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Noise Reduction of Conveyors Used in Underground Coal Mining Machinery.

Authors
Huggins-GG; Remington-PJ
Source
NTIS: PB/267-787 Available for Reference At Bureau Libraries :132 pages
Link
NIOSHTIC No.
10000186
Abstract
Discussions are presented of the three phases of the noise reduction program on flight-type coal conveyors. The three phases are identification of noise sources, evaluation of potential noise reduction concepts, and implementation of noise reduction, which is intended to reduce conveyor noise to less than 90 dba in the underground mining environment. The major noise sources are impacts of the chain on the tail roller and on the top and bottom decks. A total noise reduction of 11 dba was achieved by using techniques which are applicable to retrofit. These are a vibration isolated tail roller and an isolated wear strip on the return deck. A theoretical model of isolation provided by the isolated tail roller is developed. Appendices are presented that contain information on other potential concepts and additional data generated.
Publication Date
19760101
Document Type
CP; Final Contract Report;
Fiscal Year
1976
NTIS Accession No.
PB-267787
NTIS Price
A08
Identifying No.
OFR 109-77
NIOSH Division
PRC;
Source Name
NTIS: PB/267-787 Available for Reference At Bureau Libraries
Performing Organization
Bolt, Beranek and Newman Inc
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