Large-deformation impedance-lifting anti-shearing anchor cable and construction method and working method thereof

Abstract

The invention discloses a large-deformation impedance-lifting anti-shearing anchor cable and a construction method and working method thereof, and is applicable to underground engineering. The large-deformation impedance-lifting anti-shearing anchor cable comprises an anchor cable body, an energy absorption column is arranged at the tail end of the anchor cable body, an anti-shearing sleeve is arranged on the outer side of the energy absorption column through an anti-deviation device, thus the energy absorption column is axially arranged in the anti-shearing sleeve, a ribbed tray is fixed to the tail of the anti-shearing sleeve, and the front end of the anti-shearing sleeve is connected with a conical-structure limiting plate matched with the anchor cable body through threads; the anti-shearing sleeve is a hollow cylindrical pipe, the front end of the energy absorption column abuts against the interior of the limiting plate, an anti-impact baffle is arranged at the tail of the anti-shearing sleeve, and a rubber gasket is arranged on the inner side of the anti-impact baffle; and the energy absorption column is formed by connecting a plurality of deformable energy absorption pipes with different deformation starting pressures end to end. The large-deformation impedance-lifting anti-shearing anchor cable is large in allowable deformation, not prone to being damaged by shearing, good in anti-impact effect and adjustable in yielding distance, and a cable body is not exposed to occupy the roadway space.

Description

technical field [0001] The invention relates to a large-deformation rising impedance shearing anchor cable and its construction method and working method, and is especially suitable for a large deformation rising impedance shearing anchor cable and its construction method used in coal mines, metal mines, tunnels and other underground projects and working methods. Background technique [0002] Anchor cables are important supporting materials in underground engineering, mining engineering, slope engineering and other fields. With the increasingly complex conditions of resource exploitation, the pressure and deformation of the surrounding rock of the roadway increase significantly. The ordinary anchor cable support cannot meet the stability control requirements of the high-stress and large-deformation roadway, and it is prone to breakage and even induces roof fall accidents. Most of the existing deformable anchor cables are deformed through friction energy absorption and extru...

AI Technical Summary

Problems solved by technology

With the increasingly complex conditions of resource exploitation, the pressure and deformation of the surrounding rock of the roadway increase significantly. The ordinary anchor cable support cannot meet the stability control requirements of the high-stress and large-deformation roadway, and it is prone to breakage and even induces roof fall accidents.

Most of the existing deformable anchor cables are deformed through friction energy absorption and extrusion energy absorption, which have some disadvantages: first, the tail of the anchor cable is exposed, occupying the roadway space; second, the structure is complex, inconvenient to process, high cost, and construction time long; the third anchor cable has limited yield and deformation capacity, and cannot effectively control the deformation of the surrounding rock; the fourth is unable to resist shearing, and when the surrounding rock is dislocated, the anchor cable is easy to shear and break; the fifth is not recyclable and cannot be repeated Utilization, resulting in increased costs; Sixth, it cannot prevent ejection, and when the anchor cable deforms and breaks, it is easy to cause ejection and injury accidents; Seventh, it does not have the characteristics of reflecting the deformation of the roadway surrounding rock and the force of the anchor cable itself

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