PPT On ROCK SLOPE ENGINEERING
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Rock mass is a non-homogeneous, anisotropic and discontinuous medium ; often it is a pre-stressed mass
2. ROCK MECHANICS
Rock mechanics is defined as “ the theoretical and applied science of mechanical behavior of rock; it is that branch of mechanics concerned with the response of rock to the force field of its physical environment “
- As per ASEG (American Society of Engineering Geology )
3. Applications of Rock Mechanics
Rock mechanics is primarily applied in
Civil Engineering
Mining Engineering
Petroleum Engineering
4. CIVIL ENGINEERING APPLICATIONS
The Civil Engineer is mainly concerned with
Competency of the rock mass to carry the loads of the structures built on it
Stability of the excavations undertaken involving a rock mass, whether surface or underground
5. STRENGTH OF ROCK
Rock should be classified and its strength to be assessed in its simple state of existence i.e unconfined condition
Rock can be either “intact “ or “ jointed”
Parameters for assessing the rock strength/stability
In-situ stress/confining conditions
Environmental factors eg. seepage pressure etc.
6. INTACT ROCK Vs ROCK MASS
INTACT ROCK No through going fractures
ROCK MASS Intact rock + Discontinuities
7. INTACT ROCK Vs ROCK MASS (Contd.)
Discontinuity
Joints
Fractures
Faults
Shear zones
Makes the rock discontinuous
Makes the rock anisotropic
Makes the rock stress dependent
8. FACTORS AFFECTING ROCK STRENGTH
Nature of discontinuities
Location of discontinuities
Orientation of discontinuities
Deformability
Strength
Permeability
9. ROCK MASS DESCRIPTION
MASSIVE ROCK Rock mass with few discontinuities Excavation dimension < discontinuity spacing BLOCKY/JOINTED ROCK Rock mass with moderate number of discontinuities Excavation dimension > discontinuity spacing
HEAVILY JOINTED ROCK Rock mass with a large number of discontinuities Excavation dimension >> discontinuity spacing
10. Thank You.
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ROCK SLOPE ENGINEERING Presentation Transcript:
1. ROCK MASSRock mass is a non-homogeneous, anisotropic and discontinuous medium ; often it is a pre-stressed mass
2. ROCK MECHANICS
Rock mechanics is defined as “ the theoretical and applied science of mechanical behavior of rock; it is that branch of mechanics concerned with the response of rock to the force field of its physical environment “
- As per ASEG (American Society of Engineering Geology )
3. Applications of Rock Mechanics
Rock mechanics is primarily applied in
Civil Engineering
Mining Engineering
Petroleum Engineering
4. CIVIL ENGINEERING APPLICATIONS
The Civil Engineer is mainly concerned with
Competency of the rock mass to carry the loads of the structures built on it
Stability of the excavations undertaken involving a rock mass, whether surface or underground
5. STRENGTH OF ROCK
Rock should be classified and its strength to be assessed in its simple state of existence i.e unconfined condition
Rock can be either “intact “ or “ jointed”
Parameters for assessing the rock strength/stability
In-situ stress/confining conditions
Environmental factors eg. seepage pressure etc.
6. INTACT ROCK Vs ROCK MASS
INTACT ROCK No through going fractures
ROCK MASS Intact rock + Discontinuities
7. INTACT ROCK Vs ROCK MASS (Contd.)
Discontinuity
Joints
Fractures
Faults
Shear zones
Makes the rock discontinuous
Makes the rock anisotropic
Makes the rock stress dependent
8. FACTORS AFFECTING ROCK STRENGTH
Nature of discontinuities
Location of discontinuities
Orientation of discontinuities
Deformability
Strength
Permeability
9. ROCK MASS DESCRIPTION
MASSIVE ROCK Rock mass with few discontinuities Excavation dimension < discontinuity spacing BLOCKY/JOINTED ROCK Rock mass with moderate number of discontinuities Excavation dimension > discontinuity spacing
HEAVILY JOINTED ROCK Rock mass with a large number of discontinuities Excavation dimension >> discontinuity spacing
10. Thank You.
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