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Optimizing Water Sprays for Dust Control on Longwall Shearer Faces.

Ruggieri-SK; Muldoon-TL; Schroeder-WE; Et Al
NTIS: PB 86-205408 :156 pages
Effective control of respirable dust is one of the most serious problems associated with longwall mining in the United States. The major reason is that face workers work in the airstream downwind of the major dust source--the longwall shearer cutting drum. The major approach to dust control has been the increased use of water sprays for dust suppression. These sprays, however, can make conditions worse by creating turbulence and mixing, which forces the dust cloud into the operator's breathing zone. The air upstream of the shearer is clean. If this flow could be divided with one split confining and carrying away the dust cloud and the second split blowing over the operators, their dust exposures would be reduced. This report describes the laboratory development and field evaluation of a system that accomplishes this airstream split. The system combines the use of barriers and water sprays to split the airflow and to confine the dust cloud in the dirty split in the face side of the shearer. The system, known as the shearer clearer, has shown a 50% reduction in shearer-generated dust measured at the operators.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 42A-86
NIOSH Division
Source Name
NTIS: PB 86-205408
Performing Organization
Foster-Miller, Inc.