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为分析锚固体力学效应及端锚预应力锚杆作用范围,并用以优化支护参数,提供施工指导.在挤压加固理论的基础上,利用弹性力学分析方法,建立端锚预应力锚杆锚固范围计算模型.借助Mathematic数学处理软件求得锚固范围方程.在Matlab基础上分析锚固范围方程特性,得出锚固范围与有效锚固长度和有效预应力的关系.研究表明:锚固范围随有效锚固长度和有效预应力的增加而增大;在目前矿山常用有效锚固长度和有效预应力下,最优锚固间距位于0.6～1.4m之间;锚固外区呈锥体状,锥体底面直径为最优锚杆间距,锥体高为有效锚固长度的10%,锥体底边角在7°～29°之间.将锚固范围方程应用于新城金矿的预控顶支护,得到预控顶预应力树脂锚杆锚固范围,求得最优锚杆支护间距1.2m,支护百分比79.3%,锚固外区锥体高0.19m,底边角17.6°.
In order to analyze the mechanics effect of anchor and the range of anchor prestressed anchor, and to optimize the support parameters, provide construction guidance.On the basis of the theory of extrusion and reinforcement, Range calculation model.With Mathematic mathematical processing software, the equation of the range of anchorage is obtained.The characteristic of the range of anchorage equation is analyzed based on Matlab, and the relationship between the range of anchorage and the effective anchorage length and the effective prestress is obtained.The results show that the range of anchorage range varies with the effective anchorage length and Effective prestress increases and increases; the effective anchor length and effective prestress commonly used in the mine, the optimal anchor spacing is located between 0.6 ~ 1.4m; Anchored outer area was cone-shaped, cone bottom diameter of the optimal anchor The distance between the rods is 10% of the effective anchorage length and the cone bottom angle is between 7 ° and 29 °. Applying the anchorage range equation to the pre-control top support of Xincheng Gold Mine, Anchor bolt anchorage range, find the optimal bolt support spacing 1.2m, support percentage of 79.3%, anchorage outer cone height 0.19m, the bottom corner of 17.6 °.