中文摘要：

为得到电磁波在煤矿井巷的传播特性，分析了矩形空直井巷内电磁渡的多径传播规律。在帐篷定理模型基础上，推导出接收信号入射角求解公式及接收功率计算公式。仿真分析结果显示：载波频率从1Hz增加到5GHz时，信号损耗先增加后减小；通信距离增加导致接收功率衰减变大，且垂直极化波的衰减大于水平极化波；载波频率越低，时延扩展越大；通信距离增加导致时延扩展变大，且垂直极化波的时延扩展比水平极化波小。

英文摘要：

Multipath propagation causes power attenuation and delay spread of the received signal. On the basis of the tent law model, the formula to solve incidence angle of the received signal and the calculation of the received power is derived. Results from simulation show that. the signal loss increases at first and then decreases when the carrier frequency increases from 1Hz to 5GHz; and the received power-attenuation increases gradually with increasing communication distance, moreover, the attenuation of the vertical polarized wave is greater than that of horizontal one. The delay spread is greater with lower carrier frequencyl and the increasing communication distance results in increasing delay-spread; furthermore, the delay spread of vertical polarized wave is smaller than that of horizontal one.