From the 1950s or 1960s, this historic image was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH), The photograph depicted a coal miner spraying water against the walls of a mine shaft. In this way, freshly excatvated regions of the mine, which were laden with ore dust, when wet, would minimize the tendancy of the dust to become airborne, thereby, keeping the confined air particulates to a minimum. Note that this miner was not wearing any protective facial breathing gear such as a filtered mask. In the small confines of a mine, airborne coal dust can emanate from almost anywhere in the shaft network, which made miners predisposed to the long-term negative health effects of this profession such as 'black lung disease', or 'coal-workers' pneumoconiosis' (CWP).
CDC/ Barbara Jenkins, NIOSH; Bureau of Mines, Dept. of Interior
November 26, 2012
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