Rock Mechanics Flashcards
1
Q
Mechanical properties of rock depend on….
A
composition
fabric
jointing/faulting
folding
2
Q
Rock strength applies to…
A
intact rock
3
Q
Rock mass strength considers…
A
fractures + other properties
4
Q
Rock failure occurs when…
A
Peak stress is reached
UCS only involves Sigma 1
5
Q
Shear strength =
A
Cohesion + (Normal stress * tan(phi)
6
Q
Pore water pressure reduces..
A
normal stress and therefore shear strength
7
Q
Strength tests -
A
UCS
Triaxial test
Point load test
Schmidt hammer
8
Q
Rock mass strength considers
A
fracture densities
fracture orientation
fracture types
rock mass classification
9
Q
Fractures types
A
micro fractures
joints
faults
10
Q
Fracture …………… affects strength
A
orientation
