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岩体是岩石块体和分割这些块体的边界的组合体。沿边界面(结构面)的局部剪切变形使得位移场产生间断,对岩体的力学性能产生巨大的影响。采用光滑函数组合来描述滑移面上的间断,得到反映岩体沿着边界局部剪切的数学模型。利用此局部剪切模型得出了应力–滑移关系具有强化阶段时圆形坑道围岩自身承载能力的解析表达式,研究了岩体滑移面对坑道围岩自身承载能力的影响。通过分析得到,自承能力在深部坑道围岩的稳定中发挥了重要作用,应力–滑移关系的强化段对围岩承载力有着很大的影响;围岩压力与坑道的埋深、坑道的尺寸以及围岩的物理力学性质等具有直接关系;围岩出现不稳定的动力现象(岩爆)与此岩体参数m关系极大,而岩体参数与接触面的软化程度、能量转移、耗散结构的几何尺寸以及弹性模量有关。
Rock mass is a combination of a rock mass and a boundary that divides the mass. The local shear deformation along the boundary surface (structural plane) causes discontinuity in the displacement field and has a huge impact on the mechanical properties of the rock mass. The combination of smooth functions is used to describe the discontinuity on the slip surface, and the mathematical model reflecting the local shearing along the boundary of the rock mass is obtained. By using this local shear model, an analytical expression of the bearing capacity of surrounding rock of round tunnel with stress-slip relationship is obtained, and the influence of the slip surface of rock mass on the bearing capacity of surrounding rock of tunnel is studied. Through analysis, the self-bearing ability plays an important role in the stability of surrounding rock in deep tunnel. The reinforced section of stress-slip relationship has a great influence on the bearing capacity of surrounding rock. The pressure of surrounding rock and the depth of tunnel, Size and the physical and mechanical properties of the surrounding rock have a direct relationship; instability of the surrounding rock dynamic phenomenon (rock burst) and the rock parameters m great relationship between the rock parameters and contact surface softening degree, energy transfer, consumption The geometry of the bulk structure and the elastic modulus.