均匀平面电磁波在三种典型媒质中的传播特性分析
Analysis on Propagation Characteristics of Uniform Plane Electromagnetic Waves in Three Typical Coal Seams
庞涵芳 1张敏1
作者信息
- 1. 辽宁工程技术大学电子与信息工程学院，辽宁葫芦岛，125105
- 折叠
摘要
煤炭介质为典型有耗各向同性电介质，孔隙、水分、矿物杂质及煤化程度，会显著改变电磁波传播特性，引发能量衰减、相位偏移、波阻抗变化与波形畸变。本文选取褐煤、烟煤、无烟煤三类典型煤质，基于电磁场理论，通过纯理论推导建立均匀平面电磁波在有耗煤层中的传播模型。推导得到复介电常数、传播常数、波阻抗等参数表达式，分析煤质物性对电磁波幅值、相位、反射及波形的影响。结果显示：煤化程度越低，含水率与电导率越高，电磁波衰减越明显；介电参数影响相位特性，电导率决定能量损耗与穿透能力。三类煤质衰减强度依次为褐煤、烟煤、无烟煤。研究结论均由理论推导得出，可为煤矿电磁探测、井下通信及灾害监测等工程应用提供理论依据。
Abstract
ICoal is a typical lossy isotropic dielectric. Its pore structure, moisture content, mineral impurities and coalification degree can alter electromagnetic wave propagation, leading to energy attenuation, phase shift, wave impedance variation and waveform distortion. Taking lignite, bituminous coal and anthracite as research objects, this paper establishes a propagation model of uniform plane electromagnetic waves in lossy coal seams based on electromagnetic field theory via theoretical derivation. Expressions of complex permittivity, propagation constant and wave impedance are deduced, and the effects of coal properties on electromagnetic waves are analyzed. The results indicate that lower coalification degree corresponds to higher moisture content and conductivity, resulting in severer wave attenuation. Dielectric parameters affect phase characteristics, while conductivity determines energy loss and penetration capacity. The attenuation capacity ranks as lignite > bituminous coal > anthracite. This research provides theoretical support for coal mine electromagnetic detection, underground communication and hazard monitoring.关键词
均匀平面电磁波/煤质介质/有耗介质/传播特性/衰减常数/相移常数。Key words
Uniform plane electromagnetic wave/Coal medium/Lossy medium/Propagation characteristics/Attenuation constant/Phase shift constant引用本文复制引用
庞涵芳,张敏.均匀平面电磁波在三种典型媒质中的传播特性分析[EB/OL].(2026-06-22)[2026-06-24].http://www.paper.edu.cn/releasepaper/content/202606-59.学科分类
矿业工程理论与方法论
