Solid anchor rod capable of being grouted

Abstract

The invention discloses a solid anchor rod capable of being grouted, and belongs to the technical field of coal mine roadway supporting. The solid anchor rod comprises a solid anchor rod body and an auxiliary grouting and hole sealing mechanism. The solid anchor rod body comprises a rod body, a tray and an anchorage device. The rod body is a ribbed bar, and one end of the rod body is fixedly sleeved with a limiting check ring. The tray is a grouting base plate. The auxiliary grouting and hole sealing mechanism comprises a grouting guide pipe, a thin-wall steel pipe, a sealing pipe and a sealing ring. During use, a resin anchoring section of part of the length of the rod body in a drilled hole is firstly completed firstly; and then a cement grout anchoring section of part of the length of the rod body in the drilled hole is completed through the grouting base plate and the auxiliary grouting and hole sealing mechanism. According to the solid anchor rod, grouting is carried out through an annular channel between the anchor rod body and the drilled hole, and it is guaranteed that the grouting channel is smooth; and meanwhile the problem of hole sealing of grouting is solved, the slurry with high solidification strength can be fast inject-grouted, and the overall anchoring strength of the solid anchor rod is improved. According to the solid anchor rod, the cost is reduced, the anchoring and grouting integration requirement is met, and the work efficiency is improved.

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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