摘要
文中对矿井中电缆漏泄、电火花、电网电压波动以及大型设备的启停等所产生的电磁干扰进行了分类研究。通过对矿井的巷道结构,电波在矿井中传播所遵循的帐篷定律,巷道中收发天线所处的位置,煤层与巷道支护材料电特性,粉尘水汽雾滴等电磁散射特性的讨论,分析了电磁波传播过程中的时延、衰落和损耗,并结合电磁波折射理论,就不同频率及水平极化和垂直极化两种方式的电磁波,在矿井中的传播特性进行了综合的研究分析发现,电波频率越高,损耗越大,水平极化的电波损耗要小于垂直极化的电波损耗,矿井中收发天线放置在与巷道壁一定距离的中上部位置为最佳。
The paper discusses the electromagnetic interference caused by the cable leakage,electric spark,voltage fluctuation,as well as the start-and-stop of large equipments analyzes the time delay,fading and loss of electromagnetic wave propagation in accordance with the structure of the mine,tent law,location of antenna,coal and concrete electric parameters,electromagnetic scattering features of smut,vapor and fogdrop.Based on mine electromagnetic environment and electromagnetic wave refraction theory,the conclusion is achieved that the loss of horizontal polarization is lower than that of vertical polarization,and the higher the frequency,the more the loss.In consideration of the installation factors,the right location of antenna is in upper part of the tunnel with a certain distance away from the top.
出处
《通信技术》
2010年第3期54-56,182,共4页
Communications Technology
基金
中国博士后科学基金资助项目(编号:20080431134)
关键词
电磁干扰
电波传播
帐篷定律
煤层电特性
极化
electromagnetic interference
electromagnetic wave propagation
tent law
coal electric parameter
polarization
