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Mining Publication: Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
Keywords: Bolters Dosimeters Noise Noise and vibration control Sound level
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: October 2007
Authors: JS Peterson, LA Alcorn
Conference Paper - October 2007
Download PDF Document (0.34 MB)
NIOSHTIC2 Number: 20032796
NOISE-CON 2007, Reno, Nevada, October 22-24, 2007. Burroughs C; Hambric S; Conlon S; Maling G, eds., Ames, IA: Institute of Noise Control Engineering of the USA, 2007; :1-10
Data collected by the Mine Safety and Health Administration (MSHA) has shown that roof bolting machine (RBM) operators are the second most likely type of underground mining machine operator to be are over exposed to noise, per the MSHA Permissible Exposure Limit. In response to this, the Pittsburgh Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) has initiated a project to develop engineering noise controls for roof bolting machines. Key to this research is an evaluation of the duty cycle of a typical roof bolting machine operation and this paper presents the results of such an exercise for data collected at two cooperating coal mines. The evaluation entails a time motion study of an operators’ shift, logging each activity for time (e.g., tramming the machine, drilling holes, installing the roof bolt, etc.) and the noise levels associated with each task with a Larson Davis Spark 705+ dosimeter. NIOSH post processed the data to determine which tasks the operator devotes the most time to and the noise dosage accumulated during those tasks. These results provide insight into which portion of the operators’ duty cycle is the most prominent contributor to noise exposure and thus, where research activities for the development of engineering noise controls should be focused. It was determined that the task of drilling holes is the most significant source of the operators’ noise exposure and project research has focused on engineering noise controls to reduce the noise emissions generated during the drilling portion of the machine duty cycle.
Image of publication Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty CycleConference Paper - October 2007
Download PDF Document (0.34 MB)
NIOSHTIC2 Number: 20032796
NOISE-CON 2007, Reno, Nevada, October 22-24, 2007. Burroughs C; Hambric S; Conlon S; Maling G, eds., Ames, IA: Institute of Noise Control Engineering of the USA, 2007; :1-10
See Also
Analysis of a Mechanism Suspension to Reduce Noise from Horizontal Vibrating Screens
Determination of Sound Exposures (DOSES): Software Manual and Implementation Guide
Development of Roof-Bolting Machine Bit and Chuck Isolators for Drilling Noise Reductions
Heavy Construction Equipment Noise Study Using Dosimetry and Time-Motion Studies
Less Sound Underground: Reducing Roof Bolting Machine Drilling Noise
Mining Haul Truck Cab Noise: An Evaluation of Three Acoustical Environments
A Noise Control for A Roof Bolting Machine: Collapsible Drill Steel Enclosure
Practical Application of a Partial Cab to Reduce the A-Weighted Sound Level at the Operator's Station on Surface Drill Rigs
Technology News 536 - NIOSH Develops New Software to Analyze and Reduce Noise Exposure
Water Well Safety Bits: Health And Safety Information For The Water Well Industry
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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