Engineering Geology: Rock Slope Analysis Using Stereonets: Kinematic Analysis Flashcards
What are the three main types of rock failure evaluated in kinematic analysis?
Topple failure
Planar/slide failure
Wedge failure
What does the relationship between rock face and planes help determine in kinematic analysis?
The direction of sliding.
Which of the following are limitations of kinematic analysis?
A. Requires field data
B. Assumes no cohesion
C. Considers water pressure
D. Predicts time of failure
A and B
What does kinematic analysis assume about cohesion?
Cohesion is zero; only friction angle is used to define shear strength.
T/F: Kinematic analysis provides a definitive answer on whether failure will occur.
False – it only determines possibility, not certainty.
What important aspects are not considered in kinematic analysis?
Water forces
Reinforcement (e.g. bolts)
Timing (temporal effects)
Name three fracture logging or sampling methods used in slope analysis.
Trial pits and trenches
Borehole and core logging
Scanline of exposure
___ testing and ___ sampling are part of site investigation for kinematic analysis.
In-situ; lab
What does a plane plot represent in slope stability analysis?
The orientation and dip of joints/fractures relative to the rock face.
Why are multiple plane plots often used in chalk slope studies?
To capture variability in fracture orientation and density.
What is a rose diagram used for in geological slope analysis?
To show frequency distribution of fracture orientations (strike directions).
What is a daylight envelope in kinematic analysis?
A zone plotted on the stereonet showing orientations that daylight on the slope face and may slide.
The daylight envelope is based on the ___ and ___ of the slope face.
Orientation; dip
Planes falling outside the friction cone are considered potentially ___ in kinematic analysis.
Unstable
What three questions must be asked when assessing failure in kinematic analysis?
Is toppling failure possible?
Is planar failure possible?
Is wedge failure possible?
T/F: Kinematic analysis is more relevant to tunnelling than other civil works.
True – because of complex interactions with joint orientations
