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Underground coal mining technology has changed significantly since the 1920s as coal mining has become highly mechanized. Recently, NIOSH and MSHA conducted a joint survey to determine the range of coal particle sizes found in dust samples collected from intake airways of US coal mines. This is the first comprehensive survey of this type since the 1920s. Dust samples were collected by MSHA inspectors from mines in each of MSHA's 10 bituminous Coal Mine Safety and Health districts.
| Author(s): | Cashdollar-KL, Harris-ML |
| Reference: | Coal USA Mag 2008 May; :23 |
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