中文摘要：

为研究块石胶结充填体的失稳方式，对其进行了单轴压缩试验。结果表明：块石胶结充填体根据失稳方式可分为滑移式失稳和张开式失稳。运用基于细现颗粒流理论的PFC程序对块石胶结充填体模型进行蠕变模拟研究，结果表明：模型内部的块石在分级恒载作用下或多或少都会产生移动；灰砂比会影响块石胶结充填体内部块石的位移，从而影响块石胶结充填体的蠕变破坏过程。在模拟结果的基础上，建立了非定常蠕变模型，以更好地描述块石胶结充填体的整个蠕变过程。

英文摘要：

In order to study the failure of rocky cemented filling body, uniaxial compression tests were carried out. The results showed that the failure types can be divided into tensor failure and shear failure. The creep simulation and study of filling body models were conducted by PFC program on the basic of particle flow theory. The results indicated that the stones inside the models would have more or less dis placement under graded load. And the cement-sand ratio can affect the displacement, so as to influence the creep failure process. Based on the simulation results, an unsteady creep model was established to better describe the whole creep characteristics of rocky cemented filling body.