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在具有孔隙压力系统的岩石三轴蠕变仪上,对泥岩进行了考虑孔隙压力作用的三轴蠕变实验.实验中不仅考虑了轴压1σ和围压σ3对蠕变的影响,而且考虑了孔隙压力p在泥岩蠕变过程中产生的重要影响.通过不同应力水平下的蠕变实验,对比含孔隙压力和不含孔隙压力的蠕变实验曲线,表明当轴压σ1和围压σ3一定时,随着孔隙压力p的增加,蠕变变形量将会减小,在稳态蠕变阶段的应变率也会减小,在一定程度上会延长蠕变三个阶段的蠕变时间.并采用经典蠕变模型对实验结果进行分析.
In the rock triaxial creep with pore pressure system, the triaxial creep experiment considering the pore pressure was performed on the mudstone. The effects of the axial compression σσ3 and the confining pressure σ3 on the creep were considered in the experiment, Pore pressure p in mudstone creep process has an important impact through different levels of stress creep test, compared with pore pressure and pore pressure-free creep experimental curves show that when the axial pressure σ1 and confining pressure σ3 certain , With the increase of pore pressure p, the creep deformation will decrease and the strain rate will decrease during the steady-state creep stage, which will extend the creep time of the three stages of creep to a certain extent. The classical creep model analyzes the experimental results.