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Noise Study of Longwwall Mining Systems.

Authors
Pettit-MR; Slone-RM
Source
NTIS: PB/87-102257 :169 pages
Link
NIOSHTIC No.
10005377
Abstract
An investigation was conducted to identify and promote the application of noise control technology to future longwall mining machinery. Intensive noise and vibration data were acquired on a typical longwall shearing machine, and the highest noise levels were shown to radiate from the cutter drums. Shearing machine cutter drum noise control techniques that take advantage of the nature of the dynamic forces generated during coal cutting were developed. These include both structural redesign and force isolation techniques. A reduced noise cutter drum was developed that achieved a 5- to 6-dba system noise reduction at the operator's position. Its operational performance was verified by a 6-month-long in-mine test. It was evident from the data that additional noise reduction could be achieved by treatment of the shearing machine hydraulics. Noise control of secondary sources was also investigated. A method of reducing full or empty stage conveyor noise (and continuous miner conveyor noise) by 5 to 10 dba was demonstrated through isolation techniques. Underground mine durability testing, however, is yet to be demonstrated.
Publication Date
19860101
Document Type
CP; Final Contract Report;
Fiscal Year
1986
NTIS Accession No.
PB87-102257
NTIS Price
A09
Identifying No.
OFR 48-86
NIOSH Division
PRC;
Source Name
NTIS: PB/87-102257
Performing Organization
Wyle Laboratories
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