裂隙岩体的渗流特性研究

砂及土体的渗流特性可由达西定律得到很好的描述。但对于岩体，因其内部裂隙的交叉贯穿分布致使岩体的渗生复杂化。Ｄｉｅｎｅｓ提出的裂隙统计成功地解释了岩体中发生的渗流现象。笔者在此基础上建立起一个新的渗流模型，着重考虑了３个因素，即：流体通过第五裂湎的平均流量；单位体积内裂隙的数密度裂隙贯通程度（比例）。根据随机理论与流体通过单一裂隙的水动力学理论，获得了渗透率的积分表达式，其形式与各向异性介质中的达西

A Study on Seepage Characteristic of Crack-rock

The seepage characteristics of sand and soil can be well described by Darcy's law. But to rock,this is very complicated because the cracks exist in it.The statistic theory of cracks put forward by Dienes successfully expounded the seepage phenomena observed in rocks. On the basis, this paper set up a new seepage model. Three parameters were considered in this new model,i.e, the average rate of fluid through every crack,the number density of cracks in per unit volume and the extent of cracks' penetrance.Base on the stochastic theory and hydrodynamics theory of fluid through a single crack,integral formulas of permeability were set up and their forms were consistent with Darcy' s law in inhomogeneous media.