Method of combined mining caving face using false dipping after high drainage roadway treating gas in beginning mining

Abstract

The present invention provides a method that the comprehensive surface utilizes a fake inclined rear high pumping lane to manage the gas in the initial period to solve the problem of gas on the comprehensive surface in the initial mining period. The present invention is characterized in that a slope is made in a return airway arranged at the corner of a work surface; the opening of the return airway is arranged in a tangent lane along the working surface and climbs the slope with a certain angle, thus excavating a fake inclined lane with a small cross section communicated with the rail of the rear high pumping lane and then discharging the gas adjacent to the working surface under the pumping negative pressure of the high pumping lane; the key is to arrange the lane on the rim zone when the top plate is in initial caving and gradually discard section by section from up to down along the caving of the top plate, thus the pumping negative pressure moving upwards and the gas density gradually increasing until the caving height of the top plate is communicated with the high pumping lane and connected with an underground gas pumping system; through arranging the lane, the gas gushing out from the adjacent coal layer and the local layer. The present invention with the advantages of security, reliability, low cost, convenient construction and good effect is particularly applicable to the gas management in coal mine.

Description

technical field [0001] The invention belongs to the technical field of gas control in coal mines, and in particular relates to a method for controlling gas in a fully mechanized caving face at the initial mining stage by using a pseudo-inclined rear high pumping roadway. Background technique [0002] As far as the inventor knows, fully mechanized top coal caving is a high-yield and efficient coal mining method. Due to the high mining intensity of the fully mechanized caving face and the intense activity of the overlying strata, a large amount of gas in the pressure relief area flows to the coal mining face, making the fully mechanized caving The amount of gas gushing out of the face has doubled, and the gas in the working face has seriously exceeded the limit. Therefore, it is difficult to control the gas gushing out during the initial mining period. The roadway is above the pressure relief range. During the initial mining period, the gas gushing out from the nearby adjacent...

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Problems solved by technology

[0002] As far as the inventor knows, fully mechanized top coal caving is a high-yield and efficient coal mining method. Due to the high mining intensity of the fully mechanized caving face and the intense activity of the overlying strata, a large amount of gas in the pressure relief area flows to the coal mining face, making the fully mechanized caving The amount of gas gushing out of the face has doubled, and the gas in the working face has seriously exceeded the limit. Therefore, it is difficult to control the gas gushing out during the initial mining period. The roadway is above the pressure relief range. During the initial mining period, the gas gushing out from the nearby adjacent layers due to the first collapse of the old roof will all flow into the working face, causing the gas to exceed the limit in the working face, and the ventilation of the working face cannot be increased without limit. It is also difficult to use ventilation to solve the gas problem

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