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5.1 Introduction
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Introduction to Energy Geomechanics
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4.10 Further reading and
Contents
5
. Stresses on Faults and Fractures
Subsections
5
.
1
Introduction
5
.
2
Mapping of faults and fractures
5
.
2
.
1
Orientation of planes with respect to the geographical coordinate system
5
.
2
.
2
Stereonets for plotting fault orientation
5
.
2
.
3
Faults in geological maps
5
.
3
Frictional strength of faults and fault types
5
.
3
.
1
Fault strength
5
.
3
.
2
Normal faults
5
.
3
.
3
Thrust and reverse faults
5
.
3
.
4
Strike-slip faults
5
.
3
.
5
Stress and faulting regimes
5
.
3
.
6
Ideal orientation of faults
5
.
4
Determination of normal and shear stresses on the fault plane
5
.
4
.
1
Mohr's circle method
5
.
4
.
2
Tensor method
5
.
5
Applications
5
.
5
.
1
Critically stressed fractures and permeability
5
.
5
.
2
Determination of horizontal stresses assuming limit equilibrium
5
.
5
.
3
Determination of stress regime and horizontal stress direction from fault orientation
5
.
5
.
4
Fault reactivation
5
.
6
Problems
5
.
7
Further reading and references
