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Journal of Applied Sciences
Year: 2012  |  Volume: 12  |  Issue: 5  |  Page No.: 440 - 449

An Analytical Closed Form Solution Around Underground Openings Using Different Methods

O. Saeidi, A. Elyasi, S. Maleki and A. Fegh    

Abstract: This study presents a closed form solution around underground openings based on the four rock failure criteria. The results of the closed form solution are compared to the numerical method to establish the solution. The Tresca, Mohr-Coulomb, Mogi-Coulomb and generalized Hoek-Brown failure criteria are used to determine stress distribution and plastic zone around the circular space. The solutions are implemented in three dimensional distinct element code (3DEC) and assessed numerically. Also, the parametric study using these criteria is presented. Results show that the Tresca failure criterion does not fit in rock mass problems. Because of the employing axial stress, the Mogi-Coulomb failure criterion fitted the numerical results, appropriately. It was observed that increasing the axial stress using Mogi-Coulomb failure criterion decreases the stress distribution and the plastic zone, significantly.

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