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为有效防治贵州坡立谷地区,大量抽取地下水而引发的岩溶塌陷地质灾害的再次发生,以较典型的贞丰岩鱼坡立谷岩溶塌陷为例,通过对诱发因素和岩溶塌陷形成的力学模型的分析,得出引发塌陷机理特征为:红粘土“上硬下软”的状态;地下暗河的反均衡水力坡度;大降深的抽取地下水.经验算,该类地质条件下抽水应控制地下水位最大降深在15 m以内,且尽量分散布井抽水,避免集中抽水导致大降深水位的出现.
In order to effectively prevent and deal with the reoccurrence of geological disasters caused by karst collapse caused by pumping large amounts of groundwater in Guizhou Province, taking the typical Liupu karst collapse of Zhenfeng rocky fish as an example, the author analyzes the mechanics model of the causative factors and karst collapse , We can draw the conclusion that the characteristics of the collapse mechanism are as follows: red clay “hard on the soft ” state; anti-equilibrium hydraulic slope of the underground river; deep extraction of groundwater.According to experience, pumping under such geological conditions should control groundwater Maximum depth of 15 m or less, and as much as possible scattered well pumping, to avoid concentrated pumping lead to a large deep water level.