井下高密度电法在矿井防治水的应用——以解决运煤通道底板下沉为例

根据高密度电阻率法的工作原理、装置形式和异常特点,利用井下高密度电法技术对西山煤电运煤通道东曲段底板下沉区域进行探测。探测采用高密度直流电法温纳装置,布置电极总数64路,电极距5m,剖面总长度320m。对采集的数据通过基于圆滑约束最小二乘法反演,获得电阻率成像断面色谱图,结合已知异常地质体的电性特征,对矿井含水层富水性进行评价。解释结果表明运煤通道东曲段底板存在一个低阻异常区,且上下连通,应作为底板水防治的重点区域。该结论已得到钻孔验证。

Application of Underground High Density Electric Methodin Mine Water Control——A Case Study of Coal Haulage Road Floor Subsidence Solution

Based on high density resistivity method operational principles, installation configuration and anomaly characteristics, using underground high density electric method technology carried out prospecting in Xishan Coal Electricity Group coal haulage road Dongqu sector floor subsidence area. Prospecting used high density DC electric method Wenner installation, deployed electrodes total64 way with electrode spacing 5m, total section length 320 m. Acquired data using smooth constrained least squares method inversion,obtained resistivity imaging section chromatogram, combined with known anomalous geologic body electric characteristics, carried out evaluation of mine aquifer water yield property. Interpreted result has shown that a low resistivity anomalous zone existed, then again connected from top to bottom,and thus should be the key area in floor water control. The conclusion is already verified by drilling.