无线电波透视多频率探测法在厚煤层工作面构造探查中的应用

Application of Radio Wave Penetrating Multi-frequency Detection Method in Structural Exploration of Thick Coal Seam Working Face

在煤矿井下回采工作面开展无线电波透视探测时,受不同煤层、各种岩层和地质构造影响,其无线电波透视衰减系数不同。对于同一煤层、同一频率发射的无线电波来说,煤层越厚,衰减系数越高。为了准确探测厚煤层工作面内部地质构造赋存情况,通过多频率试验选取适合的天线进行无线电波透视,经过多种频率的探测结果与实际揭露的地质构造特征进行相互对比,确定了一种针对厚煤层大面宽工作面无线电波透视的探测天线,提高了探测精度。

When conducting radio wave penetration detection in underground mining faces,the attenuation coefficients of penetrating radio wave vary due to different coal seams,rock layers,and geological structures.For radio waves emitted from the same coal seam at the same frequency,the thicker the coal seam,the higher the attenuation coefficient.In order to accurately detect the presence of internal geological structures in thick coal seam working faces,suitable antennas for radio wave penetration were selected through multi-frequency tests.By comparing the results of detections at various frequencies with the actual revealed geological structure characteristics,a detection antenna suitable for radio wave penetration in large-area working faces of thick coal seams was determined,thereby improving detection accuracy.