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考虑泥岩夹层和盐岩的弹性性质和稳态蠕变性质,通过数值试验方法计算层状复合盐岩体在单轴和低围压三轴荷载作用下蠕变变形过程中力学相互作用和变形时效规律,分析泥岩夹层和盐岩层因蠕变率不匹配对层状盐岩蠕变的影响,初步讨论了层状复合岩体的复合材料研究方法。结果表明,层状盐岩中泥岩夹层与盐岩因弹性参数不匹配产生的初始应力集中在蠕变过程中发生松弛,因泥岩夹层与盐岩层蠕变率不匹配导致两者之间应力重分布,泥岩夹层对盐岩层的蠕变有明显抑制作用。这些分析体现了层状盐岩蠕变过程的非线性性质,为建立层状盐岩体合理本构模型奠定了基础。
Taking into account the elastic properties and steady-state creep properties of mudstone intercalation and salt rock, the mechanical interaction and deformation aging of layered composite salt rock mass under uniaxial and low confining pressure triaxial loading are calculated by numerical test Regularity, the influence of the mismatch of mudstone interlayer and salt rock layer on the creep of layered rock salt was analyzed, and the composite material research method of layered composite rock mass was discussed. The results show that the initial stress concentration caused by the mismatch of mudstone interlayer and salt rock in layered salt rock is relaxed during the creep process. The stress redistribution caused by the mismatch of creep rate between mudstone interlayer and salt rock layer , Mudstone interlayer can significantly inhibit the creep of salt rock. These analyzes show the nonlinear nature of the creep process of layered rock salt, which lays the foundation for establishing a reasonable constitutive model of layered rock salt rock mass.