【摘要】 使用蒙特卡洛方法建立了随机裂隙网络,并使用分形几何方法建立了不同水力隙宽裂隙的非饱和水力参数。在此基础上,根据流量平衡原则,计算了不同毛细压力下的随机裂隙网络的有效饱和度和不同方向上的相对渗透系数,发现不同方向上的相对渗透系数差别不大。并使用VG模型对计算结果进行了拟合,拟合结果发现,VG模型值和数值计算结果吻合较好,验证了VG模型对随机裂隙网络也是适用的。更多还原

【Abstract】 The random fracture network is generated by using Monte Carlo method,and unsaturated hydraulic parameter is build by fractal geometry method for different hydraulic aperture fracture.According to single fracture unsaturated hydraulic parameter and flow equilibrium rule,the effective saturation and relative permeability of this random fracture network are calculated under different capillary pressure and the results are fitted by VG model.Simulation results indicated that VG model can generally describe the characteristics of unsaturated flow in random fracture network and relative permeability of different direction can use one relative permeability to describe.更多还原