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桂林市全州县洛潭水库常年处于不能正常蓄水状态,水量少,水位浅,为了查明桂林市全州县洛潭水库岩溶渗漏带发育的位置,为帷幕灌浆提供依据,笔者采用综合物探方法对库区进行研究,研究结果表明:受碳质灰岩影响,高密度电法及跨孔电阻率透视对低阻异常体辨识度降低,高密度电法低阻反演异常体范围变大,α2装置对低阻异常体的分辨率小于β装置,跨孔电阻率透视在低阻异常段电阻率等值线容易形成圈闭现象;在碳质灰岩地区,地震折射法、地震反射法及微动法受碳质影响小,采用该三方法组合的方式能较好的确定岩溶渗漏带发育的位置及分布范围;1号岩溶渗漏带分别通过7-2测线515~534 m测点段及大坝钻孔ZK1~ZK2,7-2测线534~592 m测点段为1号岩溶渗漏带隐患区;2号渗漏带分别通过7-2测线655~672 m测点段及大坝钻孔ZK7~ZK8,钻孔ZK6~ZK7为2号岩溶渗漏带隐患区,1、2号渗漏带主要为裂隙渗漏.
In order to find out the development position of karst seepage zone of LuoTan reservoir in QuanZhou county of GuiLing county, this paper provides the basis for curtain grouting. The author uses the comprehensive Geophysical and geochemical methods are used to study the reservoir area. The results show that the recognition of low-resistivity anomalies by high-density electrical method and trans-hole resistivity fluoroscopy is reduced under the influence of carbonaceous limestone, and the resistivity inversion range of high- Large and α2 devices have lower resolution than low-impedance anomalies, and traverse resistivity perspectives tend to form traps in resistivity contours of low-resistivity anomalies. In carbonaceous limestone regions, the seismic refraction method, seismic reflection Method and micro-dynamic method are less affected by carbonaceous. The combination of these three methods can well determine the location and distribution of karst leakage zone development. The No.1 karst leakage zone passes through 515-234 m measured point and dam borehole ZK1 ~ ZK2, 7-2 measuring line 534 ~ 592 m measuring point section No. 1 karst seepage zone hidden zone; No. 2 seepage zone through the 7-2 line 655 ~ 672 m measured point section and the dam bore ZK7 ~ ZK8, borehole ZK6 ~ ZK7 No. 2 karst leakage zone hidden zone, No. 1 and No. 2 leakage zone To crack leakage.