滇中引水工程设置了大量的沟道型弃渣场，部分分布在高地震烈度区，一旦在地震作用下发生失稳，可能会进一步诱发滑坡、泥石流等重大地质灾害。分析滇中引水工程15个典型沟道型弃渣场的地震时程响应，研究了弃渣场峰值加速度的分布规律，探讨地基坡度和坡面宽平台对峰值加速度的影响规律；拟合适用于弃渣场的加速度放大系数方程，研究坡面平台以及“凹状”地形对加速度放大系数的影响；分析3种不同地形弃渣场的最大总应力和峰值动剪应力分布特征。结果表明：坡面宽平台会形成局部鞭梢效应，加速度被进一步放大；加速度增大的方向大致与地基坡度相垂直，且“凹状”地形会减弱地震加速度的放大效应；弃渣场的最大总应力和峰值动剪应力一般出现在最大堆高对应的地基渣体接触处；当地基坡度有突变或有较大起伏时，突变或起伏处的最大总应力和峰值动剪应力都有所增大。研究成果为沟道型弃渣场的设计和安全稳定分析提供支撑。

A large number of ditch slag dumps are set up in Central Yunnan Water Diversion Project, some of which are distributed in the high seismic intensity area. Once the instability occurs under the action of earthquakes, it may further induce major geological disasters such as landslide and debris flow. The seismic time-history response of 15 typical slag dumps in central Yunnan diversion project was analyzed, the distribution of peak acceleration was studied, and the influence of foundation slope and wide platform on peak acceleration was discussed. The equation of acceleration amplification coefficient was fitted, and the influence of platform and "concave" terrain on acceleration amplification coefficient was studied. The distribution characteristics of maximum total stress and peak dynamic shear stress for three landforms of slag dump were analyzed. The results show that the local whipping effect will be formed on the platform, and the acceleration will be further amplified. The direction of acceleration increase is roughly perpendicular to the slope of the foundation, and the "concave" terrain will weaken the amplification effect of earthquake acceleration. The maximum total stress and peak dynamic shear stress of the slag dump generally appear at the contact position between the slag body and the foundation corresponding to the maximum pile height. When the slope of the foundation has a sudden change or large fluctuation, the maximum total stress and peak dynamic shear stress will increase at corresponding position. The research results provide support for the design and safety and stability analysis of ditch slag dump.