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中文摘要：
对层状盐岩体内的油（气）储存硐室进行稳定性计算时,如何选用恰当的本构模型来反映层状盐岩体的特点是至关重要的。针对我国大多数盐矿为多层盐岩的地质构造特征,基于宏观平均意义下的考虑细观弯曲效应的三维Cosserat介质扩展本构模型,结合FLAC^3D软件的主要计算思路,使用VC＋＋平台开发了该模型的FLAC3D接口程序,并编译成动态链接库DLL文件。经算例验证,该程序的计算结果可靠,不仅可以考虑不同力学特性的岩层先后破坏引起复合体单元的渐进损伤破坏,而且引入了夹层体积含量等统计参数后可大大节省单元网格数量,为大型层状岩体内的地下硐室稳定性数值模拟计算奠定了基础。
英文摘要：
For stability analysis of underground oil/gas storages in laminated salt rocks, it is of paramount importance how to select the appropriate constitutive model for the characteristics of laminated salt rocks. In consideration of the laminative geological structural character of most salt mines in China, a new user-defined FLAC^3D interface program is developed using the Visual C＋＋ flat on the basis of 3-D expanded Cosserat medium constitutive model that takes the mesotropic bending effect into account in the sense of macro average; and in the meantime, a dynamic link library（DLL） is compiled in connection with the main calculation methods of FLAC^3D software. A simple tunnel example shows that the calculating results using the present model are reliable. Furthermore, the new model can describe the progressive damage failure of compound element composited by two layers with different mechanical characters, and can also reduce greatly the number of element meshes through introducing some statistic parameters such as volume percent. The present model embedded in FLAC3D is expected to lay a foundation for stability analysis of the underground openings in layered rocks.
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