A positive pressure collection device and collection method for trace gas in coal mine working face

Abstract

The invention discloses a positive-pressure acquisition apparatus for trace gas on a coal-mine working face and an acquisition method thereof, and relates to the technical field of trace gas monitoring. The apparatus comprises a hydraulic-drilling-machine drilling and production device, the hydraulic-drilling-machine drilling and production device is connected with a trace gas and coal powder separation and recovery device, the trace gas and coal powder separation and recovery device is connected with a positive / negative-pressure sampling packaging device, and the positive / negative-pressure sampling packaging device is connected with a positive-pressure maintaining and isolation device. The apparatus and the method comprises the following advantages: the sampled sample is trace gas, operation is simple, the drilling and production depth can be conveniently measured, separation of coal powder and the sample gas can be realized, the sample gas is guaranteed to be not polluted by air through automatic manner and hand-operated manner, and coal powder can be recovered.

Description

technical field [0001] The invention relates to the technical field of trace gas monitoring, in particular to a positive pressure collection device for trace gas in a coal mine working face and a collection method thereof. Background technique [0002] Coal and gas outburst is one of the natural disasters that seriously affect the safe production of coal mines. The sudden ejection of gas and coal powder can fill thousands of meters of tunnels, causing underground casualties, and may cause fire and explosion accidents. Coal and gas outbursts Dangerous, always threatening the safety of coal mine production. [0003] In the process of long-term research on gas outburst prediction, it is found that the change of He and Ar content in the coal seam can reflect the stress state of the coal seam. A significant emission of He values ​​occurs in the stress concentration zone, while a significant emission of Ar occurs in the pressure decay zone. The change of He and Ar can reflect th...

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Problems solved by technology

[0014] The technical problem to be solved by the present invention is to provide a positive pressure collection device for trace gas in coal mine working face and its collection method, so as to overcome the fact that the existing technology cannot guarantee the real-time sampling, the whole sampling process has a long period, and it is easy to mix in the sampling process. Impurities such as coal powder and air greatly affect the accuracy of the test results. During the process of sample packaging, air is easily mixed into the sample tank, which is difficult to store and transport.

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