Gas testing method and device for worked-out section of stope of coal mines
A technology of gas detection and goaf, which is applied in the direction of measuring device, measurement, earthwork drilling and mining, etc. It can solve the problems of gas dynamic analysis and the inability to use gas component collection, etc., and achieve the effect of less maintenance personnel, simple structure and easy operation
Inactive Publication Date: 2012-07-25
XIAN UNIV OF SCI & TECH +1
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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 the coal wall will also be broken. In addition, there is less oxygen in the goaf, 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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[0019] Such as figure 1 As shown: the two sides of the coal seam 1 are provided with an air inlet chute 2 and an air return chute 3, and the workers carry out production operations in the working face area 4. The hard protective pipe 5 is a galvanized water pipe about 150 meters long, and is laid in the wind return trough 3 . There are three detection through-holes 51, 52, 53 drilled on the hard protection tube. The first detection hole 51 is located at the end of the hard protection tube 5. The distance between adjacent detection through-holes is 50 meters, which is slightly larger than that of the coal seam. The farthest distance between the spontaneously combustible area and the working surface. Three soft collection pipes 6 are inserted into the hard protection pipe 5, and they pass through three detection through holes respectively, and each collection pipe is responsible for collecting the gas sample of one measuring point. The three collection pipes 6 can be selective...
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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 the coal wall will also be broken. In addition, there is less oxygen in the goaf, so personnel cannot enter the goaf. Also just ...
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IPC IPC(8): G01N33/00G01N1/26E21B47/12
Inventor 吴建斌文虎邓军郑学召马砺许延辉徐林生何毅万雷
Owner XIAN UNIV OF SCI & TECH