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May 2017
Volume 69    Issue 5

Respirable dust measured downwind during rock dust application

Mining Engineering, 2017, Vol. 69, No. 5, pp. 69-74
Harris, M.L.; Organiscak, J.; Klima, S.; Perera, I.E.

DOI: https://doi.org/10.19150/me.7504

ABSTRACT:

The Pittsburgh Mining Research Division of the U.S. National Institute for Occupational Safety and Health (NIOSH) conducted underground evaluations in an attempt to quantify respirable rock dust generation when using untreated rock dust and rock dust treated with an anticaking additive. Using personal dust monitors, these evaluations measured respirable rock dust levels arising from a flinger-type application of rock dust on rib and roof surfaces. Rock dust with a majority of the respirable component removed was also applied in NIOSH’s Bruceton Experimental Mine using a bantam duster. The respirable dust measurements obtained downwind from both of these tests are presented and discussed. This testing did not measure miners’ exposure to respirable coal mine dust under acceptable mining practices, but indicates the need for effective continuous administrative controls to be exercised when rock dusting to minimize the measured amount of rock dust in the sampling device.



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