关键词: 预应力锚索, 全长锚固, 轴向附加应力, 抗剪性能

Abstract: For the reinforcement of surrounding rock of roadway with fully encapsulated cables, Anchorage and failure mechanisms with the two aspects are analyzed and studied in two stages: the axial additional stress of the surrounding rock mass and the shearing resistance of the weak surface such as joint in the end anchoring stage; The axial additional stress of the surrounding rock mass and the shear resistance of the joint weak surface during the fully encapsulated stage. The following conclusions can be drawn: 1. Pre-stressed full-length anchoring can transfer the shallow surrounding rock stress to the deep part by prestressing; 2. Pre-stressed fully encapsulated cables improves the targeting of support rigidity and resistance; The anchor has decoupled energy absorbing flexible support performance. The prestressed fully encapsulated cables is better than the anchor cable, and the support performance is greatly improved. The technology has been successfully applied in the Huainan mining area, and significant technical and economic benefits have been achieved.