Spiral sharp-rib anchor rod and spiral rib drilling rod for drilling hole of spiral sharp-rib anchor rod

Abstract

The spiral sharp-rib anchor rod has one straight rod section and one rod section with rolled spiral sharp-rib on the surface. The spiral rib drilling rod for drilling the spiral sharp rib hole has one rod body with rolled spiral rib and one bit on one end of the rod body. The present invention makes it possible to fix the bolt support inserted into the hole without using bolt support fixing agent and this makes the operation simple and the bolt support reusable.

Description

technical field [0001] The invention relates to a support tool for mines, which is a spiral sharp-rib bolt and a spiral-rib drill pipe for drilling the hole of the spiral sharp-rib bolt. Background technique [0002] At present, most of the drill pipes and anchor products used for support in mines are single hexagonal steel, twisted steel, spiral ribs and round steel welded on the round steel, and the anchor rods are mostly rebar. When in use, first drill a round hole with a nominal diameter of 28 mm and a depth of more than 1.8 mm with an ordinary drill pipe, and then insert an anchor rod with a nominal diameter of 18-22 mm into it. Since the anchor rod is thin and the hole is large, it is necessary to add The anchoring agent fixes the anchor rod, and there are objectively cumbersome means of installing the anchor rod, which increases the consumption of expensive anchoring agent materials and construction costs. If drilling is matched with an ordinary drill pipe with a hol...

AI Technical Summary

Problems solved by technology

When in use, first drill a round hole with a nominal diameter of 28 mm and a depth of more than 1.8 mm with an ordinary drill pipe, and then insert an anchor rod with a nominal diameter of 18-22 mm into it. Since the anchor rod is thin and the hole is large, it is necessary to add The anchoring agent fixes the anchor rod, and the installation method of the anchor rod is cumbersome, which increases the consumption of expensive anchoring agent materials and construction costs

If you drill an ordinary drill pipe that matches the existing anchor rod with a hole smaller than 18-22 mm: first, the rigidity is not enough to work; second, it is difficult to discharge slag during drilling;

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