基于注浆支护的巷道围岩浆液扩散规律研究

注浆工程的隐蔽性导致浆液在岩体裂隙内扩散渗透规律研究无法表面、直观，注浆机理研究存在一定不足。通过Comsol Multiphysics数值模拟软件建立模型来模拟在静水条件下改变水灰比、裂隙张开度、注浆压力等参数浆液扩散规律的变化，并模拟浆液扩散不同位置渗透压力的变化，发现浆液呈圆形扩散以及不同参数条件下渗透压力和扩散距离的变化规律。研究得出:浆液有效扩散距离随裂隙张开度基本呈线性递增，张开度对浆液扩散距离改变明显，浆液渗透扩散对裂隙张开度较敏感；渗透压力随浆液扩散有效距离增加而降低。研究为巷道围岩注浆加固提供一定的理论依据。

Study on slurry diffusion law of roadway surrounding rock based on grouting supporting

Because of the concealment of grouting engineering，the study of grouting diffusion and permeability in rock mass cracks can not be superficial and intuitive，and there are some deficiencies in the study of grouting mechanism.By using Comsol Multiphysics numerical simulation software，a model was established to simulate the variation of grout diffusion law under hydrostatic conditions with different parameters such as water-cement ratio，crack opening and grouting pressure，and to simulate the variation of seepage pressure at different locations of grout diffusion，it was found that the slurry showed circular diffusion and the variation of permeability pressure and diffusion distance under different parameters.The results show that the effective diffusion distance of slurry increases linearly with the fracture opening，and the opening degree changes obviously with the slurry diffusion distance，the slurry permeation diffusion is more sensitive to the fracture opening，and the permeability pressure decreases with the increase of the effective diffusion distance of slurry.The study provides a theoretical basis for grouting reinforcement of roadway surrounding rock.