Hole wall grouting anchor cable

A technology for grouting anchor cables and anchor cables, applied in the field of anchor cables, can solve the problems of reducing the breaking force of the anchor cables, reducing the anchoring performance and supporting performance of the anchor cables, and the length of the grouting pipeline, so as to improve the supporting strength or The effect of breaking force, stable and reliable anchoring quality, and smooth grouting channel
CN102748048AInactive Publication Date: 2012-10-24ANHUI PROVINCE COAL SCI RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ANHUI PROVINCE COAL SCI RES INST
Publication Date
2012-10-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a hole wall grouting anchor cable which is characterized in that an L-shaped grouting hole is formed in an anchor cable supporting plate and on the periphery of a steel strand mounting hole, wherein one end of the grouting hole is communicated with an anchor cable hole in the anchor cable supporting plate and is communicated with an annular grouting cavity between a steel strand and a hole drilling wall through the anchor cable hole, and the other end of the grouting hole is located on the surface of the anchor cable supporting plate and is connected with an external grouting pipe; a hole pipe located in a drilled hole is connected with the anchor cable supporting plate; and a groove is turned on the periphery of the hole pipe and is internally provided with a hole wall sealing ring. The hole wall grouting anchor cable disclosed by the invention can effectively improve the grout anchoring strength of an anchor cable and reduces the manufacturing cost of the anchor cable.
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Description

technical field

[0001] The invention relates to an anchor cable, which is applied to the supporting of coal mine shafts. Background technique

[0002] Coal mine roadway support anchor cable is composed of steel strand, resin anchoring agent anchoring section, steel strand free section, orifice backing plate and anchorage. The steel strand is anchored deep in the surrounding rock of the roadway through the resin anchoring agent. Anchor cable supporting plate and tension gauge etc. apply pre-tightening force to the anchor cable. The anchor cable transfers the surrounding rock pressure of the roadway to the depth of the surrounding rock through the steel strand to support the roadway.

[0003] At present, most of the anchor cables used in my country's coal mines are small-aperture resin-anchored prestressed anchor cables. This anchor cable anchoring technology has the following problems, which directly affect or reduce the anchoring performance and support performance of the ...

Claims

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