Various structural discontinuities, which form a discrete fracture network, play a significant role in the failure conditions and stability of the rock masses around underground excavations. Several continuum numerical methods have been used to study the stability of underground excavations in jointed rock masses but only few of them can take into account the influence of the pre-existing natur...

This paper summarises two approaches, Dual Flow Nets (DFN) and Object Petri Nets (OPN), and offers a translation mechanism between them. While the DFN model tackles the separation of control and data flow computing aspects, the OPN model has a more generalised structure. The aim of this paper is to show how the modelling based on control/data-flow analysis can benefit from an object-based Petri...

In geological media, the large variety and complex configurations of fractured networks make it difficult to describe them precisely. A relevant approach is to model them as Discrete Fracture Networks (DFN)[10, 19], with statistical properties in agreement with in situ experiments [15, 13, 14]. A DFN is a 3D domain made of 2D fractures intersecting each other. Steady state flow in DFN is consid...

FRACK is a fractured media freeware flow and solute transport suite currently under development that is intended to serve as both a preand post-processor to MODFLOW. As a pre-processor, FRACK generates and maps networks of deterministic and/or stochastic fractures onto a regularly-spaced finitedifference grid, according to a fracture continuum method that closely approximates flow solutions to ...

Field-scale properties of fractured rocks play crucial role in many subsurface applications, yet methodologies for identification the statistical parameters a discrete fracture network (DFN) are scarce. We present an inversion technique to infer two such parameters, density and fractal dimension, from cross-borehole thermal experiments data. It is based on particle-based heat-transfer model, wh...

many large oil and gas fields in the most productive world regions happen to be fractured. the exploration and development of these reservoirs is a true challenge for many operators. these difficulties are due to uncertainties in geological fracture properties such as aperture, length, connectivity and intensity distribution. to successfully address these challenges, it is paramount to improve ...

Abstract In several applications concerning underground flow simulations in fractured media, the rock matrix is modeled by means of Discrete Fracture Network (DFN) model. The fractures are typically described through stochastic parameters sampled from known distributions. this framework, it worth considering application suitable complexity reduction techniques, also view possible uncertainty qu...