منابع مشابه
Tertiary Low-angle Faulting and Related Gold and Copper Mineralization on Mount Washington, Vancouver Island
The structural style of Vancouver Island, ar perceived by thr author in the course of reconni!issance mapping for the Geological Survey of Canada. 1963 to 1981. was one of rather rigid tilted blocks. separated by numerous high-angle faults. That concept has now been shown to be incomplete and in need of revision. Firstly. deep seismic soundings carried out in I984 under the LITHOPROBE program. ...
متن کاملPolymodal faulting: Time for a new angle on shear failure
Conjugate, or bimodal, fault patterns dominate the geological literature on shear failure. Based on Anderson's (1905) application of the Mohr-Coulomb failure criterion, these patterns have been interpreted from all tectonic regimes, including normal, strike-slip and thrust (reverse) faulting. However, a fundamental limitation of the Mohr-Coulomb failure criterion e and others that assume faults...
متن کاملNumerical Investigation of Effect of Rock Bolt Angle on Shear Behavior of Rock Bridges
In this work, the effect of rock bolt angle on the shear behavior of Rock Bridges is investigated using the particle flow code in two dimensions (PFC2D) for three different Rock Bridge lengths. Firstly, the calibration of PF2D is performed to reproduce the gypsum sample. Then the numerical models with the dimensions of 100 mm * 100 mm are prepared. The Rock Bridge is created in the middle of th...
متن کاملEffects of Weak Layer Angle and Thickness on the Stability of Rock Slopes
This paper researches two key factors (angle and thickness) of a weak layer in relation to their influencing mechanism on slope stability. It puts forward the sliding surface angle and morphological model criteria for the control of rock slopes and realization of its failure mechanism. By comparing the Failure Modes and Safety Factors (Fs) obtained from numerical analysis, the influence pattern...
متن کاملRelationship between fracture dip angle, aperture and fluid flow in the fractured rock masses
Most of the Earth's crust contains fluids, and fractures are common throughout the upper part. They exist at a wide range of scales from micro-fractures within grains to major faults and shear zones that traverse the crust. In this paper, the stress-dependent permeability in fractured rock masses have been investigated considering the effects of nonlinear normal deformation and shear dilation o...
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ژورنال
عنوان ژورنال: Nature
سال: 1962
ISSN: 0028-0836,1476-4687
DOI: 10.1038/194646a0