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岩溶塌陷是珠三角西部城市肇庆市的第四系覆盖区主要地质灾害之一。分析了肇庆地区地质环境背景,根据已发岩溶塌陷形成原因归纳总结出该地区三种岩溶塌陷机理模式。同时,对可溶岩地区剖分成7092个网格作为评价单元,选取地层岩性、岩溶发育程度、地下水活动、覆盖层条件和地质构造作为评价因子,采用综合指数法对肇庆地区进行岩溶塌陷易发性评价,以期为肇庆地区岩溶塌陷防治提供决策依据。
Karst collapse is one of the major geological disasters in the Quaternary coverage area of Zhaoqing City in the western part of the Pearl River Delta. The background of geological environment in Zhaoqing is analyzed. Based on the formation of karst collapse, the mechanism models of three karst collapse in this area are summarized. At the same time, 7092 grids are divided into 7092 grids in the soluble rock area, and the stratigraphic lithology, karst development degree, groundwater activity, cover conditions and geological structure are selected as the evaluation factors. The comprehensive index method is used to analyze the karst collapse in Zhaoqing area Evaluation, in order to provide decision-making basis for the prevention and control of karst collapse in Zhaoqing area.