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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/1472

Title: Implementation of a flaw model to the fracturing around a vertical shaft
Authors: Van de Steen, B
Vervoort, A
Napier, JAL
Durrheim, RJ
Keywords: Fracture mechanics
Numerical simulation
Shaft excavations
Boundary elements
Issue Date: Apr-2003
Publisher: Springer-Verlag Wien
Citation: Van de Steen, B, et al. 2003. Implementation of a flaw model to the fracturing around a vertical shaft. Rock mechanics and rock engineering, vol 36(2), pp 143-161
Abstract: This paper investigates whether a micromechanical model developed to investigate the relation between the basic failure processes at grain-scale and the macroscopic failure pattern can be applied to model the fracturing around large-scale excavations. The simulated fracture pattern around a vertical shaft is compared to the fracturing around a shaft at a depth of 3400 m. The simulations suggest that wedge-shaped zones, called dog-ears, a reformed by a progressive splitting-like failure of the rock. The fractures forming these slabs nucleate in the zones subjected to the highest compressive stresses. Both shear and tensile mechanisms are responsible for the fracturing. The dog-ears deepen and widen as spalling continues.
URI: http://hdl.handle.net/10204/1472
ISSN: 0723-2632
Appears in Collections:Mining and geoscience
General science, engineering & technology

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