Polyaxial stress-dependent permeability of a three-dimensional fractured rock layer

Upscaling of Permeability Field of Fractured Rock System: Numerical Examples

When the permeability field of a given porous medium domain is heterogeneous by the existence of randomly distributed fractures such that numerical investigation becomes cumbersome, another level of upscaling may be required. That is such complex permeability field could be relaxed i.e., smoothed by constructing an effective permeability field. The effective permeability field is an approximati...

Permeability Estimation from Velocity Anisotropy in Fractured Rock

Cracks in a rock mass subjected to a uniaxial stress will be preferentially closed depending on the angle between the fracture normal and the direction of the applied stress. If the prestress fracture distribution is isotropic, the effective elastic properties of such a material are then transversely isotropic due to the preferred alignment of the cracks. Velocity measurements in multiple direc...

Three Dimensional Stochastic Modeling of Conductivity Fields in a Fractured Rock Medium

1. Abstract Modeling flow and transport in a fractured rock formation requires in many instances an explicit representation of fractures. In such cases discrete fracture models do not always work properly because of the difficulty to be calibrated and the lack of flexibility to be adapted, in an automated calibration process, when the description of fracture locations is not accurate enough. In...

Three - dimensional behaviour of a prototype radioactive 1 waste repository in fractured granitic rock

A model for estimation of stress-dependent deformation modulus of rock mass

Deformation modulus of rock mass has a significant role in the support design of an underground excavation. It is determined by expensive in-situ tests or by empirical models. Existing models for estimation of deformation modulus do not consider its stress dependence. Herein, data from several sources is used to develop a stress- (depth-) dependent relation for estimation of deformation modulus...