Numerical Analysis on Orebodies Failure under Shear Loading

DOI

10.2991/meic-14.2014.58How to use a DOI?

Keywords

pillar; failure model; pillar size; microcrack; stress concentration

Abstract

Orebodies in shear often fail catastrophically. In this paper, the failure process of pillar in shear was studied numerically by the self-developed 2D Rock Failure Process Analysis code (abbreviated as RFPA2D). This work is focused on the appropriate pillar size for safe and economic extraction from orebodies under shear loading. Numerical simulation shows clearly that pillars of different angle and different width to height ratio under different confining pressure have different shear strength and show different failure model. With the increase of pillar angle, the junction of pillar and roof firstly appears stress concentration. It leads to the generation of micro cracks and makes pillar happen failure from surface to inner. Pillars in shear often fail due to reduced confinement and increased brittleness. This paper indicates that RFPA code is a viable tool for providing explanation for failure mechanisms of pillars and guidelines for shear stress consideration in pillar design for orebodies in shear.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Long Wang
AU  - Tianhui Ma
AU  - Wendong Zhang
PY  - 2014/11
DA  - 2014/11
TI  - Numerical Analysis on Orebodies Failure under Shear Loading
BT  - Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 260
EP  - 263
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-14.2014.58
DO  - 10.2991/meic-14.2014.58
ID  - Wang2014/11
ER  -