中文摘要：

深部岩体具有典型的不均匀、不连续的自应力块系等级构造结构。由于浅部巷道围岩应力场分析是基于连续介质力学理论，没有考虑岩体的块体特性，因而无法应用于深部巷道块系围岩的应力场分析。考虑到深部巷道块系围岩破坏类型主要表现为峰后岩块沿软弱接触面的剪切滑移破坏，通过建立深部巷道的平面应变块系围岩模型，得到了轴对称条件下岩块相互作用的解析解；分别假设岩块之间的接触满足刚塑性和Mohr-Coulomb屈服条件，推导得出上述两种屈服条件下的块系围岩模型和连续介质模型的围岩支护力的计算公式。对比分析表明：围岩块体构造特性对深部巷道施工和承载力设计计算有重要的影响；通过假设块体间剪应力与剪切滑移满足分段线性关系，得到了块系围岩径向位移，剪应力和剪切滑移量的解析表达式，引入无量纲化的深部巷道块系围岩稳定性参数五，并得出当五〈1时块系围岩是稳定的，当名〉1时块系围岩是不稳定的。

英文摘要：

Deep rock mass has a typical inhomogeneous and discontinuous self-stressed block-hierarchical structure. Without considering the blocky characteristics of deep rock mass, the classical continuum theory fails to analyze the stress field of the block rock mass around deep tunnels. The failure mode of the deep block rock mass around deep tunnels is the shear slip along weak contact surfaces between rock blocks. The plane strain model of block rock mass around a deep tunnel is established. The analytical expressions of interaction between rock blocks on the contact surface are obtained in the axial symmetric problem. The supporting forces of deep tunnels are obtained by assuming that the weak contact satisfies the rigid-plastic and Mohr-Coulomb constitutive relationships respectively. Through comparison of the calculated results based on the block rock mass model and the continuum rock mass model, the necessity of the consideration of the blocky characteristics in the construction and theoretical analysis of deep tunnels is validated. The radial displacement, shear stress and shear slip are obtained by supposing that the shear stress and the shear slip of contact satisfy the piecewise-linear relationship. The dimensionless stability parameter 2 of block rock mass around deep tunnels is defined, the block rock mass around deep tunnels is stable when 2 〈 1, and when 2 〉 1, the surrounding block rock mass is unstable.