A pressure yielding internally-grouted anchor cable comprises a hollow internally-grouted cable body, an anchor
cable tray, an anchor cable rigging and a pressure yielding
pipe, the hollow internally-grouted cable body is formed by winding a plurality of steel strands around a hollow rubber grouting core
pipe, a plurality of groups of
grout outlet holes are drilled in the hollow rubber grouting core
pipe at intervals, the plurality of steel strands at the position of every group of
grout outlet hole are processed into a
honeycomb-shaped
grout outlet section, and the
tail portion of the hollow internally-grouted cable body is provided with an anchoring agent mixing head; the pressure yielding pipe is a specially-made steel pipe with the middle portion protruding outwards to form an arc-shaped protrusion, the pressure yielding pipe is sleeved outside the hollow internally-grouted cable body in a penetrating mode and arranged between the anchor
cable tray and the anchor cable rigging, and the yield load of the pressure yielding pipe is smaller that of the cable body steel strands. The pressure yielding internally-grouted anchor cable achieves the integration of deep grouting reinforcement and pressure yielding support
coupling of surrounding rock of roadway, expands the
diffusion range of the grout and enhances the reinforcement function and can
yield pressure timely when under relatively
large deformation pressure of the surrounding rocks to avoid being broken through pulling and to further avoid losing
efficacy, and can effectively improve the stability of deformed surrounding rock of the roadway.