地裂缝是黄土地区的一种典型地质灾害，地震波在地裂缝场地中的传播规律是工程界比较关心的一类问题。为了研究地震波在地裂缝处的传播规律，引用西安地区地裂缝界面的等效刚度系数和裂缝面的接触面连续条件，基于运动方程的基本解答，在考虑转换波产生的前提下得出了求解西安地裂缝处地震波透反射系数的频域方程组。对入射角、入射波频率和地裂缝介质等效力学参数的变化对地震波传播规律的影响进行了分析。结果表明，地裂缝对地震波的传播起到了一定的高频滤波作用，当入射波频率较低时波动的传播主要以透射波为主；等效法向刚度只影响P波的传播，等效切向刚度对P波和SV波都有影响；相对于法向刚度，切向刚度的变化对的透反射系数的影响更为明显。

Ground fissure is a typical geologic hazard in loess field and the propagation law of seismic wave in ground fissure field is widely concerned in engineering world. To analyze the propagation law of seismic wave across ground fissure, the equivalent rigid coefficients of ground fissure in Xi’an field and discontinuous condition of fissure interface are selected. Considering the converted waves, frequency domain equations used to solve the transmission and reflection coefficients are obtained based on the fundamental solutions of the equation of motion. The influence of the incident angle, frequency of incident wave and medium parameters of ground fissure on the propagation law of seismic wave is analyzed. A brief conclusion from the results is obtained that ground fissure possesses the high-frequency filtering properties with the propagation of seismic wave. In low frequency condition, the transmission coefficient is more larger than others. Equivalent normal rigidity only influences the propagation of P-wave, but equivalent shear rigidity influences P-and SV-wave. Relative to equivalent normal rigidity, the influence of the changes of equivalent shear rigidity on transmission and reflection coefficients is more obvious.