Welcome to CDC Stacks | 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 - 8286 | National Institute for Occupational Safety and Health
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
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
  • Published Date:
    5/1/1999
Filetype[PDF - 108.80 KB]


Details:
  • 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.

  • Supporting Files:
    No Additional Files