ABSTRACT

ABSTRACT

Reef and concrete stabilising pillars are modelled in the two dimensional plane strain code FLAC. The rock mechanics criteria used for comparison are hangingwall stability, pillar stress distribution and stope closure profile, as well as the punching effect of the pillar into the foundation. Foundation failure is qualitatively the same as that shown by Wagner and Schumann (1971). Results show that hangingwall stability may be promoted, and the punching effect much reduced, by the use of a concrete pillar, thus making the use of a concrete pillar justified.

Keywords:
reservoir geomechanics, Wellbore Design, pillar edge, punching effect, hangingwall, MPa, closure, concrete pillar, pillar, Reservoir Characterization
Subjects:
Wellbore Design, Reservoir Characterization, Rock properties, Reservoir geomechanics
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1994. A.A. Balkema - Permission to Distribute - American Rock Mechanics Association
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