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Field evaluation of air-blocking shelf for dust control on blasthole drills.

Authors
Potts-JD; Reed-WR
Source
Int J Min Reclam Environ 2011 Mar; 25(1):32-40
NIOSHTIC No.
20039267
Abstract
In previous studies, an air-blocking shelf has been shown to be successful in reducing respirable dust leakage from the drill shroud in a laboratory setting. Dust reductions of up to 81 percent were achieved with the shelf under operating conditions consisting of a 1.9:1 collector-to-bailing airflow ratio and a 5.1-cm gap between the shroud and ground. Recent research focused on evaluating the shelf on two actual operating blasthole drills, in much more severe environments. In the field, the shelf reduced dust levels in the areas surrounding one operating blasthole drill by 70 percent. Dust reductions measured in the immediate vicinity of the shroud were reduced by 66 percent at one mine and 81 percent at the other mine. These field tests confirm that the air-blocking shelf is useful for reducing respirable dust generation from blasthole drills.
Keywords
Mining-equipment; Mining-industry; Control-equipment; Control-systems; Dust-collection; Dust-control; Dust-control-equipment; Dust-exposure; Dusts; Respirable-dust; Air-flow; Dust-measurement; Dust-suppression; Airborne-dusts; Surface-mining; Tools; Power-tools; Silica-dusts; Author Keywords: drilling; dust; surface mine
Contact
W. Randolph Reed, Dust Control, Ventilation, and Toxic Substance Branch, Office of Mine Safety and Health Research, NIOSH, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA
CAS No.
7631-86-9; 14808-60-7
Publication Date
20110301
Document Type
Journal Article
Email Address
rreed@cdc.gov
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Issue of Publication
1
ISSN
1748-0930
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
International Journal of Mining, Reclamation and Environment
State
PA
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