9
of the ramp runstream file using the popular finite ele-
ment method for computation of displacement and strain
induced by excavation and resulting stress. Yielding occurs
in elements that reach the elastic limit, so the extent of elas-
tic and yielding zones are evident in an output file con-
taining element safety factors. Plotting of element safety
factors is easily done and provides design guidance. Should
the results show extensive yielding, a new design is read-
ily done by repeating the three step process with appro-
priate changes in ramp geometry and perhaps location. A
user manual provides similar process details to several other
important mine design problems (Pariseau 2022).
REFERENCES
Board, M. P. and M. J. Beus In situ Measurements and
Preliminary Desgin Analysis for Deep Mine Shafts in
Highly Stressed Rock. U.S.B.M. RI 9231.
Duan, F. (1985) Report on Rock Properties for the
Homestake Mine. Internal Report, Department of
Mining Engineering, University of Utah.
Golder Associates (2010) Preliminary Design Interim
Report #3. Contract D10-04 Engineering and Design
Services for Excavation—DUSEL.
Pariseau, W. G. (1985) “Research Study on Pillar Design
for Vertical Crater Retreat (VCR)” U. S. Bureau of
Mines Final Report, Contract J0215043 University of
Utah.
Pariseau, W. G. (1999) “An Equivalent Plasticity Theory
for Jointed Rock Masses.” Int’l J. Rock Mech. Mng. Sci.,
Vol. 36, No.7, pp. 907–918.
Pariseau, W. G. (2022) “User Manual for a Three-
dimensional Finite Element Program UT3PC (2nd
edition) A Fundamental Approach to Design of Coal
Mine Entries, Barrier Pillars, Bleeder Entries, Interpanel
Barrier Pillars, Pillars and Rooms in Room and Pillar
Mines, Shafts and Tunnels.” Website UT3PC.net.
Williams, T. J., J. K. Whyatt and M. E. Poad (1992) Rock
Mechanics Investigations a the Lucky Friday Mine (In
Three Parts) 1. Instrumentation of an Experimental
Underhand Longwall Stope. U.S.B.M. RI 9432.
Figure 10. Element safety factor distributions in cross-sections of a 360 deg spiral ramp at the minimum ramp radius
of the ramp runstream file using the popular finite ele-
ment method for computation of displacement and strain
induced by excavation and resulting stress. Yielding occurs
in elements that reach the elastic limit, so the extent of elas-
tic and yielding zones are evident in an output file con-
taining element safety factors. Plotting of element safety
factors is easily done and provides design guidance. Should
the results show extensive yielding, a new design is read-
ily done by repeating the three step process with appro-
priate changes in ramp geometry and perhaps location. A
user manual provides similar process details to several other
important mine design problems (Pariseau 2022).
REFERENCES
Board, M. P. and M. J. Beus In situ Measurements and
Preliminary Desgin Analysis for Deep Mine Shafts in
Highly Stressed Rock. U.S.B.M. RI 9231.
Duan, F. (1985) Report on Rock Properties for the
Homestake Mine. Internal Report, Department of
Mining Engineering, University of Utah.
Golder Associates (2010) Preliminary Design Interim
Report #3. Contract D10-04 Engineering and Design
Services for Excavation—DUSEL.
Pariseau, W. G. (1985) “Research Study on Pillar Design
for Vertical Crater Retreat (VCR)” U. S. Bureau of
Mines Final Report, Contract J0215043 University of
Utah.
Pariseau, W. G. (1999) “An Equivalent Plasticity Theory
for Jointed Rock Masses.” Int’l J. Rock Mech. Mng. Sci.,
Vol. 36, No.7, pp. 907–918.
Pariseau, W. G. (2022) “User Manual for a Three-
dimensional Finite Element Program UT3PC (2nd
edition) A Fundamental Approach to Design of Coal
Mine Entries, Barrier Pillars, Bleeder Entries, Interpanel
Barrier Pillars, Pillars and Rooms in Room and Pillar
Mines, Shafts and Tunnels.” Website UT3PC.net.
Williams, T. J., J. K. Whyatt and M. E. Poad (1992) Rock
Mechanics Investigations a the Lucky Friday Mine (In
Three Parts) 1. Instrumentation of an Experimental
Underhand Longwall Stope. U.S.B.M. RI 9432.
Figure 10. Element safety factor distributions in cross-sections of a 360 deg spiral ramp at the minimum ramp radius