为掌握煤层水平井中随钻电磁波仪器探测影响因素，通过有限元数值模拟采用多频、多线圈距的正交耦合线圈进行边界探测研究，确定了仪器线圈最佳排布非对称方式，并获得了适合高阻煤层的频率、源距、线圈间距的优化工作参数选择。

通过正交线圈与倾斜线圈对比研究，发现倾斜线圈时定向信号虽然理论上幅度比信号随着线圈距增大在增强，但实际的倾斜线圈感应电动势的幅值却随着线圈距增大而减小，增大了信号采集的难度。通过研究设计了一种适合煤矿使用的方位电磁波电阻率正交线圈系结构，满足高阻情况下同时具备电阻率和界面探测的功能，获得了适合高阻煤层的频率、源距、线圈间距的优化参数，为煤矿井下孔内顺煤层方位电磁波探测技术提供基础。

This study aims to determine the factors influencing the detection performance of the electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining in horizontal wells. Through finite element numerical simulations, this study conducted boundary detection using orthogonal coupling coils with multiple frequencies and coil pitches. This allowed for determining the optimal asymmetric arrangement of coils, as well as the optimal working parameters of frequency, source-detector separation distance, and coil pitch suitable for high-resistivity coal seams.

The comparative study of orthogonal and inclined coils reveals that in the case of directional signals of inclined coils, although the amplitude ratio signals were theoretically enhanced with an increase in the coil pitch, the actual amplitude of induced electromotive force in inclined coils decreased. This complicates signal acquisition. This study designed an orthogonal coil array structure for electromagnetic azimuthal resistivity measurement for coal mines, enabling concurrent resistivity and interface detection for high-resistivity coal seams. Furthermore, this study obtained the optimized parameters of frequency, source-detector separation distance, and coil pitch for mining of these coal seams. The results of this study provide a basis for electromagnetic azimuthal detection along coal seams in wells in underground coal mines.