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Closing the door to dust when adding drill steels. Uni-directional cab filtration and pressurization system tested.

Authors
Cecala-A; Organiscak-J; Zimmer-J; Moredock-D; Hillis-M
Source
Rock Prod 2007 Oct; 110(10):29-32
NIOSHTIC No.
20032805
Abstract
During a recent National Institute for Occupational Safety and Health field evaluation of a newly designed filtration and pressurization system for an enclosed cab of a surface drill, it was determined that the drill operator's respirable-dust exposure was significantly increased during time periods when the cab door was opened to manually guide another section of drill steel into place to achieve additional cutting depth. Although no dust cloud was visible when the door was opened to perform this task, the drill operator's exposure was documented (over a three-day test period) to be nine times higher than when the cab door was closed. Even at this higher respirable-dust concentration, the drill operator's exposure remained well below the permissible exposure limit governed by the federal dust standard; however, an alternative method is being investigated to guide the drill steel in place in order to eliminate this increased exposure.
Keywords
Mining-industry; Mining-equipment; Control-technology; Engineering-controls; Dust-control; Dust-control-equipment; Dust-exposure; Respirable-dust; Surface-mining
CODEN
ROPRA5
Publication Date
20071001
Document Type
Journal Article; Trade
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Issue of Publication
10
ISSN
0747-3605
NIOSH Division
PRL
Source Name
Rock Products
State
PA
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