Abstract
Abstract The use of diesel-powered equipment in coal mines is increasing. Diesel particulate matter (DPM) found in the respirable dust in underground coal mines has been of concern as an additional health hazard because DPM has been found to be a mutagen and/or carcinogen. Although the regulated exposure limit has not been established, there is a need to control DPM. In order to control DPM effectively, it must be measured quantitatively. The Laser Raman Quantitative Analysis (LRQA) technique was developed to measure the fractions of diesel particulate and coal dust on a filter similar to the filter currently used to measure the mine ambient air concentration of respirable coal dust. This article discusses use of the LRQA method to determine the fractions of diesel and coal aerosol in a fourth U.S. underground coal mine. The LRQA method has several advantages, that is, the measurement is independent of the particle size and there is no sample preparation that may alter the sample. This article discusses r...
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