芒林水库大理岩透镜体岩溶渗漏探讨

Discussion on Karst Leakage of Marble Lens of Wanglin Reservoir

芒林水库坝址及近坝右岸出露大理岩,大理岩中主要矿物方解石和白云石的含量一般>50%,遇稀盐酸产生气泡,因易溶解于水,故有各种喀斯特现象,会引起水库渗漏、崩塌等,需加以注意和工程处理。根据区内大理岩特性、分布特征等方面进行分析,并取样进行岩矿鉴定确定其化学成分,结合枢纽区钻孔岩心鉴定,认为大理岩以透镜状出露,方解石和白云石的含量>50%,岩溶不发育或极弱发育,一般发育溶蚀裂隙,管道式岩溶不发育,不会引起水库岩溶渗漏,为工程顺利开展提供了有力的技术支撑。

Wanglin reservoir dam and near the dam on the right bank of the exposed marble,the contents of main mineral calcite and dolomite marble are generally greater than 50%,with dilute hydrochloric acid to produce bubbles. Because it is easy to dissolve in water,there are various karst phenomena,which will cause reservoir leakage,collapse and so on. It needs to be paid attention to and engineering treatment. This article carries on the analysis according to the regional characteristics of marble,distribution and other aspects,and sampling of rock mineral identification to determine the chemical composition,the hub area core identification with that marble to lenticular exposed,the content of calcite and dolomite is greater than 50%,or very weak is not the development of karst development,the general development of fissures,karst pipe type not development,generally do not cause karst reservoir leakage,provides strong technical support for the smooth development of the project.