FIELD: mining industry. SUBSTANCE: device consists of pipeline having side inlet opening at fan, and additional side opening at end part at distance from end inlet opening equalling distance of coal throwing in case of sudden outburst. This opening covers safety valve which operates when inlet end opening is clogged. Side opening of fan has hatch for dilution of exhausted gas-air mixture with fresh air. Side opening at outlet part and inlet end opening have metal screens to prevent coal and rock lumps from getting inside pipeline. EFFECT: higher efficiency. 3 cl, 3 dwg
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