Device and method for sealing drill hole by flexible filling material

Abstract

The invention discloses a device and method for sealing a drill hole by a flexible filling material. The device comprises a gas extracting tube, a drape expansion bag, a grouting line, a return pipe and metal fixing sleeves, wherein the gas extracting tube passes through the drape expansion bag and the metal fixing sleeves connected to two ends of the the gas extracting tube; two metal fixing sleeves are fixed on the gas extracting tube; then the gas extracting tube is connected with other gas extracting tubes to be conveyed to the drill hole; the flexible filling material is injected into the drape expansion bag through the grouting line, and injection is stopped when the return pipe returns the slurry; a plurality of pores are arranged in the drape expansion bag; and the flexible filling material can permeate into a coal wall around the drape expansion bag through the pores, is fully combined with the coal wall, and permeates into cracks around the drill hole. Thus, the extracting drill hole is effectively sealed.

Description

[0001] technical field [0002] The invention relates to a drilling and sealing device and method for flexible filling materials, which belong to the field of gas control technology and equipment in the underground area of ​​coal mines, and are especially suitable for drilling and sealing operations in gas drainage boreholes with relatively high water content. Background technique [0003] Effective sealing of boreholes for gas drainage is the key to underground gas drainage in coal mines. At present, polyurethane, organic resin materials or cement-like sealing materials are commonly used in coal mines in my country. These materials are mixed with various chemical slurries by manual mixing. After stirring, they are adsorbed with cotton cloth and wrapped on the gas drainage pipeline, and inserted together with the gas drainage pipeline. Drainage hole. Or inject directly into the extraction hole through the grouting pump. Since the mixed slurry has begun to foam and expand dur...

AI Technical Summary

Problems solved by technology

Or inject directly into the extraction hole through the grouting pump. Since the mixed slurry has begun to foam and expand during the advancement of these materials in the extraction hole, after the reaction is complete, the generated drilling sealing materials are all solid materials, forming a solid sealing hole There will be a large number of pores and cracks in the material body, which will affect the gas drainage effect during the gas drainage process

And the existing gas drainage borehole sealing device or method all assumes that the borehole has no water or less water content, and ignores the influence of the water-filled borehole sealing material to seal the borehole.

However, most of the existing boreholes are drilled by hydraulic slag removal. After the boreholes are formed, water accumulates inside, and polyurethane and organic resin polymer materials are easy to shrink and deform when exposed to water, which cannot effectively seal the boreholes; The influence of internal water leads to poor sealing quality of cement-based materials, which easily leads to failure of sealing

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