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- W2108472932 abstract "A numerical modelling approach was developed to explicitly simulate geome- chanical characteristics of intact rock: mineralogy, grain size and fabric. The approach involved creating a representative constitutive model for each of three common rock-forming minerals: mica, quartz and feldspar. The constitutive models developed are valid within the low confine- ment realm of excavation boundaries, where tensile fracture processes dominate. The mineral types were assigned to numerical elements, which were associated with each other through an algorithm created in a finite difference model, FLAC 2D (Itasca 2007a), to simulate real crystal geometries and orientations. The numerical models were used in a parametric investigation of the geomechanical characteristics and compared with published observations of the rock yield- ing process in laboratory testing. This approach has allowed the explicit grain-scale investiga- tion of the impact of geomechanical characteristics on rock yielding at low confinement, leading to an improved mechanistic understanding of excavation-scale rock yielding processes at exca- vation boundaries." @default.
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- W2108472932 date "2009-01-01" @default.
- W2108472932 modified "2023-09-27" @default.
- W2108472932 title "Constitutive Model for Numerical Modelling of Highly Stressed Heterogeneous Massive Rocks at Excavation Boundaries" @default.
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