| 摘要 |
<p>A gas outburst prevention and control method, comprising: drilling a detection hole on the coal wall surface of a tunnel; acquiring a first pressure value of the coal wall surface and a second pressure value of the bottom of the detection hole; if the result obtained after subtracting the second pressure value from the first pressure value is greater than a preset threshold, then the site of the detection hole is a dangerous area having a gas pocket; drilling into the gas pocket in the dangerous area with an auger stem; after drilling to a predetermined depth in the gas pocket, stopping the feed of the auger stem and fixing the position; conveying gas and coal dust in the gas pocket into a coal-gas separator via the rotation of the auger stem; the coal-gas separator discharges the coal dust via a coal dust discharge pipe, and discharges the gas into an exclusive pumping pipe or a return airway via a gas discharge pipe. The present method can simply, accurately, reliably and efficiently detect a gas pocket in a coal bed, and eliminate the hidden danger of a physical explosion, thus avoiding harm to miner lives and properties caused by a gas outburst.</p> |
