Early engineering works (1900s) assumed that rock was infinitely strong (T/F) - answer-True
What is the name of the phenomenon, typical of very deep mining, that describes rock effectively "imploding" in the excavation? - answer-Rockburst
Photo-elasticity was used in the early days of rock en...
Early engineering works (1900s) assumed that rock was infinitely strong (T/F) -
answer-True
What is the name of the phenomenon, typical of very deep mining, that describes
rock effectively "imploding" in the excavation? - answer-Rockburst
Photo-elasticity was used in the early days of rock engineering to look at how
stresses were redistributed around an excavation. In terms of mechanical behaviour
of rock masses, what was the underlying assumption of that technique. - answer-
Rock masses were considered as elastic media
The behaviour of most engineering structures in rock are exclusively controlled by
the strength of the intact rock (T/F) - answer-False
What are two examples of disasters that happened in the period of 1950 - 1960 that
had a major impact on the development of rock mechanics. - answer-Malpasset dam
collapse; Vajont rockslide
Name three (3) rock mass classification systems widely used in today's rock
engineering? - answer-Q Index (Barton et al., 1974)
Geological Strength Index (GSI)
Rock Mass Rating (RMR) system
If the unit weight of rock is 26 kN/m3 then the vertical stress acting on an element of
rock at a depth (z) of 200m would be: - answer-5.2MPa
Human Uncertainty - answer-Subjectivity and measurement error, differing
professional opinions
Model Uncertainty - answer-Gaps in the scientific theory that is required to make
predictions on the basis of causal inference
Geological Uncertainty - answer-Unpredictability associated with the identification,
characterisation and interpretation of the site geology and hydrogeology
CONT +
, MINE 303 - Final Exam with correct
answers 2024
Parameter Uncertainty - answer-Absence of data for key parameters, spatial
variability in rock/ soil properties, and scale effects (e.g. intact rock vs. rock mass
properties)
Rock engineering design generally requires the real problem to be idealised and
simplified (T/F) - answer-True
In order to reduce engineering risk, it is necessary to: - answer-Reduce data
uncertainty and address the observed variability in a qualitative and quantitative
manner.
Consider both data uncertainty and data variability
In rock engineering, design often has to be completed prior to developing access to
rock exposures therefore: - answer-Geotechnical assumptions made at the
beginning of a project need to be revised as the project is being developed
Scanline mapping is an efficient method to collect discontinuity data since all the
discontinuities within the selected rock outcrop are included in the mapping process
(T/F) - answer-False
JRC assessments (10cm scale) less than 10 are indicative of rough surfaces (T/F) -
answer-False
When collecting rock engineering data from rock exposures, every structural feature
must be included in the survey (T/F) - answer-False
When collecting rock engineering data from rock exposures, the proportion of the
rock mass to be surveyed should be relative to the characteristics of the structural
features being mapped (T/F) - answer-True
When collecting rock engineering data from rock exposures, the proportion of the
rock mass to be surveyed would be the same for all rock types (T/F) - answer-False
CONT +
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