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Basic Mine Ventilation

76 Basic Mine Ventilation 77 IntroductionxFace Ventilation Stoppings Check Curtains Air Measurements xPrincipals of Airflow xRespirable Dust Control xUse of Scrubbers xActions for Excessive Methane xRock Dusting xPermissibility7879808182838485868788899 091929394959697 Outby End of Curtain Scrubber Off 4,000 cfm Scrubber On 4,300 cfm Inby End of Curtain Scrubber Off 3,000 cfm Scrubber On 7,500 cfm 9899100101102103104

downstream (low pressure) side. This causes the curtain to belly (balloon) in toward the rib - because air is trying to get from the wide (high pressure) side of the entry to the tight (low pressure) side of the entry behind the curtain. Reducing the …

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