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Effects of MERV 16 filters and routine work practices on enclosed cabs for reducing respirable dust and DPM exposures in an underground limestone mine.

Authors
Noll-JD; Cecala-AB; Organiscak-JA; Rider-JP
Source
Min Eng 2014 Feb; 66(2):45-52
NIOSHTIC No.
20045406
Abstract
An effective technique to minimize miners' respirable dust and diesel exposure on mobile mining equipment is to place mine operators in enclosed cabs with designed filtration and pressurization systems. Many factors affect the performance of these enclosed cab systems, and one of the most significant factors is the effectiveness of the filtration system. High-efficiency particulate air (HEPA)-type filters are typically used because they are highly efficient at capturing all types and sizes of particles, including those in the submicron range such as diesel particulate matter (DPM). However, in laboratory tests, minimum efficiency reporting value (MERV) 16 filters have proven to be highly efficient for capturing DPM and respirable dust. Also, MERV 16 filters can be less restrictive to cab airflow and less expensive than HEPA filters. To verify their effectiveness in the field, MERV 16 filters were used in the enclosed cab filtration system on a face drill and roof bolting mining machine and tested at an underground limestone mine. Test results showed that DPM and respirable dust concentrations were reduced by more than 90% when the cabs were properly sealed. However, when the cab door was opened periodically throughout the shift, the reduction efficiency of the MERV 16 filters was reduced to 80% on average.
Keywords
Mining-industry; Mining-equipment; Underground-mining; Respirable-dust; Ventilation; Ventilation-systems; Filters; Filtration; Air-filters; Air-quality; Particulate-dust; Particulates; Diesel-emissions; Diesel-exhausts; Engineering-controls; Control-technology; Dust-control; Dust-control-equipment
CODEN
MIENAB
Publication Date
20140201
Document Type
Journal Article
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M122014
Issue of Publication
2
ISSN
0026-5187
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
Mining Engineering
State
PA
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