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MINE ENGINEERING ROCK
MECHANICS
(�a personal view�)
W.G. Pariseau
Professor of Mining Engineering
Department of Mining Engineering
University of Utah, Salt Lake City, UT
ARMA WORKSHOP
June 26, 2010
Park City, Utah
PAST ACHIEVEMENTS
(that I have seen since 1960’s)
Where we are and how we got here
Morning Panel Presentation
ARMA WORKSHOP
June 26, 2010
Park City, Utah
PAST PRACTICAL ACHIEVEMENTS:
(laboratory testing, mine measurements,
analysis, comparisons, demonstration�)
1. MINE FILL
2. IN SITU STRESS MEASUREMENT
3. STRESS ANALYSIS FOR DESIGN
4. ROCK SLOPE STABILITY
5. CABLE BOLTING AND VCR MINING
6. DRIFT AND FILLCRETE MINING
7. NUMERICAL METHODS FOR DESIGN
Mine Fill Research: lab testing
+mine measurements+ FE modeling
SRC, USBM,Coeur d’Alene Mining District
Stress Measurement In Situ
Overcoring at the Kelly Block Cave Mine, Anaconda Co., Butte, MT
HI Cells
USBM BDG’s
4-prong, 1-prong
Doorstoppers
(4-gauge)
Stress Analysis for Design (the early years, for example)
• La Mecanique des Roches, J. Talobre, 1957
• Rock Mechanics and the Design of
Structures in Rock, L. Obert and W. I. Duvall (1967).
• Elasticity, Fracture and Flow, J. C. Jaeger, 1969
• Rock Mechanics Principles, D.F. Coates (1970).
Mainly, stress concentration about
holes of simple shape, using
results from elasticity theory, e.g.,
the problem of a circular hole in
plane strain or plane stress (Kirsch
equations), other shapes using
complex variable theory – applied
mathematics, pre-computer era.
Rock Slope Stability – Economics!
Rock Slope Engineering, E. Hoek and J. Bray, 1974
(wedge failures, joints, toppling, slip circles, drainage, blasting)
Rock Slope Stability – Economics!
Guidelines for Open Pit Slope Design, J. Read and P. Stacey (eds) 2009. (wedge failures, joints,
toppling, slip circles, drainage, blasting, risk analysis)
Rock Slope Stability�2009
Blasting
Drainage
CABLE BOLTING & VCR MINING
INSTRUMENTATION and MINE
MEASUREMENTS of
DISPLACEMENTS
R=0.84
DRIFT& FILLCRETE MINING
75 ft span
instrumentation first and second pillar blasts
back fillcrete is holding nicely
Turquoise Ridge, Nevada, 2002
Numerical Methods for Design, i.e., FEM
• Berkeley Pit, 1969
Numerical Methods for Design, i.e., FEM
Galena Mine, 1972
Numerical Methods� • Continuum codes: FEM, BEM, FDM,
• Rock Block codes: DEM, NMM, DDA (physical laws, kinematics, material laws)
- equilibrium (static, dynamic) equations - strain displacement equations
- stress strain equations
NOTE: Continuum codes accommodate
discontinuities and Rock Block codes
accommodate deformable blocks.
FUTURE NEEDS
(afternoon panel presentation)
Where do go from here?
ARMA WORKSHOP
June 26, 2010
Park City, Utah
Thank you!
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