶发育特征、覆盖层的特征、水动力条件、地貌条件、自然因素和人为因素作为权重因子，对勘察区进行了定性经验指标预测法评价。其结果是岩溶塌陷处于中等-强烈发育阶段，且具高频率、高密度特点。针对评价结果提出了主要防治措施，以确保安全。

Risk Assessment on Karst Collapse in a Region of Changsha

Karst collapse endangers to the personal and property safety seriously. Risk assessment in relation to an area for karst collapse survey in Changsha was conducted and an important prerequisite to control the collapse and increase the stability. Based on the survey, the forming mechanism and inducing factors of the collapse were discussed, and then by selecting the karst development and overburden features, hydrodynamic and geomorphic conditions, natural and human factors as the weighting factors, qualitative assessment by means of experience index predication was conducted for this area. The result shows that the karst collapse is in the state of moderate-intense development with the characteristics of high frequency and high density. In connection with the assessment result, the prevention measures were proposed to ensure the safety.