预应力锚索全长锚固承载特征与解析应用

Bearing Characteristics and Analytical Application of Full Length Anchorage of Prestressed Anchor Cable

针对唐口煤业深井软岩巷道大变形问题,采用理论分析与数值解析的方法分析预应力锚索全长锚固的轴力大小与分布特征。结果表明:锚索轴力呈拱形,有效控制弱面,将浅部卸荷转移到深部;呈现叠加性与分散性,轴力既相互叠加又分散承载。预应力锚索全长锚固提高了支护系统承载性,可在深部复杂巷道支护中推广应用。

In view of the large deformation problem of soft rock roadway in Tangkou Coal Mine,the axial force and distribution characteristics of the full-length anchorage of prestressed anchor cable are analyzed by theoretical analysis and numerical analysis.The results show that the axial force of the anchor cable is arched,the weak surface is effectively controlled,and the shallow unloading is transferred to the deep.The axial forces are superimposed and dispersed,the axial forces are both superimposed and dispersed.The full-length anchoring of prestressed anchor cable improves the bearing capacity of the support system,and can be popularized and applied in the support of deep and complex tunnels.