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Reducing enclosed cab drill operator's respirable dust exposure with effective filtration and pressurization techniques.

Authors
Cecala-AB; Organiscak-JA; Zimmer-JA; Heitbrink-WA; Moyer-EA; Schmitz-M; Ahrenholtz-E; Coppock-CC; Andrews-EH
Source
J Occup Environ Hyg 2005 Jan; 2(1):54-63
NIOSHTIC No.
20025912
Abstract
Many different types of surface mining equipment use enclosed cabs to protect equipment operators from health and safety hazards. The overburden removal and mining process can be extremely dusty and can cause excessive dust exposure. To study this issue, a cooperative research effort was established between the National Institute for Occupational Safety and Health, U.S. Silica Co., Clean Air Filter Co., and Red Dot Corp. in an effort to lower respirable dust levels in an enclosed cab on an older surface drill at a silica sand operation. Throughout this research effort, a number of modifications were incorporated into the drill's filtration and pressurization system, as well as in other areas, to improve its design and performance. An average cab efficiency of 93.4% was determined with the gravimetric sampling instruments when comparing the outside with the inside cab dust levels on the final design. Although this study considered just one operation, the goal was to identify cost-effective improvements that could be implemented on all types of enclosed cabs to lower respirable dust concentrations. Two critical components for an effective enclosed cab system are having a properly designed, installed, and maintained filtration and pressurization system, along with a method for maintaining structural cab integrity, which allows the cab to be positively pressurized. Another important component is maintaining cab cleanliness. Although this research was originally directed toward the mining industry, it is also applicable to agricultural or construction equipment.
Keywords
Dust-control; Dust-exposure; Equipment-design; Respirable-dust; Silica-dusts; Filtration; Mining-equipment; Dust-particles; Particulate-dust; Particulates; Engineering-controls; Mine-workers; Miners; Mining-industry; Enclosed-cab; Filtration-and-pressurization-system; Respirable-dust; Silicosis; Construction-equipment; Agricultural-machinery
Contact
National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 626 Cochrans Mill Road, Pittsburgh, PA 15236
CODEN
JOEHA2
CAS No.
7631-86-9
Publication Date
20050101
Document Type
Journal Article
Email Address
aic1@cdc.gov
Funding Type
Grant
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008491
Issue of Publication
1
ISSN
1545-9624
NIOSH Division
PRL; DRDS
Source Name
Journal of Occupational and Environmental Hygiene
State
IA; PA; WA; WV
Performing Organization
University of Iowa
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