... Upstream Oil & Gas initiation complex reservoir isrm international symposium fracture propagation injection hydraulic fracturing cohesive zone model fluid flow Modeling & Simulation propagation permeability fracture fracture mechanics asian rock mechanics symposium 29...

... how angle criteria capture fracture curving during growth. Figure 3. Crack path curving during interaction, only reproducible by fracture mechanics approaches that model propagation angles. (a) Coalescence of a fracture against another due to proximity, consistent with experiments by Thomas...

... typical rock cores. Despite the application of compressive loading the stresses at the crack tip are tensile and it causes tensile failure due to the opening mode (i.e. Mode I) of the crack propagation. The critical crack initiation parameter in linear elastic fracture mechanics is defined as the fracture...

... for slopes against the blocky-flexural toppling failure is proposed. In the proposed method with the use of fracture mechanics and combination of statistical and fuzzy methods has been tried to solve these problems. Finally a software is developed by using the proposed theory and a real case study has also...

... properties are summarized in this paper. Noticeable difference is shown in the test results between the three groups of marble specimens. Moreover, nonlinear fracture mechanics approach, capable of incorporating the effect of FPZ, is applied in this study. The cohesive crack model is chosen for describing...

... reservoir geomechanics hydraulic fracturing Reservoir Characterization Upstream Oil & Gas Fatehi Marji rock fracture mechanics crack tip element circular blast hole discontinuity method radial crack University Wellbore Design higher order displacement discontinuity method...

... Reservoir Characterization Upstream Oil & Gas energy release rate fluid pressure hydraulic fracturing Engineering crack length reservoir geomechanics fracture mechanics oil reservoir geometry crack propagation structural geology plastic deformation crack tip critical pressure...

...ISRM International Symposium 2008 5th Asian Rock Mechanics Symposium (ARMS5), 24-26 November 2008 Tehran, Iran 611 EFFECTS OF GEOSTRUCTURAL WEAKNESSES ON FLEXURAL TOPPLING FAILURE BASED ON PRINCIPLES OF SOLID AND FRACTURE MECHANICS Abbas Majdi1 and Mehdi Amini1 1School of Mining Engineering...

... techniques such as finite element and boundary element methods are commonly used to analysis engineering problems. These methods encounter mesh-related difficulties in dealing with fracture mechanics problems. To overcome these difficulties, a number of meshless methods have been developed in recent years...

... of joints, cracks, natural fractures, faults and other discontinuities. These cracks act as stress concentrators and hence can govern the fracture process. Therefore, for evaluating the failure behaviour of real rock structures, the use of more mechanistic methods like fracture mechanics approaches...