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Mining Publication: Development of Roof-Bolting Machine Bit and Chuck Isolators for Drilling Noise Reductions
Keywords: Bolters Drills Mechanical isolation Noise Sound level
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: November 2009
Authors: JS Peterson, PG Kovalchik, DS Yantek
Conference Paper - November 2009
Download PDF Document (0.36 MB)
NIOSHTIC2 Number: 20036269
Proceedings of the ASME 2009 International Mechanical Engineering Congress & Exposition, IMECE2009, November 13-19, Lake Buena Vista, Florida. IMECE2009-11226, New York: American Society of Mechanical Engineers, 2009; :1-8
Among underground coal miners, hearing loss remains one of the most common occupational illnesses. In response, the National Institute for Occupational Safety and Health (NIOSH) conducts research to reduce the noise emission of various underground coal mining equipment, an example of which is a roof bolting machine (RBM). After the removal of coal or rock, the remaining strata may be subject to fall, either from overhead (the roof) or from the side (the rib). One method used in underground coal-mines to prevent failures requires the installation of roof bolts. The roof bolting machine operator trams the machine to the required location, drills a hole into the strata, and then installs a roof bolt, supporting the roof or the rib, as the case may be. Field studies support the premise that, on average, drilling noise is the loudest noise that a roof bolting machine operator would be exposed to and contributes significantly to the operators' noise exposure. NIOSH has determined that the drill steel radiates a significant amount of noise during drilling. NIOSH is developing bit and chuck isolators to reduce vibration, and thus noise radiation of the drill steel, with the longer-term goal of reducing roof bolting machine operator noise exposure. Laboratory testing has shown that operator ear sound pressure levels may be reduced by 3 to 7 dB(A), depending upon the test configuration and drilling media.
Image of publication Development of Roof-Bolting Machine Bit and Chuck Isolators for Drilling Noise ReductionsConference Paper - November 2009
Download PDF Document (0.36 MB)
NIOSHTIC2 Number: 20036269
Proceedings of the ASME 2009 International Mechanical Engineering Congress & Exposition, IMECE2009, November 13-19, Lake Buena Vista, Florida. IMECE2009-11226, New York: American Society of Mechanical Engineers, 2009; :1-8
See Also
Determination of Sound Exposures (DOSES): Software Manual and Implementation Guide
The Evolution of Drill Bit and Chuck Isolators to Reduce Roof Bolting Machine Drilling Noise
Less Sound Underground: Reducing Roof Bolting Machine Drilling Noise
Noise Assessment of Stone/Aggregate Mines: Six Case Studies
A Noise Control for A Roof Bolting Machine: Collapsible Drill Steel Enclosure
Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
Sound Power Level Study of a Roof Bolter
Sound Restoration Hearing Protection: Genesis of a Standard Test Method
Technology News 536 - NIOSH Develops New Software to Analyze and Reduce Noise Exposure
What Does a Hearing Loss Sound Like?
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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