中文摘要：

为研究水对油页岩蠕变规律的影响，以不同含水状态下油页岩三轴压缩蠕变实验数据为依据，对水作用下油页岩蠕变3个阶段各自的力学特征进行了分析。作者认为，在衰减蠕变和稳态蠕变阶段岩石内部损伤程度较小；当岩石处于加速蠕变阶段时，岩石内部不断产生损伤，呈现出明显非线性特征，同时水作用进一步加剧了岩石蠕变损伤程度。本文将非线性损伤演化方程引入到改进的Burgers模型中，将含水率变化引起的蠕变参数的变化引入到方程中，建立了不同含水率下油页岩非线性损伤蠕变模型。采用非线性最小二乘法反演蠕变参数，将蠕变方程计算结果与实验结果进行拟合，效果良好。

英文摘要：

In order to study the effect of water on creep of oil shale, mechanical characteristics of oil shale on three different creep stages due to water action were analyzed, based on experimental data of oil shale subjected to triaxial compression under different hydrous conditions. Results show that the rock internal damage is small on both decaying creep stage and steady creep stage~ while on accelerated creep stage, rock unceasingly produces internal damage and presents obvious nonlinear characteristics~ at the same time rock creep damage is further exacerbated bY water action. Iff this paper, by introducing nonlinear damage evolution equation into the improved Burgers model, and introducing the change of creep parameter caused by the change of water ratio into the equation, finally, nonlinear creep damage model of oil shale in different hydrous states is established. Adopting nonlinear least squares inversion creep parameters, the calculated and experimental results of creep equation were well fitted.