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Ultralong hollow spiral grouting anchor rod connection piece

A technology for grouting bolts and connectors, which is applied in the installation of bolts, mining equipment, and earth-moving drilling, etc., can solve problems such as the length limit of bolts, and achieve the effect of high reliability and strength.

Inactive Publication Date: 2013-02-20
张延策
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] In the soft coal seam roadway support in my country, grouting treatment is required to strengthen the surrounding rock strength of the coal roadway, and some coal roadways require deep grouting treatment, but when supporting in deeper and softer coal seams, it often takes a long time Due to the constraints of production and transportation, the length of the anchor has a certain limit. Therefore, it is urgent to develop a connecting piece for the connection of the anchor

Method used

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  • Ultralong hollow spiral grouting anchor rod connection piece

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Embodiment Construction

[0009] As shown in the figure, the front end rod body 1 of the anchor rod is welded to the front end connector 2, and the tail end anchor rod body 3 is welded to the end end connector 4, and the center of the front end connector 1 and the end end connector 3 are drilled with a grouting hole 5. An overflow hole 6 is left at the end of the rod body 4 at the tail end of the anchor rod.

[0010] When in use, the two connecting pieces are installed together through a threaded connection to form an ultra-long grouting bolt, and then installed in the coal tunnel anchor hole, and the ultra-long bolt high-pressure grouting operation can be implemented after sealing.

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Abstract

The invention provides an ultralong hollow spiral grouting anchor rod connection piece which is used for connecting anchor rods of ultralong supports. A front end anchor rod body and a front end connection piece are welded, a tail end anchor rod body and a tail end connection piece are welded, a grouting hole is respectively drilled at the centers of the front end connection piece and the tail end connection piece, and a grout vent hole is reserved at the tail end of the tail end anchor rod body. The connection piece is high and reliable in strength, high pressure grout can smoothly flow through the grout vent hole, and a spiral anchor rod and the connection piece can be smoothly screwed into a coal roadway anchor hole.

Description

Technical field [0001] The invention relates to the technical field of coal road support, in particular to an ultra-long hollow spiral grouting bolt connector. Background technique [0002] In the soft coal seam roadway support in our country, in order to strengthen the strength of the surrounding rock of the coal roadway, grouting treatment is required, and individual coal roadways need deep grouting treatment. However, when working in the deeper and softer coal seam for support, it often takes longer Due to the restriction of production and transportation, the length of the anchor rod is limited. Therefore, the development of a connector for anchor rod connection has become an urgent task. Summary of the invention [0003] The invention provides an ultra-long hollow spiral grouting anchor rod connector, which is used for the connection between anchor rods in the ultra-long support. [0004] The invention is realized as follows: the front end of the anchor rod is welded to the fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00
Inventor 蔺云宏张健耿录云张利民张光明张加冕
Owner 张延策
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