A groutable solid anchor rod

Abstract

The invention discloses a groutable solid bolt and belongs to the technical field of coal mine roadway support. It includes a solid anchor rod and an auxiliary grouting sealing mechanism; the solid anchor rod includes a rod body, a tray and an anchor; the rod body is a ribbed steel bar, and one end of the rod body is fixedly sleeved with a limit stop ring; the tray is a grouting pad plate; the auxiliary grouting sealing mechanism includes a grouting conduit, a thin-walled steel pipe, a sealing pipe and a sealing ring. When in use, the resin anchoring section of the length of the rod body in the drilled hole is completed first; and then the cement slurry anchoring section of the rod body in the drilled hole is completed through the grouting backing plate and the auxiliary grouting sealing mechanism. The invention realizes the grouting by using the annular channel between the anchor rod body and the drill hole, ensures the smooth flow of the grouting channel, solves the hole sealing problem of the grouting at the same time, can quickly press and inject the grout with higher solidification strength, and improves the quality of the solid anchor. The overall anchorage strength of the rod. The invention reduces the cost, satisfies the requirement of anchoring and grouting integration, and improves the working efficiency.

Description

technical field [0001] The invention belongs to the technical field of coal mine roadway support, and in particular relates to a solid bolt capable of grouting. Background technique [0002] At present, most of the bolts used in my country's coal mines are small-aperture prestressed resin anchor bolts, and their basic structure is composed of steel bars, resin anchoring agents, trays and anchors. At the place, the pre-tightening force is applied to the anchor rod through the tensiometer, pallet, anchorage, etc., to control the expansion and deformation of the surrounding rock in the anchorage area, such as layer separation, sliding, crack opening, and new crack generation, so that the surrounding rock is in a compressed state. Achieve the effect of supporting the roadway and keeping the roadway stable. [0003] With the continuous development of my country's coal mining industry, coal mining conditions have become more complex, this traditional bolt anchoring technology also ...

AI Technical Summary

Problems solved by technology

The hollow grouting anchor overcomes the shortcomings of the existing anchor to a certain extent, but the hollow anchor also has the following defects: 1. The strength of the anchor is low, and the hollow rod body is used, which seriously reduces the breaking force of the anchor

2. The grouting pressure is low and the grouting effect cannot be achieved. Due to the use of extrusion sealing, the grouting pressure cannot be too high, and the length and quality of the sealing hole are limited to a certain extent, which affects the effect of anchoring and grouting

3. The cost of hollow grouting anchor is higher

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