Design of Primary Roof Support Systems in U.S. Coal Mines Based on the Analysis of Roof Fall Rates

Details

• Journal Article:
  Proceedings of the Fourth International Symposium on Roof Bolting in Mining
• Personal Author:
  Dolinar, Dennis R. ; Mark, Christopher ; Molinda, Gregory M.
• Description:
  Each year, about 2,000 falls of supported roof occur in the more than 800 underground U.S. coal mines. Therefore, to help improve the design of primary support systems, the National Institute for Occupational Safety and Health (NIOSH) conducted a nationwide study of roof falls in over 2,500 km of roadways at 37 coal mines. Information on the roof falls as well as other geotechnical, mining, geologic and roof bolting factors were collected and quantified. Then a multi variate statistical analysis was conducted on the data with the roof fall rate being the outcome variable. The results were used to derive preliminary design guidelines for predicting the roof bolt length, capacity, and pattern required to effectively reduce the roof fall rate. The equations are fairly limited by a relatively high statistical variance in the data. Also reported is a recent survey of U.S. roof bolt manufacturers that shows a significant change in bolt types used over the last ten years. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Mining Occupational Health Safety
• Keywords:
  Coal mining; Mining industry; Underground mining; Roof control; Ground control
• Source:
  Proceedings of the Fourth International Symposium on Roof Bolting in Mining. Martens PN ed. Aachen, Germany: Druckerei Mainz GmbH, 2001 Jan; :235-252
• Series:
  Mining Publications
• ISBN:
  2860739212
• Publisher:
  Druckerei Mainz GmbH
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  18 pdf pages
• NIOSHTIC Number:
  nn:20021291
• Contact Point Address:
  Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
• Editor(s):
  Martens PN
• Federal Fiscal Year:
  2001
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:68e111a41b3fd135890e2feef8d8053cd427fe600c49a80530cabdc24deeb7b451c29d769eb105829ffdfc28b08b34b638c16c05570ad7fd8165f33148c5c5a4
• Download URL:
  https://stacks.cdc.gov/view/cdc/8673/cdc_8673_DS1.pdf
• File Type:
  [PDF - 663.65 KB ]