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Keywords: shear fracture
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Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-491
...1. INTRODUCTION Shear dilatation is recognized as a mechanism that can enhance permeability of fluid-driven shear fractures. In contrast to the conventional tensile or opening mode fractures in which the fracture is kept open by an internal pressure that exceeds the minimum stress, the coupling...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1177
... 35' to 01. Shear localization via narrow cataclastic zones in BDT ex- hibit: (4) pervasive matrix microfracturing in BDT as opposed to microfracture 'halo' around brittle shear fractures, and (5) strong microfracture orientation parallel to 01 in BDT away from narrow cataclastic zones instead of more...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1833
... and to predict the occurrence of a rock failure shock or instability. Lockner and Byerlee (1992), for example, draw upon laboratory results concerning the nucleation and growth of shear fractures in brittle rock. With AE monitoring, they have tracked the fault growth in granite sample, and have used...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1145
... involving shear fracture has played a very important role in the areas of mining, civil engineering, geology and geological engineering. In this study, a shear fracture device has been constructed, analyzed and used to create the shear fracture of brittle rock. Many researchers have investigated...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1611
... boundary from turning the macrocrack into a shear fracture. 1 INTRODUCTION Rock splitting in uniaxial compression tests is usually attributed to uniform loading conditions and is associated with high rock brittleness. On the other hand, shear (oblique) fracture is supposed to be indicative...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0775
... in a brittle shear fracture generate a P-wave anisotropy and a lateral shear wave birefringence in both the elastic and dilatant phases of loading. Post-failure sliding along the shear fracture does not result in changes in anisotropy. Triaxial tests at high confining pressure generate ductile yielding...

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