Positive-pressure acquisition apparatus for trace gas on coal-mine working face and acquisition method thereof

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.