高阻层状煤质中电磁波传播特性研究  

Electromagnetic Wave Propagation Characteristics in High Resistivity Coal Seam

作　　者：于业斌 岳建华[2] 邓帅奇[2] 

机构地区：[1]山东正元工程检测有限公司,山东济南250000 [2]中国矿业大学,江苏徐州221008

出　　处：《工程地球物理学报》2011年第4期412-416,共5页Chinese Journal of Engineering Geophysics

摘　　要：在煤层中传播的电磁波其特性与在均匀大地中有很大不同,通过建立更加逼近实际煤田地质情况的三层地质模型,求得在高阻煤层中电磁场及其传播常数表达,基于此公式利用matlab编程绘制了在单一参数变化下电磁波传播常数变化关系曲线。计算结果说明煤层中电磁波传播受到煤层电性、工作频率及顶底板岩石电性和煤层厚度的影响,其传播常数值与电磁波工作频率、煤层电导率成正比;与围岩电导率、煤层厚度成反比;这一结论比较有效地符合实际工作经验,并为利用无线电波法探测煤层厚度变化,及顶底板完整性提供了理论依据。实验还为以三层介质模型中电磁场公式为基础,编制针对高阻煤层电磁波层析成像模块提供了可行性。Based on studying the layered media electromagnetic theory, the paper obtained propagation constant expression in high resistance seam. It can be more effective to describe the electromagnetic wave propagation characteristics. And also based on this expression we use Matlab to depict relation curve of propagation constant with frequency, conductivity and seam height. The Conclusion is that the propagation constant in high resistance seam decreases with the seam height and the conductivity of the surrounding sediment layers. The propagation constant increases with the increased coal conductivity and frequency.

关 键 词：坑道无线电波透视 电磁波传播常数 高阻层状煤质 

分 类 号：P631.3[天文地球—地质矿产勘探]