中文摘要：

精确地预测接收点天线的无线信号强度大小对于保证矿下生产安全和生产效率是非常有必要的。由于巷道内存在多种模式的电磁波,仅对基模作用下电磁波特性分析不够准确,而对所有模式电磁波特性分析非常困难甚至是不可能的。从场强的角度把接收点天线检测到的电磁波的所有模式分成五个不同的组,分别研究了在不同矩形巷道条件下的信号强度在总信号强度中所占的比例。仿真结果表明,传播距离越大,频率越低,巷道的横截面积越小,电磁波的传播特性时,需考虑的电磁波模式越少,部分高次模可以不考虑,简化了天线电磁波的传播模型,为天线信号准确探测提供参考。

英文摘要：

Predicting the wireless signal strength of the receiving antenna point accurately for ensuring mine pro- duction safety and production efficiency is very necessary. There are various modes of electromagnetic wave in the tunnel, only considering the electromagnetic properties of the fundamental mode is not accurate enough, but consider- ing all modes of electromagnetic wave characteristic is very difficult or even impossible. In this paper, all propagation modes are divided into five mode groups to study the field distribution for different conditions in a rectangular tunnel. The simulation results show that under certain conditions, to study the propagation characteristics of electromagnetic wave, we can only take the first 25 modes of the electromagnetic wave into account, some higher modes can be ig- nored, and the propagation model of electromagnetic waves can be simplified.