Novel combined stop-grouting plug used for anchor rod and anchor cable

Abstract

The invention provides a novel combined stop-grouting plug used for an anchor rod and an anchor cable. The novel combined stop-grouting plug is mainly used for preventing grout from overflowing duringgrouting of the anchor rod and the anchor cable of a coal mine tunnel. The combined stop-grouting plug is composed of an end-surface stop-grouting plug body and a central stop-grouting plug body, theend-surface stop-grouting plug body and the central stop-grouting plug body are both made of elastic materials, the outer walls of the end-surface stop-grouting plug body and the central stop-grouting plug body are both tapered, and the small-diameter end of the end-surface stop-grouting plug body is connected with the large-diameter end of the central stop-grouting plug body. A tapered lip partwhich is folded to the small-diameter end is arranged at the large-diameter end of the end-surface stop-grouting plug body, a first inner hole and a second inner hole which are used for allowing the anchor rod or the anchor cable to be inserted are formed in the end-surface stop-grouting plug body and the central stop-grouting plug body respectively, and the second inner hole is tightly matched with the outer wall of the anchor rod or the anchor cable. The novel combined stop-grouting plug is simple in structure, economical and practical, convenient to use, sealed and reliable, and especially,the technical problems are solved that grout overflowing and grout leakage are likely to happen during high-pressure grouting so that pressure grouting cannot reach a preset pressure, and even the grouting operation is difficult to conduct because of grout leakage.

Description

technical field [0001] The invention relates to a grout stop device used in grouting operations for anchor rods and anchor cables, in particular to a novel combined grout stop plug for anchor rods and anchor cables. Background technique [0002] Anchor rod and anchor cable support have become one of the main support methods for coal mine underground roadways. Complicated geological conditions such as weak surrounding rock, fault fracture zone, high stress and large deformation commonly exist in coal mine underground roadways, which bring great difficulties to roadway control, and the support effect of ordinary bolts is relatively poor. The use of hollow grouting bolts and anchor cables for full anchor support can strengthen the broken surrounding rock, integrate anchoring and grouting, change the loose structure of the surrounding rock, improve the cohesive force and internal friction angle, seal the cracks, and prevent water The erosion of the rock mass significantly impro...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new type of combined grout stopper for anchor rods and anchor cables, which is simple in structure, economical and practical, easy to use, and reliable in sealing, and can fundamentally solve the problems existing in existing grout stoppers. The sealing effect is poor, especially in high-pressure grouting, it is easy to overflow and leak grout, so that the grouting under pressure cannot reach the predetermined pressure, and even the technical problem of grouting operation is difficult due to grout leakage

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