BreathoffreshairWithnoaspectofundergroundminesafetymorefundamentalthanproperventilation,estoundergroundmineworkings,,rendertheairharmless,,ventilationsystemsformacrucialpanofthedesignofanymine,thelayoutofwhichisdeterminedbytheorebodygeology,legislation,availablemanpower,,,whateversystemiseventuallyplannedwillinevitablysufferfromimperfectimplementationandcontrolbecauseoftheday-to-plexitiesoftheextractionoperation.“Ventilationinthemodemmineisanessentialprerequisite,-upofcarbondioxideintheair,themine-ventilationsystemmustbeabletokeepquantitiesofcontaminantsbelowharmfullevels,”saysMikeBeare,:“Amodernminehasmanysourcesofharmfulsubstances,includingfumesfromexplosives,,themodemapproachtomining(includingtheuseofdiesel-rucksandloaders)resultsinlargequantitiesofCO,nitrousfumesanddiesel-pa
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