Water blowing structure for coal mine underground gas extraction and construction method thereof

Abstract

The invention discloses a water blowing structure for coal mine underground gas extraction and a construction method thereof. The water blowing structure for coal mine underground gas extraction comprises an extraction system and an air compressing system. A gas suction port is formed in the upper portion of a gas-water separator; a first valve is arranged on the gas suction port and connected with a three-way joint of the extraction system through a first hose; the bottom of the gas-water separator is connected with a drainage device; the side edge of the upper portion of the gas-water separator is connected with a second hose, and the second hose is connected with a water blowing device; the side edge of the water blowing device is connected with the air compressing system through a second valve, and the other end of the water blowing device is connected with a hole-sealing screen pipe; and a water blowing pipe is arranged inside the hole-sealing screen pipe ad connected with the second valve. After a pipeline is connected, the second valve with a high-pressure pipe rapid connector is opened to supply air into a drilled hole when accumulated water exists in the drilled hole, so that the accumulated water is blown out, then enters the gas-water separator and is drained from the drainage device. The accumulated water in the drilled hole is discharged timely through air-compressing water blowing, hole collapse of the drilled hole due to soaking of the accumulated water is prevented, long-term efficient extraction of the gas extraction drilled hole is kept, and the great effect is achieved.

Description

technical field [0001] The invention relates to a drilling and drainage device for gas drainage, in particular to an underground gas drainage and blowing structure in coal mines and a construction method thereof, belonging to the technical field of underground gas drainage in coal mines. Background technique [0002] The main means of gas control in the underground production process of coal mines are gas drainage and wind exhaust. "Two blocks and one injection" seal the hole with pressure in place. However, the underground construction drilling of coal mines, especially the downward drilling, is prone to water accumulation, which seriously affects the gas drainage time and gas drainage effect. This new type of practical water blowing device was invented without solving the problem of water accumulation in the downward drilling. Contents of the invention [0003] The technical problem to be solved by the present invention is: to provide a coal mine underground gas drainag...

AI Technical Summary

Problems solved by technology

However, the underground drilling of coal mines, especially the downward drilling, is prone to water accumulation, which seriously affects the gas drainage time and gas drainage effect. This new type of practical water blowing device was invented without solving the problem of water accumulation in the downward drilling.

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