采用三维离散元程序3DEC 5.00建立节理岩体模型,并利用Fluid模块进行渗流-应力耦合分析。研究表明:岩体在单侧水压和覆岩压力下,节理内孔隙压力沿程线性衰减,并使节理面应力状态由稳定区向破坏区迁移;岩体沿节理面从孔隙压力最高处开始发生剪切破坏,并向孔隙压力最低处发展;在剪切破坏发展方向上,节理面不断出现新的剪应力集中与瞬间剪切破坏,残余剪应力τr=(正应力σn-孔隙压力p)×摩擦系数tanφ The three-dimensional discrete element program 3DEC 5.00 is used to establish the jointed rock mass model, and the Fluid module is used to analyze the seepage-stress coupling. The results show that under the condition of unilateral water pressure and overburden pressure, the rock mass attenuates linearly along the pore pressure along the joint, and the stress state of the joint surface migrates from the stable area to the damaged area. The rock mass begins along the joint surface from the highest pore pressure Shear stress and shear stress, and develop to the lowest pore pressure. In the development direction of shear failure, new shear stress concentration and instantaneous shear failure continue to appear in the joint surface. The residual shear stress τr = (normal stress σn-pore pressure p) × Coefficient of friction tan φ