Anti-slip hole sealing method for gas extraction drill hole of underground bottom drainage roadway

Abstract

The invention relates to an anti-slip hole sealing method for a gas extraction drill hole of an underground bottom drainage roadway. The method comprises the following steps of (1) constructing a layer-crossing drill hole; (2) assembling to form an anti-slip foetal sac hole packer; (3) inserting the anti-slip tire bag hole packer into the drill hole; (4) grouting the anti-slip tire bag hole packer, wherein the anti-slip tire bag hole packer is hung in the drill hole under the action of friction force between the rubber tire bag and the wall of the drill hole; and (5) an annular cavity between an upper rubber body tire bag and a lower rubber body tire bag continuing to be grouted, and grouting hole sealing operation being completed. According to the method, after drilling construction is completed and the extraction pipe and the hole packer are inserted into the drill hole, the hole sealing medium is injected into the rubber tire bag through the grouting pipe, and under extrusion of the pressure medium and the wall of the drill hole, a hole packer tire bag supports the drill hole and is embedded into the wall of the drill hole, so an extraction pipe is not prone to sliding, and the hole sealing effect is further improved through improvement of the sealing structure of the rubber tire bag.

Description

technical field [0001] The invention belongs to the technical field of gas drainage in coal mines, and in particular relates to an anti-slip sealing method for gas drainage drilling holes in underground bottom drainage lanes. Background technique [0002] After the construction of gas drainage drilling in the bottom drainage roadway, in order to ensure the smooth progress of gas drainage, the intubation and sealing of the holes must be carried out immediately. The hole is easy to collapse and the hole sealer cannot be inserted smoothly, and the drilled hole is easy to be scrapped. However, the hole sealers used in the bottom pumping tunnels of coal mines are generally longer in length. If a single hole is drilled and inserted immediately after the hole is formed, when the hole sealers are inserted into the upward holes in the bottom pumping tunnel, due to the larger self-weight of the hole sealers If no measures are taken, it is easy to slip off by itself. For example, inse...

AI Technical Summary

Problems solved by technology

[0002] After the construction of gas drainage drilling in the bottom drainage roadway, in order to ensure the smooth progress of gas drainage, the intubation and sealing of the holes must be carried out immediately. The hole is easy to collapse and the hole sealer cannot be inserted smoothly, and the drilled hole is easy to be scrapped

However, the hole sealers used in the bottom pumping tunnels of coal mines are generally longer in length. If a single hole is drilled and inserted immediately after the hole is formed, when the hole sealers are inserted into the upward holes in the bottom pumping tunnel, due to the larger self-weight of the hole sealers If no measures are taken, it is easy to slip off by itself. For example, insert a hole sealer for grouting immediately after a single hole is formed, and then clean the grouting pump immediately after grouting for each hole, which increases the workload of workers, reduces efficiency, and affects gas extraction. Efficiency and effectiveness and normal mining succession

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