Numerical simulation of yield pillar behavior with creep material model

Chen, G. ; Sun, C.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 4
Publication Date: Jan 1, 2000
In this study, numerical simulations of yield pillars employing the finite-element method with a time-dependent Drucker-Prager material model are conducted. The stress¬control mechanism of yield pillars on weak floor strata is studied. The development of a pillar yield zone, the distribution of pillar stress and the development of a failure zone in the weak floor strata are investigated. The study indicates that a properly selected yield pillar size may significantly reduce the peak stress induced in the weak floor strata and may effectively control the development of a failure zone in the floor.
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