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Goaf gas drainage method of stope working surface of coal mines

A technology of mining face and gas drainage, which is applied in the direction of gas discharge, mining equipment, earthwork drilling, etc., and can solve the problems of poor drainage effect of buried pipes in the upper air duct

Inactive Publication Date: 2008-12-10
郭国政
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Problems solved by technology

If the conventional ventilation method still cannot solve the gas concentration in the return air flow, the only option is to increase the air intake of the mining face, but the air intake of the mining face cannot be too large. The traditional method is to bury the pipe in the upper air duct for extraction, but The drainage effect of the air duct buried pipe on the mining face is poor

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  • Goaf gas drainage method of stope working surface of coal mines

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Embodiment Construction

[0013] The method of the present invention is as figure 1 As shown, the specific steps are as follows: the air duct 1 on the mining face is arranged with boreholes 2 and 3 in advance, and the bottom of the borehole is on the coal seam roof 4 of the mining face. Automatic caving, the gas in the goaf moves upwards, and is discharged into the upper air duct through the pre-arranged boreholes. Therefore, the roof gas drainage technology of the mining face is an effective method to control the gas in the goaf.

[0014] Economic Benefit Analysis of the Drainage Technology of the Present Invention

[0015] (1) The use of gas drainage on the roof of the gob in the mining face can reduce the gas concentration in the return air flow of the air duct on the mining face by 0.3%, which can save the air consumption of the mining face by 300m 3 / min, saving more than 103,000 yuan in electricity bills per year.

[0016] (2) It guarantees the safety of the mining face and has huge economic a...

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Abstract

The invention discloses a coal mine stope face goaf gas drainage method which comprises the following steps: first, drill holes are arranged on the upper air channel of the stope face; the drop bottoms of the drill holes are arranged on the top plate of the coal seam of the stope face; when the coal mine is stoped to the drop bottoms of the drill holes, because the top plate of the coal seam naturally caves, the gas of the goaf moves up, is drained by the preset drill holes, enters into the upper air channel and exhausted. The method is an effective method for controlling the gas of the stope face goaf with the gas going out of a mineshaft.

Description

technical field [0001] The invention relates to an effective method for gas control in a goaf of a mining face in a coal mining process with coal and gas outbursts, in particular to a gas drainage method for a goaf of a coal mining face. Background technique: [0002] In the Gaotu mine, gas management in the mining face has always been a major problem that plagues production. The source of gas in the mining face is mainly the gas gushing out of the coal seam and the gas gushing out of the goaf. The traditional solution to the gas gushing out of the goaf is to dilute the gas concentration by ventilation at the mining face, and the other is to inhale the gas at the mining face. The upper air duct buried pipe extraction. If the conventional ventilation method still cannot solve the gas concentration in the return air flow, the only option is to increase the air intake of the mining face, but the air intake of the mining face cannot be too large. The traditional method is to bu...

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Application Information

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IPC IPC(8): E21F7/00
Inventor 郭国政
Owner 郭国政
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