岩体裂隙开度变化对浆液扩散规律的影响分析

研究岩体裂隙开度变化对浆液扩散规律的影响。将单一裂隙形状简化为椭圆形和矩形,利用广义柱面坐标、牛顿内摩擦定律、达西定律、渗流微分方程、纳维—斯托克斯(Navier-Stokes)方程和边界条件下的连续性方程,推导牛顿液体在两种裂隙形状中渗透注浆的参数关系,对比研究了裂隙开度不变和变化两种情况下浆液的扩散规律。结果表明,开度变化对扩散距离有较大影响。因此,在进行注浆理论研究中,应该建立反映开度变化的裂隙模型,并研究裂隙开度变化对渗透注浆的影响规律。

Influence Analysis of Rock Fracture Aperture Changes on Slurry Diffusion

This paper studies the influence of rock fracture aperture changes on slurry diffusion.The form of single fracture is simplified into ellipse and rectangle to educe permeation grouting parameters of Newtonian liquid in these two forms using generalized cylindrical coordinate,Newton＇s law of internal friction,Darcy Law,seepage differential equation,Navier-Stokes Equation and continuity equation under boundary condition.The diffusion rule of slurry under variable and constant fracture aperture is studied through comparison.The result shows that aperture changes have larger influence on diffusion distance.Therefore,in grouting theory research,fracture model shall be established to reflect aperture changes,and the influence rule of aperture changes on permeation grouting shall be studied.