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为了提高隧道以及煤矿巷道超前探测准确度,在总结前人研究成果的基础上,结合超前水平钻孔法和直流电阻率法,改变传统探测电极后置的方法,在工作面向前钻孔并在孔内布置探测电极,建立直流电法超前探测模型进行正演研究,利用Matlab处理数据,对比分析了在巷道后方布置探测电极和工作面钻孔内布置探测电极得出的视电阻率曲线,以及巷道内存在干扰体的影响下的视电阻率对比曲线图。结果表明,在工作面钻孔内布置探测电极进行孔内直流电法超前探测受巷道内干扰体影响较小,更为灵敏准确。
In order to improve the accuracy of advanced detection of tunnel and coal mine roadway, based on the previous research results, combined with advanced horizontal drilling method and direct current resistivity method, The detection electrodes are arranged in the holes and the forward detection model of the DC method is established for forward modeling. The data are processed by Matlab, and the apparent resistivity curves obtained by arranging the detection electrodes in the rear of the roadway and the detection electrodes in the drilling face are compared and analyzed. Apparent resistivity contrast plot of memory affected by interfering body. The results show that it is more sensitive and accurate that the detection electrode arranged in the borehole of the working face and the direct current method in the bore ahead detection is less affected by the interfering body in the roadway.