瞬变电磁法在煤矿富水区探测中的应用

Application of water-rich area prospecting of coal mines with TEM

煤矿开采中普遍应用瞬变电磁法对煤层富水区进行探测。研究了瞬变电磁法辅以直流电测深勘探在富水区探测中的应用。瞬变电磁法应用广泛,但是体积效应明显,而直流电测深法的资料处理和解释比较成熟,其测得的视电阻率曲线能够对地层进行较为准确的划分。结合实例介绍了瞬变电磁法的基本原理、野外施工方法,并结合直流电测深建立符合地层信息的瞬变电磁反演模型,通过资料处理、综合分析提高资料的解释精度。实际证明结合直流电测深应用瞬变电磁法探测煤层顶、底板富水区的分布效果良好。

The TEM is commonly used in coal mining to detect the water-rich area of coal seams.We have studied the application of TEM with DC sounding exploration in the detection of water-rich areas.The TEM is widely used,but the volume effect is obvious,and the data processing and interpretation of the DC sounding method is relatively mature,and the measured apparent resistivity curve can accurately divide the formation.This paper introduced the basic principle of TEM and field construction method,and combined DC sounding to establish a transient electromagnetic inversion model that conforms to the formation information,and improved the interpretation accuracy of the data through data processing and comprehensive analysis.It was proved that the application of TEM combined with DC sounding to detect the distribution of water-rich areas in the top and bottom of coal seam was good.