- rock dust
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a crushed limestone sprayed on surfaces in mines to make coal dust incombustible in case of a gas explosion.[1930-35]
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Universalium. 2010.
rock dust
Look at other dictionaries:
rock|dust — «ROK DUHST», transitive verb, intransitive verb. to coat (the surfaces of a coal mine) with finely powdered limestone in order to blanket the highly explosive coal dust in the mine … Useful english dictionary
rock-dust — ˈ ̷ ̷ˌ ̷ ̷ transitive verb Etymology: rock dust : to spread or distribute rock dust in (coal mine workings) to reduce the explosion hazard … Useful english dictionary
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rock dust — noun : pulverulent rock (as shale or limestone) used in rock dusting called also stone dust * * * a crushed limestone sprayed on surfaces in mines to make coal dust incombustible in case of a gas explosion. [1930 35] … Useful english dictionary
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