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Mining Publication: Determining the Spatial Variability of Personal Sampler Inlet Locations
Keywords: Coal dust Personal dust monitors Personal monitoring Respirable dust level Sampling
Original creation date: August 2007
Authors: RP Vinson, JC Volkwein, LJ McWilliams
Peer Reviewed Journal Article - August 2007
Download PDF Document (0.17 MB)
NIOSHTIC2 Number: 20032591
J Occup Environ Hyg 2007 Aug; 4(9):708-714
This article examines the spatial variability of dust concentrations within a coal miner’s breathing zone and the impact of sampling location at the cap lamp, nose, and lapel. Tests were conducted in the National Institute for Safety and Health Pittsburgh Research Laboratory full-scale, continuous miner gallery using three prototype personal dust monitors (PDM). The dust masses detected by the PDMs were used to calculate the percentage difference of dust mass between the cap lamp and the nose and between the lapel and the nose. The calculated percentage differences of the masses ranged from plus 12% to minus 25%. Breathing zone tests were also conducted in four underground coal mines using the torso of a mannequin to simulate a miner. Coal mine dust was sampled with multi-cyclone sampling cans mounted directly in front of the mannequin near the cap lamp, nose, and lapel. These four coal mine tests found that the spatial variability of dust levels and imprecision of the current personal sampler is a greater influence than the sampler location within the breathing zone. However, a one-sample t-test of this data did find that the overall mean value of the cap lamp/nose ratio was not significantly different than 1 (p-value = 0.21). However, when applied to the overall mean value of the lapel/nose ratio there was a significant difference from 1 (p-value < .0001). This finding is important because the lapel has always been the sampling location for coal mine dust samples. But these results suggest that the cap location is slightly more indicative of what is breathed through the nose area.
Image of publication Determining the Spatial Variability of Personal Sampler Inlet LocationsPeer Reviewed Journal Article - August 2007
Download PDF Document (0.17 MB)
NIOSHTIC2 Number: 20032591
J Occup Environ Hyg 2007 Aug; 4(9):708-714
See Also
Benchmarking Longwall Dust Control Technology and Practices
Enhanced Utilization of Personal Dust Monitor Feedback
Equivalency of a Personal Dust Monitor to the Current United States Coal Mine Respirable Dust Sampler
Investigation of Coal Properties and Airborne Respirable Dust Generation
Laboratory and Field Performance of a Continuously Measuring Personal Respirable Dust Monitor
Laboratory Evaluation of Pressure Differential-based Respirable Dust Detector Tube
Respirable Quartz Hazard Associated with Coal Mine Roof Bolter Dust
Rock Dusting Considerations in Underground Coal Mines
Status of a Tapered Element, Oscillation Microbalance-Based Continuous Respirable Coal Mine Dust Monitor
Testing a Revised Inlet for the Personal Dust Monitor
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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