Selected Publications

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2017. Application of Composite Geological Strength Index for healed rockmass structure to deep mine access tunnels.  World Tunnel Congress 2017 - Bergen, Norway, 10 pages.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2017. The influence of mineralogy and grain scale features in healed intrablock structure on direct shear properties in the Cobourg limestone.  51st US Rock Mechanics, Geomechanics Symposium, San Francisco, 25-28 June, CA, USA.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2017. An overview of the influence of healed intrablock structure on rockmass behaviour.  Canadian Institute of Mining 2017 Convention, April 30-May 3, Montreal, QC, Canada.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2017. Investigating normal and shear stiffness properties of fractures and healed sedimentary nodular structure in the Cobourg limestone.  Canadian Geotechnical Society Conference, GeoOttawa 2017, Ottawa, ON, Canada.

Day, J.J, Diederichs, M.S., and Hutchinson, D.J. 2016. New direct shear testing protocols and analyses for fractures and healed structures.  Submitted to Engineering Geology Special Issue on "Characterization of Fractures in Rock: from Theory to Practice" (ROCKFRAC) Eds. X. Zhuang, D. Tannant, and G. Ma.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2016. Validation of Composite Geological Strength Index for healed rockmass structure in deep mine access and production tunnels.  Tunnelling Association of Canada Conference, October 16-18, Ottawa, ON, Canada, 8 pages.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2015.  Effects of structural contact stiffness and strength on progressive failure of healed structure.  In: Proceedings of the ISRM Regional Symposium EUROCK 2015 & 64th Geomechanics Colloquium - Future Development of Rock Mechanics, Schubert, W. & Kluckner, A. (eds), Salzburg, Austria, 7-10 October 2015, pp. 433-438.  Austrian Society for Geomechanics: Salzburg.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2015. Optimization of structural contact stiffness and strength for discrete simulation of progressive failure of healed structure.  Geomechanics and Tunnelling. v8(2015):5:p414-420. DOI: 10.1002/geot.201500027

Day, J.J., Diederichs, M.S. and Hutchinson, D.J. 2015. Common Core: Core logging procedures for characterization of complex rockmasses as input into geomechanical analysis for tunnel design.  Tunnels and Tunnelling. v2015:1:p26-32.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2015. The influence of intrablock structure on the behaviour of excavations in complex rockmasses.  Advances in Earth Science Research Conference, AESRC, Kingston, ON, March 27-29, 1 page abstract [oral presentation].

Van der Pouw Kraan, M.C., Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2014. Impact of joint properties on rockmass behaviour predictions for underground excavations.  International Discrete Fracture Network Engineering Conference, October 19-22, Vancouver, BC, Canada, 10 pages.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2014. Component and system deformation properties of complex rockmasses with healed structure. 48th U.S. Rock Mechanics Geomechanics Symposium, ARMA, Minneapolis, MN, USA, 11 pages.

Day, J.J. Huchinson, D.J., and Diederichs, M.S. 2014.  Challenges in characterization of complex rockmasses, using drill core, as input into geomechanical analysis for tunnel design.  World Tunnel Congress 2014 - Foz do Iguaçu, Brazil, 10 pages.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2013. The influence of intrablock structure on rockmass strength. 4th Canadian Young Geotechnical Engineers and Geoscientists Conference, cYGEGC, Mont-Tremblant, QC, October 3-6, 2 pages [oral presentation].

Day, J.J., Duran, F.I., Diederichs, M.S., and Hutchinson, D.J. 2013. Accounting for rockmass structure in open pit and underground mine design.  47th U.S. Rock Mechanics Geomechanics Symposium, ARMA, San Francisco, CA, USA, 10 pages.

Day, J.J., Diederichs, M.S., and Hutchinson, D.J. 2013. Incorporation of geostructural data into discrete analysis for tunnel design.  ITA-AITES World Tunnel Congress, May 31 - June 7, 2013, Geneva, Switzerland, 8 pages.

Day, J.J., Walton, G., Diederichs, M.S., and Hutchinson, D.J. 2012. The influence of structure on rockmass strength at depth.  Tunnelling Association of Canada Conference, Montreal, QC, 8 pages.

Day, J.J. Huchinson, D.J., and Diederichs, M.S. 2012.  A critical look at geotechnical classification for rock strength estimation. 46th U.S. Mechanics Geomechanics Symposium, ARMA, Chicago, IL, USA, 10 pages.