Gas testing method and device for worked-out section of stope of coal mines

Abstract

The invention relates to a gas detection method and a device thereof in a goaf of stope of coal mines, which can carry out dynamic detection to the gas in the goaf of stope of coal mine. The invention lays a hard protective pipe with a plurality of detection through holes in an air-return gate road of the area of stope of coal mines, and leads the first detection through hole of the hard protective pipe to be positioned at the joint of the goaf and a working face, and gas collecting pipes are positioned in the hard protective pipe and penetrate out respectively from the detection through holes. During detection, the gas collecting pipe corresponding to the first detection through hole is communicated with a gas collecting main pipe so as to collect the gas in the goaf in real time and send the gas to a detection center for analysis. When the stope working face advances for a certain distance, the gas collecting pipe corresponding to the second detection through hole is communicated with the gas collecting main pipe, and a next hard protective pipe is laid after the last gas collecting pipe in the current hard protective pipe finishes the collecting mission, therefore, dynamic detection to the gas in the goaf can be realized.

Description

technical field [0001] The invention relates to the detection of gas in coal mines, in particular to a gas detection method and device for gobs in coal mine back mining. Background technique [0002] In the process of coal mine production, the gas composition and concentration of the spontaneous combustion area in the goaf of the coal mining face are very important for safe production. Monitoring the escape of toxic gas in the working face is an important prerequisite for safe production in coal mines. The mining face is advancing every day, and the spontaneous combustion area of ​​the goaf also moves with the movement of the working face, so the monitoring area also needs to change dynamically as the working face advances. During the mining process of the working face, the top of the goaf will collapse and a large number of stones will fall, and at the same time, there will be slabs on the coal wall, and the oxygen content in the goaf is less, so personnel cannot enter the...

AI Technical Summary

Problems solved by technology

During the mining process of the working face, the top of the goaf will collapse and a large number of stones will fall, and at the same time, there will be slabs on the coal wall, and the oxygen content in the goaf is less, so personnel cannot enter the goaf. It is also impossible to use manpower to directly collect gas components

Although it is very important to detect the gas in the gob area of ​​the mining face that is prone to spontaneous combustion, due to the above reasons, there is currently no good way to dynamically analyze the gas in the gob area of ​​the mining face

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