Coal mine underground deep hole quick sealing and grouting device

Abstract

The invention discloses a coal mine underground deep hole quick sealing and grouting device and belongs to the technical field of coal mine underground grouting and hole sealing. The grouting device is high in engineering timeliness and grouting speed and large in diffusion radius and can achieve the objective of single-hole sectional continuous grouting. A one-way valve joint is of an internal thread structure with a forward thread at one end and a reverse thread at the other end, the reverse thread of the one-way valve joint is connected with the front end of a grouting central pipe, a sealing cover is hermetically mounted at the rear end of the grouting central pipe in a sleeved manner, a top cap, a turnbuckle, a one-way valve and a rubber sleeve are sequentially and fixedly mounted onthe outer wall of the grouting central pipe in a sleeved manner, the front end of the one-way valve is abutted against the top cap and the turnbuckle, each of two ends of the rubber sleeve is clampedand shaped through an iron core and an iron loop, an upper iron core on the rubber sleeve is fixed on the grouting central pipe, a lower iron core movably sleeves the grouting central pipe, and an inlet of the one-way valve is communicated with the inside of the grouting central pipe while an outlet of the same is communicated with the rubber sleeve.

Description

technical field [0001] The invention relates to a fast hole sealing and grouting device for underground deep holes in coal mines, belonging to the technical field of grouting and sealing holes for underground coal mines, and in particular to a fast hole sealing and grouting device for deep holes in underground coal mines. Background technique [0002] Water hazards are often encountered in the mine infrastructure and production process, such as water gushing at the working face, high-pressure floor water, roof water, fault water conduction, and collapsed column water conduction, all of which seriously threaten the safety of people and production. At present, the commonly used grout stoppers include three-claw type, different diameter type, hydraulic expansion type grout stopper, etc., but these machines are mostly used in ground engineering grouting holes, or for coal wall water injection sealing holes, and are used in underground grouting Few, especially in recent decades t...

AI Technical Summary

Problems solved by technology

At present, the commonly used grout stoppers include three-claw type, different diameter type, hydraulic expansion type grout stopper, etc., but these machines are mostly used in ground engineering grouting holes, or for coal wall water injection sealing holes, and are used in underground grouting Very little, especially since the improvement of stoppers has been stagnant in recent decades

Moreover, the existing grout stopper for downhole grouting is a disposable device, that is, an orifice pipe. During installation, the hole must be reamed first, then grouted to fix the pipe, and then to sweep the hole and grout, which is too time-consuming and laborious, and the grout Diffusion radius is limited, blocking effect is not good

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