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Mining Publication: Estimated Sound Power Radiated by Surfaces on a Continuous Miner Tail Section Using Vibration Measurements
Keywords: Continuous miners Noise and vibration control Sound power level
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: June 2003
Authors: DS Yantek
Conference Paper - June 2003
Download PDF Document (1.16 MB)
NIOSHTIC2 Number: 20026389
NOISE-CON 2003. Ames, IA: Institute of Noise Control Engineering of the USA, 2003 Jun; :1-9
Miners in underground coal mines experience prolonged exposure to high noise levels, often with A-weighted sound levels in excess of 90 dB. Field tests have shown that the continuous miner conveyor is a dominant noise source. This paper will identify the most significant noise-radiating surfaces on the continuous miner tail section using vibration levels and surface areas to estimate the sound power levels of each surface. In addition, using five test cases, this study will examine the effects of three engineering noise controls on the surface-averaged vibration levels and average sound levels measured with four microphones located two meters from the tail section. The noise-radiating surfaces of the conveyor's tail section include the top and bottom decks, the sideboards, and the flex plates. Emphasis is placed on the changes in the estimated sound power levels in the 500-2500 Hz 1/3-octave bands since this frequency range accounts for 80-85% of the sound energy near the tail section. The results show that the bottom deck is the most significant noise radiator for the untreated miner. Installing a coated bottom deck reduces the estimated sound power level radiated from the bottom deck by 11 dB and the average sound level by 2 dB. Using a coated tail roller results in reductions of the estimated sound power levels for individual components from 1 to 4 dB and reduces the average sound level by 2 dB. Coating the slide plate has little effect on both the estimated radiated sound power levels and the average sound level. The test results indicate that modifications that reduce flex plate vibration and reduce energy transfer from the tail roller into the tail section will be effective in reducing noise when combined with a coated tail roller and coated return deck.
Image of publication Estimated Sound Power Radiated by Surfaces on a Continuous Miner Tail Section Using Vibration MeasurementsConference Paper - June 2003
Download PDF Document (1.16 MB)
NIOSHTIC2 Number: 20026389
NOISE-CON 2003. Ames, IA: Institute of Noise Control Engineering of the USA, 2003 Jun; :1-9
See Also
Analysis of a Mechanism Suspension to Reduce Noise from Horizontal Vibrating Screens
Application of Phased Array Technology for Identification of Low Frequency Noise Sources
Determining Underground Roof Bolting Machine Operators Noise Exposure Using Laboratory Results
A Dual Sprocket Chain as a Noise Control for a Continuous Mining Machine
Modified Tail Section Reduces Noise on a Continuous Mining Machine
A Noise Control for A Roof Bolting Machine: Collapsible Drill Steel Enclosure
Noise Reduction of Continuous Miner Scrubber Fan System
Sound Power Level Study of a Roof Bolter
A Technique for Estimating the Sound Power Level Radiated by Pneumatic Rock Drills and the Evaluation of a CSIR Prototype Rock Drill with Engineering Noise Controls
Technology News 539 - Identifying The Benefits Of Engineering Noise Controls Through A Business Case
Page last reviewed: November 17, 2015
Page last updated: November 17, 2015
Content source: National Institute for Occupational Safety and Health, Mining Program
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