针对脆性材料颗粒破碎的三维力学问题,从细观力学角度,以颗粒极限拉应力作为颗粒破碎的判别标准,进行了考虑颗粒破碎的堆石料大三轴排水剪试验的数值模拟,直观揭示了堆石料在三轴应力状态下的变形过程和细观机理。结果表明,基于颗粒流方法的数值模拟可再现堆石料室内试验的应力—应变及体变曲线、围压依赖性、剪胀性及结构变化等。 Aiming at the three-dimensional mechanical problems of fragmentation of brittle materials, the numerical simulation of large-scale triaxial shear tests of rockfill materials considering particle crushing is carried out by using the ultimate tensile stress of particles as the criterion of particle crushing from the perspective of mesomechanics. Deformation process and meso-mechanism of stone under triaxial stress state. The results show that the numerical simulation based on particle flow method can reproduce the stress-strain and volume change curves, confining pressure dependence, dilatancy and structural changes of indoor tests of rockfill materials.