Journal: Springer Series in Geomechanics and Geoengineering

Abbreviation

Publisher

Springer

Journal Volumes

ISSN

Description

Filters

2011 - 20194
Reset filters

Search Results

Publications 1 - 4 of 4
  • Influence of Weak Layer Heterogeneity on Slab Avalanche Release Using a Finite Element Method
    Item type: Conference Paper
    Gaume, Johan; Chambon, Guillaume; Naaim, Mohamed; et al. (2011)
    Springer Series in Geomechanics and Geoengineering ~ Advances in Bifurcation and Degradation in Geomaterials
    Snow avalanches generally result from the collapse of a weak layer underlaying a cohesive slab. We use the finite element code Cast3m to build a complete mechanical model of the weak layer-slab system including inertial effects. We model the weak layer as a strain-softening interface whose properties are spatially heterogeneous. The softening accounts for the breaking of ice bridges. The overlying slab is represented by a Drucker-Prager elasto-plastic model, with post-peak softening to model the crack opening. The two key ingredients for the mechanical description of avalanches releases are the heterogeneity of the weak layer and the redistribution of stresses by elasticity of the slab. The heterogeneity is modeled through a Gaussian stochastic distribution of the friction angle with spatial correlations. We first study the effect of the weak layers heterogeneity and the slab depth on the release on a simple uniform slope geometry. We observe two releases types, full slope releases corresponding to a crown rupture and partial slope releases for which the traction rupture occurs inside the slope and thus only a part of the slope is released. The influence of slab depth on the relative proportion of these two rupture types, as well as on the avalanche angle distributions is also studied.
  • Deep Fracture Zone Reactivation During CO2 Storage at In Salah (Algeria) - A Review of Recent Modeling Studies
    Item type: Conference Paper
    Rinaldi, Antonio Pio; Rutqvist, Jonny; Vilarrasa, Victor (2019)
    Springer Series in Geomechanics and Geoengineering ~ Energy Geotechnics: SEG-2018
    We present a review of numerical studies aimed at understanding the conditions leading to the reactivation of a deep fracture zone, as well as thermal effects, at the In Salah CO2 Storage Project. Numerical simulations carried out with the TOUGH-FLAC coupled fluid flow and geomechanics simulator show that a deep fracture opening can explain the observed deformation at the ground surface. Accounting for a fractured reservoir with stress-dependent permeability allows for a better match of the recorded wellhead pressure. Simulation results including thermal effects show that cooling becomes more significant for longterm storage, causing a decrease in fracture stability.
  • Autonomous Decision-Making Against Induced Seismicity in Deep Fluid Injections
    Item type: Conference Paper
    Mignan, Arnaud; Broccardo, Marco; Wiemer, Stefan; et al. (2019)
    Springer Series in Geomechanics and Geoengineering ~ Energy Geotechnics: SEG-2018
  • Lattice- Boltzmann method for geophysical plastic flows
    Item type: Book Chapter
    Leonardi, Alessandro; Wittel, Falk K.; Mendoza, Miller; et al. (2015)
    Springer Series in Geomechanics and Geoengineering ~ Recent Advances in Modeling Landslides and Debris Flows
Publications 1 - 4 of 4