A Unique Approach to Determining the Time Dependent In Situ Strength of Coal Pillars [1999/03]

Details

• Personal Author:
  Biswas, Kousick ; Mark C ; Peng SS
• Description:
  In general, it cannot be assumed that the strength of coal pillars remains constant over long time periods. Field observations indicate that a coal seam, especially when it contains a parting layer, deteriorates over time, reducing load-bearing capacity of the pillars. This paper discusses a unique approach to determine the time dependent strength of coal pillars in the field. Three coal pillars that were developed 5, 15 and 50 years ago were chosen for the study. Holes were drilled in coal and parting layers in each pillar and the strength profiles were determined for each hole using the Borehole Penetrometer. The strength data were treated statistically to establish time dependent strength equations for different layers. The results can be used to help estimate the loss of pillar capacity over time. [Description provided by NIOSH]
• Subjects:
  Air Movements Dust Hazardous Substances Manufacturing And Industrial Facilities Mining Occupational Health Safety Ventilation
• Keywords:
  Extended-cut-mining Ground-control Ground-stability Longwall-mining Mining-industry Room-and-pillar-mining Statistical-analysis Underground-mining
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; OSHA Region 3 ; OSHA Region 8 ; Pennsylvania ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-7
• NIOSHTIC Number:
  nn:20027592
• Citation:
  1999 SME Annual Meeting, March 1-3, 1999, Denver, Colorado, preprint 99-184. Littleton, CO: Society for Mining, Metallurgy, and Exploration, 1999 Mar; :1-7
• Federal Fiscal Year:
  1999
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3c6781c359aa6b59300668329e530782f0e42ade124da3d7d993b7aa602a7283ab265434550c9ecab5aad75e47e6d6ab8f6693bd7b62a2e1189cffbccbc434af
• Download URL:
  https://stacks.cdc.gov/view/cdc/221046/cdc_221046_DS1.pdf
• File Type:
  [PDF - 792.30 KB ]