... obvious effect on Figure 4. The seepage coefficient and fissure water pressure. fracture. Net confining pressure increases to a certain degree, the reliance of permeability coefficient to the fissure water pressure decrease sharply. 2.4 Relations between axial strain and seepage The combined action...

..., the plasticity of anchored model specimen was significantly enhanced, and anchored model specimen can bear greater axial strain. The anti-pulling force test analysis was made for the fatigue damage process of anchored model specimen in three stages. During the first and second stages of fatigue damage process...

... pressure, ?u, and the axial strain, ?a, are shown for repeated cycles of axial loading/unloading under the undrained condition and isotropic consolidation under the constant effective stress, ? c. The residual axial strain after the isotropic consolidation following the i-th cycle of axial loading...

... Upstream Oil & Gas axial stress crack closure rock type Reservoir Characterization relation volumetric strain initiation lateral strain structural geology failure criteria deviation mean value Eberhardt crack initiation crack damage strain axial strain deformation parameter...

... reservoir geomechanics strength axial strain radial strain different temperature structural geology volumetric strain loading orientation MPa Tournemire shale Reservoir Characterization orientation anisotropic rock investigation mechanical behaviour bedding plane Upstream Oil...

... structural geology shear strain characteristic Engineering axial strain Reservoir Characterization constitutive equation Upstream Oil & Gas strain tensor stress-strain relationship elastic-plastic theory strain space triaxial test soft rock consolidation pressure mechanics...