The post-failure characteristics of rock. Pt2: Application to coal and coal pillars

CIM Vancouver 2002
Tim Grain Joseph,
Abstract The strain softening relationship developed in
part 1 is then applied to coal. Having determined
the post failure stress-strain curve for coal
specimens, this information can then be used in a
finite element program, such as Phase 2, to
examine the post failure characteristics of coal
pillars. Using example data, the strength of coal
pillars of different width/height ratios are
estimated and compared with well-known empirical
pillar size-strength relationships. In addition,
the post-failure stress-strain behaviour of a coal
pillar is compared with an empirical relationship
reported in the
Keywords: Pillars, Coal, Post-failure behaviour
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