Noise abatement of pneumatic rock drill

Details

• Personal Author:
  Murphy, John N. ; Summers, Charles R.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "In response to the Coal Mine Health and Safety Act of 1969, mandatory noise standards have been developed that specify time- noise limits of mine personnel exposure. Most affected by elevated noise levels is the pneumatic roof bolter operator, both in terms of levels near or in excess of 115 dba and in terms of length of exposure. Therefore, the principal emphasis of this Bureau of Mines report is on pneumatic drill noise control. It is not the intent of this report to suggest any drill redesign
  
  instead, methods are suggested to reduce the noise level by complementing existing machines. An integral muffler system and a separate muffler system were tested in an attempt to lower pneumatic drill noise levels. Pneumatic drills, when new, operate at about 115 dba when drilling in sandstone. Using the drill muffler systems, it was possible to decrease the noise level of a 115-dba stope drill to approximately 100 dba." - NIOSHTIC-2
  
  NIOSH no. 10000217
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  45 numbered pages
• NIOSHTIC Number:
  nn:10000217
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0544114b606d76248f939fbcc0915d2e180c2fbbb87f82141e2aaca6e565613794208661eeef2691048631bb51dbc413bf735ef919c738b414886564e9bb5d48
• Download URL:
  https://stacks.cdc.gov/view/cdc/9233/cdc_9233_DS1.pdf
• File Type:
  [PDF - 5.70 MB ]