岩体分形裂隙网络系统中水流动研究进展

以分形几何理论和岩体裂隙系统统计地质资料为基础,建立描述岩体裂隙网络系统几何特性的分形模型.考虑到裂隙长度、开度、位置和间距等几何参量的分形特性,建立基于Monte-Carlo模拟的岩体的裂隙网络系统模型随机生成方法.回顾了岩体裂隙网络系统几何参数的分形分布模型以及离散分形裂隙网络系统建模方法、单个裂隙以及裂隙系统水流动数值模拟方法和裂隙系统等效渗透系数估计方法.对岩体裂隙网络系统的分形几何结构进行研究,使得裂隙网络几何模型真实反映岩体裂隙的结构特征、水流动和溶质传输数值模拟模型更接近岩土工程实际原型、预测结果更加准确,在物理本质上揭示分形裂隙岩体水流动和溶质传输机理.

Some progress of water flow in fractal fractured rock mass

Based on fractal theory and in-situ statistical data of fracture system in rock mass,the fractal model of the geometry parameters of rock fracture system is proposed.Taking account of the fractal characteristics of length,width,spacing and location of fracture system,the fracture network system randomly generated is reconstructed by using Monte-Carlo simulation algorithm.The distribution models of fracture network system,reconstruction of fractal geometry system,numerical simulation methods of water flow in a single fracture and fracture system,and estimating equivalent permeability of fracture system are discussed,respectively.Based on randomly walking method,the randomly walking characteristics of solute in rough surface fracture are analyzed.In order to describe accurately the influence of fracture surface roughness to the solute sorption properties,the fractal sorption model is proposed by adding surface fractal dimension to the classical sorption model.