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以锚固体围岩为研究对象,采用数值模拟方法,分析了锚杆支护的作用机理,建立了相应的数值模型,探讨了不同锚固段长度情况下,围岩应力场的分布及变化规律,考察了垂直应力σz和等效应力σepv随锚固长度b的变化以及围岩水平面内有围压作用时的锚杆支护效果。
Taking the surrounding rock of anchorage as the research object, the numerical simulation method is used to analyze the action mechanism of the rock bolt support, and the corresponding numerical model is established. The distribution and variation regularity of stress field of surrounding rock under different anchorage length are discussed. The variation of vertical stress σz and equivalent stress σepv with the anchorage length b and the effect of bolt supporting when confining pressure is applied in the surrounding rock are investigated.