中文摘要：

在矩形巷道多波模损耗模型的基础上,为了简化修正传播损耗的有关公式,用累加和化积分的方法将各模式累加的离散形式转换为掠射角积分的连续形式,从而推导出粗糙度损耗积分公式和反射损耗积分公式,并将两种形式的公式进行详细的比较分析。得出结论：两种形式的损耗公式随各相关因素的变化趋势相同,但积分公式结构简单,易于估计、计算和仿真分析。以此为基础,进一步运用仿真分析巷道截面面积、粗糙度及频率对反射损耗、粗糙度损耗和传播损耗的影响,得出相关有用结论。

英文摘要：

On the basis of the multimode loss model in rectangular tunnel,in order to simplify the formula of propagation loss,the formula of roughness loss is deduced using the method of integral which change the discrete form of various modes accumulation to the continuous integral forms of grazing angle. And detailed comparison the two forms of propagation loss formulas and roughness formulas were analyzed. It draws the conclusion that the two forms of loss formula are the same as the change trend of the related factors,the integral representation has simple structure,easy to calculation and simulation analysis. On the basis,uses simulation to further study of the influence of tunnel cross section area,roughness and frequency to reflection loss,roughness loss and propagation loss,draws some useful conclusions.