摘要
在对人工充填砂裂隙进行剪切实验的基础上,分析了剪应力和法向有效应力作用下裂隙岩石的渗流特性,并提出了二维应力作用下裂隙岩石渗流模型,即剪应力和法向有效应力耦合作用下的渗流公式。
A new laboratory apparatus for coupled shear-flow of jointed rock was developed and used to investigate the coupled characteristic of a single rock fracture under shear and normal effective stresses. Based on shearing test of jointed marble sample under constant normal loads,the relationships among normal stress,shear stress,water pressure and flow quantity are presented, and the seepage charactristic of jointed rock is analysed. The relation equation between flow quantity and shear stress is deduced to fit the curves of testing data. By using an approximate regression equation,the relationship between the hydraulic conductivity and shear stress is estabilished eventually. The testing results reveal that the hydaulic conductivity of a sand-filled joint is reduced slightly with increasing shear stress,and the relationship between hydraulic conductivity and shear stress is linear approximately.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第8期1194-1198,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(19872070)。
