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作为一种非连续介质,岩体的变形行为与连续介质存在较大差异。以施工期变形监测资料为基础,结合地质和施工资料,对地下厂房的围岩变形特征及其机制进行分析。围岩变形的空间分布受结构面控制作用明显,不论在水平方向、垂直方向,还是在钻孔深度方向,由于结构面的存在变形均可能出现分异现象;邻近洞室开挖对围岩变形的影响较为复杂,距离越近影响越大的一般性规律不一定成立;围岩的变形主要由控制性结构面的“张开位移”构成,“张开位移”占全部变形的84%～92%。围岩的上述变形特征揭示了基于连续介质力学的数值方法的局限性,因此加强离散类数值方法(DDA等)在岩体宏观变形模拟方面的应用研究是一个值得深入探索的课题。
As a kind of discontinuous medium, the deformation behavior of rock mass is different from that of continuous medium. Based on the deformation monitoring data during the construction period, the deformation characteristics and mechanism of the surrounding rock of the underground workshop are analyzed based on the geological and construction data. The spatial distribution of deformation of surrounding rock is obviously controlled by the structural plane. The fractal of the surrounding rock may occur due to the deformation of the structural plane in the horizontal direction, the vertical direction or the depth of drilling. The surrounding rock deformation The general law of the influence of the distance is not necessarily established. The deformation of the surrounding rock is mainly composed of the “open displacement” of the controlled structural plane, and the “open displacement” accounts for the total deformation 84% ~ 92%. The above deformation features of surrounding rock reveal the limitations of numerical methods based on continuum mechanics. Therefore, it is worth exploring in depth that the application of discrete numerical methods (DDA, etc.) to the macroscopic deformation simulation of rock mass.