孔隙裂隙双重介质的三维逾渗数值模拟研究  

Numerical simulation of percolation law of 3D porous and fractured double-medium

作　　者：吕兆兴[1] 冯增朝[1] 赵阳升[1] 谭礼平[2] 

机构地区：[1]太原理工大学采矿工艺研究所,太原030024 [2]中国矿业大学力学与建筑工程学院,北京100083

出　　处：《岩土力学》2007年第S1期291-294,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50534030);国家自然科学基金重大项目(No.50404017);山西省自然科学基金资助(No.20051026)。

摘　　要：基于三维孔隙介质的逾渗模型,首次把裂隙这一重要的渗透通道引入到三维逾渗研究中,提出了孔隙裂隙三维逾渗的研究方法,并建立了孔隙裂隙双重介质三维逾渗模型,这一模型的建立使得逾渗理论的研究成果可以被应用到更多的领域中,如煤体、岩体等。基于VC++6.0开发了孔隙裂隙双重介质三维逾渗模拟软件,模拟研究了双重介质的逾渗规律,模拟研究表明:裂隙的存在在很大程度上提高了介质的逾渗概率,使孔隙裂隙双重介质的逾渗规律明显不同于孔隙介质;随孔隙率、裂隙分形维数、裂隙数量分布初值由小到大逐渐增长,必然发生逾渗转变的自然现象。Based on the model of 3D porous medium,the fracture as a very important permeability channel is taken into account in the theoretical research on percolation of medium,the research methods of percolation in 3D porous and fractured double-medium is put forward,and the percolation model of 3D porous and fractured double-medium are established. The model applies to more fields,such as coal bed,rock mass. Based on VC++6.0,the software of 3D is developed,the percolation and the percolation law of 3D porous and fractured double-medium are simulated. The results indicate that fracture in the model increases the value of percolation probability observably. It makes the percolation law of double-medium differ from the law of porous medium. The natural phenomena of percolation transition happens surely with the increase in porosity,fracture fractal dimension and fracture number distribution initial value.

关 键 词：逾渗 孔隙 裂隙 分形 逾渗阈值 双重介质 

分 类 号：O357.3[理学—流体力学]