Equipment and method for treating hypoxia of return air corner

Abstract

The invention relates to equipment and a method for treating hypoxia of a return air corner, and belongs to the technical field of coal mine safety. The equipment comprises an air compressor located on the ground and a compressed air pipeline connected with the air compressor, a connecting device is arranged at the end, away from the air compressor, of the compressed air pipeline, the connecting device is communicated with an air outlet device through a high-pressure connecting pipe, the air outlet device comprises a plurality of hollow vertical pipes, the two ends of each vertical pipe are sealed, and each vertical pipe is provided with an air inlet connected with the high-pressure connecting pipe. A plurality of uniformly arranged air outlet holes are formed in the vertical pipe in the axial extension direction; the vertical pipe is vertically fixed to a hydraulic support at the air return corner of the working face, so that the air outlet directly faces the air return corner. A compressed air belt is formed through the equipment, and the technical problem of low oxygen of the air return corner is solved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a device and a method for controlling low oxygen in return air corners. Background technique [0002] With the continuous deepening of coal mining depth and the continuous increase of mining intensity, the oxygen concentration is often lower than the safe value and the concentration of toxic and harmful gases exceeds the standard in the return air corner during the recovery of the fully mechanized top coal caving face. Bring major safety hazards, and even stop production to take measures to prevent and control, seriously restricting the production efficiency of coal mines. The main reason is that the hypoxic gas in the goaf rushes out from the return air corner at the lowest negative pressure point of the fully mechanized mining face, resulting in a decrease in the oxygen concentration in the return air corner of the working face. [0003] At present, the co...

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Problems solved by technology

[0002] With the continuous deepening of coal mining depth and the continuous increase of mining intensity, the oxygen concentration is often lower than the safe value, and the concentration of toxic and harmful gases exceeds the standard in the return air corner during the recovery of the fully mechanized top coal caving face. Bring major safety hazards, even stop production and take measures to prevent and control, seriously restricting coal mine production efficiency

The main reason is that the hypoxic gas in the goaf gushes out from the return air corner at the lowest negative pressure point of the fully mechanized mining face, resulting in a decrease in the oxygen concentration in the return air corner of the working face

[0003] At present, the commonly used methods for the prevention and control of hypoxia in the working face mainly include equalizing pressure, plugging the upper and lower wells, building windshield walls at the upper and lower corners, setting up wind guide curtains at the upper corners, hanging windshield curtains at the upper and lower corners, and installing special Exhaust fans, etc., but their devices are relatively complicated, and the main control ideas are mostly to reduce the air leakage from the goaf to the working face, which cannot completely solve the problem of low oxygen in the return air corner

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