Comparison of the Particle Size Distribution of Alpha Quartz Found in Respirable Dust Samples Collected at Underground and Surface Coal Mines with Four Reference Standards
The object of this research was to compare the size distribution of respirable quartz found in samples collected at nine underground and thirteen surface coal mines with that of four reference standards used to quantify quartz in respirable dust samples. Particle size measurements were made on all samples using a scanning electron microscope in the backscatter electron mode of operation, interfaced with an image analysis system. The Mine Safety and Health Administration, Pittsburgh, Pa. provided the respirable dust samples which were collected at coal mine sites in 7 states. The accumulated particle size measurements indicate three reference standards, minus 5-μm Min-U-Sil, minus 5-μm Supersil, and NBS 1878 would be preferred over the fourth, Silver Bond B for quantitative quartz determinations in coal mine dusts by x-ray diffraction and infrared spectrometry.
KeywordsCoal Mine Dust Sample Mine Safety Quartz Particle Underground Coal Mine
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