本文从岩体裂隙密度、张开度、裂隙迹长、粗糙度、以及方位等介绍了岩体与一般物体的区别,说明岩体裂隙是一个复杂的三维结构。在对岩体裂隙基本特征进行分析,并对岩体裂隙渗透注浆做了6种基本假设,忽略裂隙粗糙度等建立了单裂隙模拟渗透注浆扩散系统模型,模拟研究了不同影响因素下注浆浆液在单裂隙中的渗透扩散规律及扩散距离的变化。 This paper introduces the difference between rock mass and general object from the rock mass fissure density, opening degree, fissure track length, roughness and azimuth, which shows that the rock mass fissure is a complex three-dimensional structure. Based on the analysis of basic characteristics of rock mass fissures and 6 kinds of basic assumptions on rock mass fissure infiltration grouting, the model of single-fissure seepage grouting and diffusion system was established by ignoring crack roughness. The effects of different factors Slurry penetration and diffusion in single fracture and diffusion distance variation.