Creep Along Weak Planes in Roof and How It Affects Stability

Details

• Personal Author:
  Larson, Mark K. ; Wade, Ryan G.
• Description:
  Researchers at the National Institute for Occupational Safety and Health (NIOSH) are studying the time-dependent response of rock stressed along weakness planes. The objective is to improve mine safety by reducing the number of roof falls that cause injuries and fatalities to miners. Researchers conducted direct-shear tests on mudstone overcored from a coal mine roof. Results showed frictional strength weakens with displacement along the shearing planes. Results of direct-shear creep tests also showed timedependent deformation. Test measurements were compared to classical analytical models. Results suggest that risk of roof collapse may be decreased through layout and support design to reduce creep rates and thus slow progression toward failure. [Description provided by NIOSH]
• Subjects:
  Accident Prevention Accidents Coal Coal Mining Geology Mining Occupational Health Safety
• Keywords:
  Coal-mining; Mining-industry; Underground-mining; Geology; Roof-falls; Accident-prevention
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SRL - Spokane Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  8 pdf pages
• NIOSHTIC Number:
  nn:20022767
• Citation:
  Society for Mining Engineers Annual Meeting and Exhibition, Feb 29 - Mar 1, 2000, Salt Lake City, Utah. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2000 Feb; :
• Federal Fiscal Year:
  2000
• NORA Priority Area:
  Other Occupational Concerns
• Peer Reviewed:
  False
• Source Full Name:
  Society for Mining Engineers Annual Meeting and Exhibition, Feb 29 - Mar 1, 2000, Salt Lake City, Utah
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ae0cad8ecaa33e6519b470a6ececfdbda4c638a671fe80bb7f6b72652b3af58b0dca1bb90ee56ebf0ee0fe4057827d42dc33140ec9f87a5b3c7185a56faf9449
• Download URL:
  https://stacks.cdc.gov/view/cdc/236251/cdc_236251_DS1.pdf
• File Type:
  [PDF - 89.92 KB ]