Self-drilling type single-liquid and double-liquid grouting reinforcement device and using method

Abstract

The invention discloses a self-drilling type single-liquid and double-liquid grouting reinforcement device and a using method and belongs to the technical field of coal and rock mass grouting support. The reinforcing device comprises a self-drilling hollow pipe body and a grouting joint, wherein the grouting joint comprises a sleeve, a liquid guide device and a liquid inlet pipe; a front end of the hollow pipe body is connected with a drill bit, so characteristics of the anchor rod are realized, a drill rod can be replaced, the rod does not need to be withdrawn after drilling to the designed depth, a tail end of the pipe body is connected with a grouting connector and then direct grouting is conducted, a problem of hole collapse possibly occurring when the drill rod is withdrawn under the condition that surrounding rock is broken is solved, and repeated through-hole in the hole collapse position is avoided; or the surrounding rock is disturbed after multiple times of re-drilling nearby, so investment of manpower and material resources is reduced, and normal implementation of the original design is ensured; according to site conditions, single-liquid or double-liquid grouting can be selected, and part of injected grout can permeate into surrounding rock cracks, so the anchoring quality is improved. The method can be realized through manual operation of a machine and a full-automatic mode, and accords with the development trend of intelligent automation of mines.

Description

technical field [0001] The invention belongs to the technical field of grouting support for coal and rock masses, and in particular relates to a self-drilling single-double liquid grouting reinforcement device and a use method. Background technique [0002] In coal mines, metal mines, tunnels and other geotechnical engineering, for the influence of excavation, adjacent roadway excavation, working face advancement, etc., and the surrounding rock itself is relatively broken due to the influence of geological structure, the disadvantages of traditional anchoring technology There are mainly the following aspects: 1) During the installation of ordinary anchor rods, after the drill pipe needs to be withdrawn, the anchor rod should be used to push the anchoring agent to the bottom of the hole. There may be hole collapse, which will cause the anchor agent to break at the collapsed hole when pushing the anchoring agent, and the anchoring quality is likely to be substandard. It is nec...

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Problems solved by technology

[0002] In coal mines, metal mines, tunnels and other geotechnical engineering, for the influence of excavation, adjacent roadway excavation, working face advancement, etc., and the surrounding rock itself is relatively broken due to the influence of geological structure, the disadvantages of traditional anchoring technology There are mainly the following aspects: 1) During the installation of ordinary anchor rods, after the drill pipe needs to be withdrawn, the anchor rod should be used to push the anchoring agent to the bottom of the hole. There may be hole collapse, which will cause the anchor agent to break at the collapsed hole when the anchoring agent is pushed, and the anchoring quality is likely to be substandard. It is necessary to re-open the collapsed hole, or re-drill several times in the vicinity before installing Anchor rods cannot be successfully installed even after multiple drillings, which not only greatly increases the input of manpower and material resources, but also further damages the integrity and strength of the originally loose and broken surrounding rock, and the original design form cannot be obtained. Guarantee; 2) The traditional bolt installation process is cumbersome, and the speed of support advancement is slow. With the increasing development of roadway excavation technology, the advancement speed of the excavation face is increasing. If the traditional anchoring method is still used, mining joints may occur 3) The solidification time of the grouting liquid in the ordinary hollow grouting bolt is relatively long, and there will also be a problem of tight mining sequence for roadways with broken surrounding rock structures.

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