University Of New South Wales Coal Pillar Strength Determinations For Australian And South African Mining Conditions; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design

Details

• Personal Author:
  Galvin, Jim M., PH.D. ; Hebblewhite, Bruce K., PH.D. ; Salamon, Miklos D. G., PH.D.
• Description:
  A series of mine design accidents in the late 1980s resulted in a major research program at the University of New South Wales, Australia, aimed at developing pillar and mine design guidelines. A database of both failed and unfailed Australian underground coal mine pillar case studies was compiled. A procedure was developed to enable the effective width of rectangular pillars to be taken into account. The database was analyzed statistically using the maximum likelihood method, both independently and as a combined data set with the more extensive South African database. Probabilities of failure were correlated to factors of safety. It was found that there was less than a 4% variance in pillar design extraction ratios resulting from each of these approaches. There is a remarkable consistency between the design formulas developed from back-analysis of the two separate national pillar databases containing many different coal seams and geological environments.
• Subjects:
  NIOSH
• Document Type:
  Text
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• NIOSHTIC Number:
  nn:20000207
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e2803428de3f0ab68cba8c65fc00e1938a758d22839033656d498ff0487c2be5f6960797df5b6c2995c148bcd5d451053aeee01a3458b6b44bfa6f012eba11b7
• Download URL:
  https://stacks.cdc.gov/view/cdc/8286/cdc_8286_DS1.pdf
• File Type:
  [PDF - 108.80 KB ]