Hollow grouting mining anchor cable

Abstract

The invention discloses a hollow grouting mining anchor cable. The hollow grouting mining anchor cable comprises a head steel pipe, hollow steel strands, plastic grout stopping pipes, plastic grout stopping pipe outer sleeves, hollow hexagon nuts, grouting openings, hexagon bolts, grouting pipes, grout stopping plugs, supporting plates and mining anchor cable anchorage devices, wherein a pluralityof stranded hollow steel strands are fixed to the right side of the head steel pipe; the outer sides of the hollow steel strands are sleeved with the plastic grout stopping pipes; the outer walls ofthe plastic grout stopping pipes are wrapped with the plastic grout stopping pipe outer sleeves; the hollow hexagon nuts are welded to the right ends of the hollow steel strands; the right end openings of the hollow hexagon nuts are arranged to be the grouting openings; the hexagon bolts are in threaded connection with the grouting openings; the grouting pipes are welded to the left sides of the grouting openings; and the right portions of the hollow steel strands are sleeved with the grout stopping plugs. The hollow grouting mining anchor cable has the beneficial effects of being high in strength, good in plasticity, low in relaxation value, good in straightness, high in wrapping force and integrity with resin anchoring agents and grouting liquid and the like.

Description

technical field [0001] The invention relates to a mine anchor cable, in particular to a hollow grouting mine anchor cable. Background technique [0002] In the coal mining face, roadway supports or single pillars are generally used for advance support. When the roadway is irregularly arranged, if the roadway support is used in advance for support, the roadway support is not easy to withdraw when the working face is combined; For protection, due to the large width (4.2m) and high height (4.3m) of the roadway, when single support is used, the labor intensity of workers is high and the risk factor is high. In view of this, a technology of using hollow grouting anchor cables instead of traditional advance support is proposed. The surface of each steel strand of the anchor cable has a texture, which occupies a certain space. At the same time, other types or processes of grouting anchor cables are used underground. Because the grouting effect is not good, it directly affects the ...

AI Technical Summary

Problems solved by technology

The surface of each steel strand of the anchor cable has a texture, which occupies a certain space. At the same time, other types or processes of grouting anchor cables are used underground. Because the grouting effect is not good, it directly affects the grouting effect after the grout solidifies. The strength and effect cannot be achieved, slowing down the grouting efficiency

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