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为了建立一种符合锚喷支护围岩稳定性分析和支护参数总体评价的简化等效计算方法,应用复合材料力学的基本原理,建立了加锚岩体的复合材料力学模型。首先将锚杆和砂浆视为弹性体,推导了锚杆-砂浆复合体等效力学模型的弹性参数;然后将岩体和锚杆-砂浆复合体视为复合增强材料,建立了横观各向同性体模型,并推导了该等效力学模型相应参数的确定公式。在此基础上依据工程实例,分别进行了复合后巷道模型与常规离散巷道模型的数值模拟研究;通过对巷道两帮、顶、底部位移和围岩应力的对比分析,验证了该等效方法的可行性和适用性。
In order to establish a simplified equivalent calculation method which is in accordance with the stability analysis of anchor and shotcrete supporting rock and the general evaluation of supporting parameters, the mechanical model of composite material with anchored rock mass is established by applying the basic principle of composite mechanics. Firstly, the anchor rod and the mortar are considered as the elastic body, and the elastic parameters of the equivalent mechanical model of the anchor-mortar composite body are deduced. Then the rock mass and the anchor-mortar composite body are regarded as the composite reinforcement materials, Same-body model, and derive the equivalent mechanics model of the corresponding parameters of the formula. On this basis, according to the engineering example, the numerical simulation study of the composite laneway model and the conventional discrete laneway model are respectively carried out. By comparing and analyzing the displacement of two sides, the top and bottom of roadway and the surrounding rock stress, Feasibility and suitability.