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Gas drainage device in coal mining area

A technology for gas drainage and mining areas, which is applied in the field of gas drainage devices in coal mining areas, which can solve problems that affect the effect of gas drainage, poor sealing of drainage pipes, and difficulty in completely releasing gas, etc., to achieve a plugging effect Good, promote gas flow performance, promote the effect of flow

Active Publication Date: 2019-12-31
HENAN INST OF ENG
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Problems solved by technology

When the current gas extraction device extracts the gas, it generally only relies on the negative pressure to extract the gas. When extracting, it is necessary to install a extraction pipe. The current extraction pipe is generally extended into the borehole, and then the hole is sealed. The hole is sealed with the agent, and then the negative pressure extraction is carried out. The sealing performance of the extraction pipe in this extraction method is not good, and the extraction effect is poor. Moreover, the gas hidden in the coal seam is difficult to be completely released, resulting in incomplete gas extraction. Affect the effect of gas extraction

Method used

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  • Gas drainage device in coal mining area
  • Gas drainage device in coal mining area
  • Gas drainage device in coal mining area

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] see Figure 1-4 , the present invention provides a technical solution: a gas drainage device in a coal mining area, which includes a drainage assembly, a plugging assembly 8, a drainage pipe 9 and a porous inner support assembly 12, wherein the drainage pipe 9 runs along Its longitudinal direction interval array is provided with a plurality of porous internal support components 12, and the extraction pipe 9 extends into the extraction borehole 13 of the...

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Abstract

The invention discloses a gas extraction device in a coal mining area. By setting a high frequency oscillator, the gas can be completely extracted and the gas flow can be promoted. In the process of gas extraction, a plugging assembly is firstly used to mount and position an extraction pipe and after well plugging, good sealing performance is ensured; later, an extraction pump is used, a control valve is controlled, the gas is firstly extracted, after the gas is extracted to a certain degree at an extraction hole, the high frequency oscillator is used to oscillate, and after a certain period of continuous extraction, a pulse aeration module is opened again, a protective gas is impulsively injected into a coal seam, after certain pressure arrives in the borehole in a certain time of pulse aeration, the gas in the borehole is continuously extracted, and thus, the high frequency oscillator is used to promote circulation of the gas, the extraction effects are ensured, the remaining small part of gas is subjected to exchange and circulation by using a pulse aeration mode, and the gas is completely extracted.

Description

technical field [0001] The invention relates to a gas drainage device in a coal mining area, and belongs to the technical field of coal mine gas drainage equipment. Background technique [0002] At present, in the process of mining a coal mine, it is necessary to drain the gas in the coal seam of the coal mine, so as to prevent accidents after the gas is unloaded. When the current gas extraction device extracts the gas, it generally only relies on the negative pressure to extract the gas. When extracting, it is necessary to install a extraction pipe. The current extraction pipe is generally extended into the borehole, and then the hole is sealed. The hole is sealed with the agent, and then the negative pressure extraction is carried out. The sealing performance of the extraction pipe in this extraction method is not good, and the extraction effect is poor. Moreover, the gas hidden in the coal seam is difficult to be completely released, resulting in incomplete gas extraction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00E21F17/00
CPCE21F7/00E21F17/00
Inventor 宋志敏任建刚李冰刘见宝曲艳伟刘登科
Owner HENAN INST OF ENG
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