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完整性好的块状结构岩体 ,岩石本身坚硬、压缩性小、强度高 ,岩体的变形和稳定问题由切割岩体的软弱结构面的压缩和剪切产生 .三维裂隙单元法基于这一认识 ,假定岩体由完整的岩块和切割岩体的软弱结构面组成 ,岩块由各种软弱结构面包围 .在岩体总的变形量中 ,岩块本身的压缩量很小 ,假设可以忽略不计 .岩体的压缩和位移假设完全由结构面的压缩和结构面两侧岩体滑移引起 ;岩块本身的强度认为是无穷大 ,剪切只能沿软弱结构面发生 .本文在上述假设的基础上推导了三维状态下的岩体受力和变形计算公式 ,并列出了矩阵形式的控制方程 ,用于数值计算分析
The integrity of the rock mass is massive, the rock itself is hard, the compressibility is small, the strength is high, the deformation and stability problems of the rock mass are caused by the compression and shearing of the weak structural plane of the cutting rock mass.The 3D fracture cell method is based on this It is assumed that the rock mass is composed of the intact rock mass and the weak structural plane of the cutting rock mass, and the rock mass is surrounded by various weak structural planes. In the total deformation of the rock mass, the compressibility of the rock mass itself is small, Negligible.The compression and displacement of rock mass are assumed to be caused entirely by the compression of the structural plane and the slip of the rock mass on both sides of the structural plane.The strength of the rock mass itself is considered to be infinite and the shear can only occur along the weak structural plane.In this paper, Based on the deduced three-dimensional state of rock mass force and deformation formula, and lists the matrix form of control equations for numerical analysis