Recoverable anchor rod for drilling, anchoring and grouting and supporting method thereof

Abstract

The invention relates to a recoverable anchor rod for drilling, anchoring and grouting and a supporting method thereof. The anchor rod comprises a hollow grouting rod body, a nut, a gasket, a tray and a hollow threaded rod body. A drill bit is arranged at the front end of the hollow threaded rod body, and the hollow threaded rod body is provided with multi-purpose holes; the hollow grouting rod body advances inwards through threads, metal nails welded to the internal surface of the front end of the hollow grouting rod body pierce an anchoring agent package inside the hollow threaded rod body, and then, an anchoring agent is mixed and is then discharged through the holes, so as to play an anchoring role; the hollow grouting rod body is used for grouting, and slurry is exported through the multi-purpose holes, so as to cement and solidify loose coal rock bodies; and the hollow threaded rod body is snapped with the wall of a drilled hole through threads on the external surface of the hollow threaded rod body, so as to strengthen an anchoring role in end parts. The one-time drilling, anchoring and grouting supporting of loose coal rocks is realized through tightening and tensioning the tail of the hollow anchor rod, so that the difficult problem that the anchor rod dose not easily enter the loose coal and rocks caused by the fact that the loose coal rocks are subjected to hole collapsing after the loose coal and rocks are subjected to drilling is solved, the load capacity of a coal body is increased, and the supporting strength for surrounding rock of a roadway is enhanced. The recoverable anchor rod for drilling, anchoring and grouting and the supporting method thereof have the advantages of simple structure, low cost, little waste, easiness in construction, and good supporting effect.

Description

technical field [0001] The invention relates to a mine support bolt, in particular to a recyclable bolt and support method for drilling, anchoring and injecting, and is especially suitable for loose and broken surrounding rocks, extremely soft rock formations, and high-stress crushing in mines, tunnels, and underground projects. Drilling, anchoring and grouting support for surrounding rock and large mining depth coal roadway. Background technique [0002] Bolt support is to strengthen the surrounding rock by installing bolts in the surrounding rock, improve the bearing capacity of the surrounding rock, and form an anchor to support the roof. Usually, the bolt is anchored with resin anchoring agent in the innermost section of the surrounding rock, but when the bolt is drilled in some loose and broken surrounding rock, extremely soft rock formation, high-stress broken surrounding rock and large mining depth coal roadway, due to Loose surrounding rock, broken, high stress and...

AI Technical Summary

Problems solved by technology

Therefore, the construction is complicated and the support cost is high. Since the surrounding rock pressure and deformation of the roadway are large when the roadway is just excavated, if the current anchor is used for direct support, the grouting anchor will easily fail when the surrounding rock deforms.

In addition, there is a very common problem with the anchor rods in the prior art. After the anchor rods are used, they cannot be recycled because they are anchored in the surrounding rock. The resulting problems are high support costs and a large waste of resources.

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