高密度视电阻率法在含煤层探测方面的应用

Application of High Density Apparent Resistivity Method to Detection of Coal Layer

基于高密度视电阻率法快速高效、信息丰富、成本低廉等特点,选择施伦贝尔装置探测地下含煤层。结合不同岩(矿)石和已知断裂构造电性特征分析,推断104线10~23m深度存在小型充水溶蚀构造,含煤层分布于110线137.5~142.5测段和116线高阻区域,为完整灰岩。通过钻探施工,在ZK01钻孔11.1~21.5m发现蜂窝状溶蚀构造;ZK02号钻孔中见含煤层,全孔岩石破碎无岩芯;ZK03钻孔1.3~38m为完整灰岩。3个钻孔结果与推断认识基本吻合,从侧面说明了高密度视电阻率法在灰岩地区寻找隐伏含煤层,为后期钻孔布设提供了重要的依据。

Since the high density apparent resistivity method has the advantages of high efficiency,large information and low cost,Schlumbeger array are chosen to detect underground coal mine.Taking electrical properties of various rocks and the known fault structure as references,it is concluded that the corrosion structure with water inside is at the depth between 10 and 23 meters of line 104;the coal mine locates in the section of 137.5~142.5 of line 110 and the high resistivity of line 116 is covered with integral limestone.After drilling,alveolate corrosion is found from 11.1 to 21.5 meters in ZK01;the coal mine is explored in ZK02 and full bore rock crushes without core;the integral limestones are covered from 1.3 to 38 meters in ZK03.The three borehole results are basically consistent with the inferred ones,which explains indirectly high-density apparent resistivity method to searchconcealed coal seams in limestone areas and provides the basis for later drilling layout.