Grouting anchor cable for coal mine tunnel support

By introducing expandable rubber grout stoppers and annular airbag systems into the grouting anchor cables, the problem of grout leakage caused by borehole gaps was solved, achieving more efficient grouting results and better roadway support quality.

CN224282683UActive Publication Date: 2026-05-26CHANGCUN COAL MINE OF SHANXI LUAN ENVIRONMENTAL PROTECTION ENERGY DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGCUN COAL MINE OF SHANXI LUAN ENVIRONMENTAL PROTECTION ENERGY DEV CO LTD
Filing Date
2025-06-04
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

During the grouting process, the unevenness of the inner wall of the borehole at the end of the existing grouting anchor cable causes gaps between the grout stopper and the inner wall of the borehole, resulting in grout leakage, which affects the grouting effect and the quality of roadway support.

Method used

A grouting anchor cable for coal mine roadway support is designed, which adopts a hollow grouting anchor cable body and is equipped with an expandable rubber grout stop plug, an annular air bladder and an air inflator system. The annular air bladder expands and fills the gap by inflation to prevent grout leakage, and the position of the grout stop plug is adjusted by a screw sleeve to adapt to different drilling conditions.

Benefits of technology

It effectively prevents grout leakage, improves grouting effect and coal mine roadway support quality, and enhances the applicability and flexibility of grouting anchor cables.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224282683U_ABST
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Abstract

The utility model discloses a coal mine tunnel support grouting anchor cable which comprises a grouting anchor cable body, the grouting anchor cable body is hollow, the right end of the grouting anchor cable body is fixedly communicated with a guide head, the guide head is provided with a grout outlet, and the surface of the grouting anchor cable body is movably sleeved with a baffle. By arranging the annular air bag, the inflation pipe, the annular pipe and the valve, when grouting operation needs to be carried out, the annular pipe can be inflated through the communicating pipe at the top of the annular pipe, gas enters the annular air bag in the stop-grouting plug through the communicating pipe to enable the annular air bag to be expanded, and therefore a gap between the stop-grouting plug and the inner wall of a drill hole can be better filled; grout leakage is effectively prevented, and the grouting effect and the coal mine tunnel supporting quality are improved.
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