Study On Effect Of Seepage Flow To Creep Of Deep Soft Rock

More and more engineering (such as water-electrolyte engineering, mine, nucleus flotsam and solute moving) are build on or in rock mass, then the problems of ground water which plays an important role of the engineering security, are putting in front of us. In deep underground rock mass, the rock configuration and mechanics performance are deterioratng form seepage flow so that the safe work is threated seriously. Therefore, it has the important theory significance and the application value to study on mechanical behavior of soft rock in the effect of seepage flow.This article is based on three universal principles, the law of conservation of mass, the line momentum balance principle and the law of conservation of energy. According to three fundamental equations, conservation equation of mass, line momentum balance equation (equation of motion) and energy-conservation equation as well as corresponding seepage fix answer of boundary condition deduced an intergrated mathematical model of fluid-structure coupling of one-phase fluid flowing in porous media of creep deformation.In base of theory research to the rheological model of the predecessor, building a rheological model which not only to illustrate the influence of horizontal loading, but also to show the creep deformation of accelerating phase, at the same time, the traditional model of porous medium was to be improved, and the factor of seepage flow was to be draw into, a model of porous medium that considering factor of seepage was to be built, which has been had application in soft rock, at last we got the creep model of soft rock in deep part of underground that considering the seepage flow.By means of homotaxial experiments of creep that considering seepage flow, the discipline of seepage flow effecting on characteristic of creep of soft rock was got, and further obtains the conclusion that the soft rock bearing capacity and the elasticity coefficient all reduce along with the flow intensity increasing, the instantaneous elastic deformation and the limit of creep deformation increases along with the flow intensity increasing.The example of engineering was simulated by ANSYS, the bottom drum phenomenon was presented visually, the conclusion of assay was verified again.