9
and size could be changed. Further study is suggested and
as easy as 1-2-3 with the software used for mesh genera-
tion, analysis and plotting of mesh and element safety fac-
tor distribution.
In conclusion, a numerical analysis of the #5 venti-
lation shaft at Solvay Chemicals’ trona mine in southern
Wyoming using the popular finite element method indi-
cates a safe shaft during and after completion of 26 ft (7.9
m) diameter shaft from the 1500 ft (457 m) level to the
surface. A study by RESPEC prior to shaft excavation
also concluded that the shaft would be safe (Haugen and
Raffadi 2020).
ACKNOWLEDGMENT
Grateful Acknowledgment is made to Solvay Chemical
Company mine engineer Mr. Matteo Paperini for review
and permission to present this brief study to SME section
attendees. Solvay Chemical Company has been especially
helpful in educating our student mining engineers with vis-
its to the underground during the school year.
REFERENCES
[1] Pariseau, W. G. (2017) Comparison of Underground
Coal and Trona Mine Seismicity. Preprint 17-2017,
SME Annual Meeting, February 19–22, 2017,
Denver, CO.
[2] Agapito, J.F.T., J.W. Bennett,m and J.P. Hunter
(1978) Rock Mechanics for Two-seam Mining at the
Big Island Trona Mine, Stauffer Chemical Company
of Wyoming. Proc. 19th U.S. Symposium on Rock
Mechanics. University of Nevada – Reno, May 1–3,
1978.
[3] Pariseau, W.G. (1999) An Equivalent Plasticity
Theory for Jointed rock Masses. Int. J. Rock. Mech.
Mng. Sci. Vol. 36, No. 7, pp 907–918.
[4] Haugen, B. and M. Raffadi (2020) Geotechnical Risk
Assessment for the No. 5 Ventilation Shaft. Topical
Report RSI-3056. RESPEC, 3824 Jet Drive, Rapid
City, SD 57703
and size could be changed. Further study is suggested and
as easy as 1-2-3 with the software used for mesh genera-
tion, analysis and plotting of mesh and element safety fac-
tor distribution.
In conclusion, a numerical analysis of the #5 venti-
lation shaft at Solvay Chemicals’ trona mine in southern
Wyoming using the popular finite element method indi-
cates a safe shaft during and after completion of 26 ft (7.9
m) diameter shaft from the 1500 ft (457 m) level to the
surface. A study by RESPEC prior to shaft excavation
also concluded that the shaft would be safe (Haugen and
Raffadi 2020).
ACKNOWLEDGMENT
Grateful Acknowledgment is made to Solvay Chemical
Company mine engineer Mr. Matteo Paperini for review
and permission to present this brief study to SME section
attendees. Solvay Chemical Company has been especially
helpful in educating our student mining engineers with vis-
its to the underground during the school year.
REFERENCES
[1] Pariseau, W. G. (2017) Comparison of Underground
Coal and Trona Mine Seismicity. Preprint 17-2017,
SME Annual Meeting, February 19–22, 2017,
Denver, CO.
[2] Agapito, J.F.T., J.W. Bennett,m and J.P. Hunter
(1978) Rock Mechanics for Two-seam Mining at the
Big Island Trona Mine, Stauffer Chemical Company
of Wyoming. Proc. 19th U.S. Symposium on Rock
Mechanics. University of Nevada – Reno, May 1–3,
1978.
[3] Pariseau, W.G. (1999) An Equivalent Plasticity
Theory for Jointed rock Masses. Int. J. Rock. Mech.
Mng. Sci. Vol. 36, No. 7, pp 907–918.
[4] Haugen, B. and M. Raffadi (2020) Geotechnical Risk
Assessment for the No. 5 Ventilation Shaft. Topical
Report RSI-3056. RESPEC, 3824 Jet Drive, Rapid
City, SD 57703