【摘要】 文章从电磁波在矩形巷道中的传输特性出发,分析了电磁波低于和高于截止频率的衰减特性,总结了井下各种电磁辐射干扰源产生干扰的情况。通过对井下电磁干扰实测数据的分析,得出井下电磁干扰的频段主要为500 MHz以下;当干扰源与通信和监控系统的距离为几米远时,其对系统基本不会产生影响。更多还原

【Abstract】 From the transmitting chracteristics of electromagnetic wave in rectangular tunnel,the(paper) analyzed attenuation characteristics of electromagnetic wave under and hyper cut-off frequency,and summarized(instances) of electromagnetic radiation interference source in coal mine.It got the conclusion that the main frequency range of electromagnetic interference was under 500 MHz in coal mine through analyzing the test results of electromagnetic interference,and it could not influence the communication and monitoring and control systems basically which were away from interference source about some meters.更多还原