Articles in Peer Refereed Journals [NOTE – Authors underlined are mentored students]
2013

Lisjak, A., Grasselli, G., Vietor, T., Numerical analysis of failure mechanisms around unsupported circular excavations in clay shales – International Journal of Rock Mechanics and Mining Sciences (in press) http://dx.doi.org/10.1016/j.ijrmms.2013.10.006

2013

Muralha J., Tatone, B.S.A., Grasselli G., Blümel M., Chryssanthakis P., Jiang Y., ISRM Suggested Method for Laboratory Determination of the Shear Strength of Rock Joints – Rock Mechanics Rock Engineering (in press)

2013

Lisjak A., Liu Q., Zhao Q., Mahabadi O. K., Grasselli G., 2013, Numerical simulation of acoustic emission in brittle rocks by two-dimensional finite-discrete element analysis – Geophysical Journal International, 195/1:423-443, http://dx.doi.org/10.1093/gji/ggt221

2013

Lisjak A., Tatone B.S.A., Grasselli G., Vietor T., Numerical modelling of the anisotropic mechanical behaviour of Opalinus Clay at the laboratory-scale using FEM/DEM – Rock Mechanics Rock Engineering, http://dx.doi.org/10.1007/s00603-012-0354-7

2012

Tatone B.S.A., Grasselli G., Quantitative measurements of fracture aperture and directional roughness from rock cores, Rock Mechanics Rock Engineering, 45/4, pp. 619-629,http://dx.doi.org/10.1007/s00603-011-0219-5

2012

Mahabadi O. K., Randall N. X., Zong Z., Grasselli G., A novel approach for micro-scale characterization and modeling of geomaterials incorporating actual material heterogeneity, Geophysical Research Letters, 39, L01303, 6 pp., http://dx.doi.org/10.1029/2011GL050411

2012

Mahabadi O. K., Lisjak A., Munjiza A., Grasselli G., Y-Geo: a new combined finite-discrete element numerical code for geomechanical applications – ASCE – International Journal of Geomechanics,http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0000216

2012

Barla M., Piovano G., Grasselli G., Rock slide simulation with the combined finite discrete element method, ASCE – International Journal of Geomechanics,http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0000204

2012

Tatone B.S.A., Grasselli G., An Investigation of Discontinuity Roughness Scale-Dependency Using High-Resolution Surface Measurements – Rock Mechanics Rock Engineering,http://dx.doi.org/10.1007/s00603-012-0294-2

2010

Tatone, B.S.A., Grasselli, G., A new 2D discontinuity roughness parameter and its correlation with JRC. International Journal of Rock Mechanics and Mining Sciences, doi: 10.1016/j.ijrmms.2010.06.006

 
2010

Mahabadi, O.K.Cottrell, B.E., Grasselli, G., 2010, An Example of Realistic Modelling of Rock Dynamics Problems: FEM/DEM Simulation of Dynamic Brazilian Test on Barre Granite .Rock Mechanics and Rock Engineering. DOI: http://dx.doi.org/10.1007/s00603-010-0092-7

 
2010

Satio, H., Grasselli, G.,Geostatistical downscaling of fracture surface topography accounting for local roughness, Acta Geotechnica, DOI: 10.1007/s11440-010-0114-3 pp.12.

 
2010

Nasseri, M.H.B., Grasselli, G., Mohanty, B.,2010, Fracture toughness and fracture roughness in anisotropic granitic rocks, Rock Mechanics Rock Engineering doi: 10.1007/s00603-009-0071-z

 
2010

Mahabadi, O.K., Grasselli, G., Munjiza, A.,2010, Y-GUI: A graphical user interface and pre-processor for the combined finite-discrete element code, Y2D, incorporating material heterogeneity. Computers & Geosciences, Volume 36, Issue 2, February 2010, Pages 241-252

 
2010

Tatone, B.S.A., Grasselli, G., 2010, ROCKTOPPLE: A Spreadsheet-Based Program for Probabilistic Block Toppling Analysis. Computers & Geosciences, Volume 36, Issue 1, January 2010, Pages 98-114.

2009

Tatone, B.S.A., Grasselli, G., A method to evaluate the 3D roughness of fracture surface in brittle geo-materials, Review of Scientific Instruments, 80, 125110; doi:10.1063/1.3266964

 
2009

Nasseri, M.H.B., Tatone, B.S.A., Grasselli, G., Young P.R., 2009, Fracture toughness and fracture roughness interrelationship in thermally treated Westerly granite, Pure and Applied Geophysics, 166, pp. 801-822. (Tatone and Nasseri equally contributed to this work)

 
2007

Kim, B.H., Grasselli, G., Kaiser P.K., 2007, Influence of persistence on behaviour of fractured rock masses, Journal of the Geological Society, SP284; p. 161-173, doi:10.1144/SP284.11 http://jgs.geoscienceworld.org

 
2006

Boutt, D.F., Grasselli, G., Fredrich, J.T., Cook, B.K., Williams, J.R.,2006, Experimental and numerical study of colloid transport in a single fracture, Geophysical Research Letters, 33, L21402, doi:10.1029/2006GL027275 (Grasselli and Boutt equally contributed to this work)

 
2006

Grasselli, G., 2006, Shear Strength of Rock Joints Based on Quantified Surface Description, in Rock Mechanics Rock Engineering, 39/4, pp. 295-314.

 
2005

Grasselli, G., 2005, 3D Behaviour of Bolted Rock Joints: Experimental and Numerical Study, International Journal of Rock Mechanics and Mining Sciences, 42/1, pp. 13-24.

 
2003

Grasselli, G., Egger, P., 2003, Constitutive Law for Shear Strength of Rock Joints Based on Quantitative 3-Dimensional Surface Parameters, International Journal of Rock Mechanics and Mining Sciences, 40/1, pp. 25-40.

 
2002

Grasselli, G., Wirth, J., Egger, P., 2002, Quantitative three-dimensional description of a rough surface and parameter evolution with shearing, International Journal of Rock Mechanics and Mining Sciences, 36/6, pp. 789-800

 
Software [NOTE – Authors underlined are mentored students]
2011

Y-GEO, Mahabadi O.K., Lisjak, A., Grasselli G., Munjiza A.

2009

ROCKTOPPLE, Tatone, B.S.A., Grasselli G.

2009

Y-GUI, Mahabadi O.K., Grasselli G.

2003

Rock3CAD, Wirth J., Grasselli G.

Articles in Peer Reviewed Conference proceedings [NOTE – Authors underlined are mentored students]
2013

Grasselli G, Zhao Q., Lisjak, A., Liu Q., Numerical simulation of acoustic emissions in rock using FEM/DEM, RocDyn – Lausanne, Switzerland – June 6-8, 2013 [Keynote lecture]

2012

Tatone BSA, Grasselli G., 2012, Modeling direct shear tests with FEM/DEM: Investigation of discontinuity shear strength scale effect as an emergent characteristic, American Rock Mechanics Conference – Chicago, US – June 24-27, 2012

2012

Lisjak, A., Tatone BSA, Grasselli G., Vietor T., Modeling of the strength and deformation anisotropy of an argillaceous rock (Opalinus Clay) at the laboratory-scale, American Rock Mechanics Conference – Chicago, US – June 24-27, 2012

2012

Lisjak, A., Tatone BSA, Mahabadi OK, Grasselli G., Block caving modelling using the Y-Geo hybrid finite-discrete element code, MassMin – Sudbury, Canada – May 11-13, 2012

2012

Lisjak, A., Tatone BSA, Grasselli G., Vietor T., Combined finite-discrete element modelling of the influence of bedding planes on the mechanical behaviour of Opalinus Clay, RockEng12 – Edmonton, Canada – May 5-7, 2012

2011

Lisjak, A., Mahabadi O.K., Tatone B.S.A., Grasselli G., Slope stability assessment using a hybrid finite-discrete element method code (FEMDEM), In Proc. 12th ISRM International Congress on Rock Mechanics – Beijing, China – October 18-21, 2011

2011

Manzella I., Einstein H.H., Grasselli G., Analytical and numerical modeling of granular and block flows to investigate large debris avalanche runout, Second World Landslide Forum – Rome, Italy – October 9-11, 2011

2011

Lisjak, A., Grasselli G., Influence of initial block packing on rock avalanche flow and emplacement mechanisms through FEMDEM simulations, PAN-AM CGS Geotechnical Conference – Toronto, Canada – October 2-6, 2011

2011

Manzella I., Lisjak, A., Mahabadi O.K., Grasselli G., Influence of initial block packing on rock avalanche flow and emplacement mechanisms through FEMDEM simulations, PAN-AM CGS Geotechnical Conference – Toronto, Canada – October 2-6, 2011

2011

Lisjak, A., Grasselli G., Numerical modeling of failure around a circular excavation using a hybrid finite-discrete element method code (FEM-DEM), XXIV Convegno Nazionale di Geotecnica – Napoli, Italy – June 22-24, 2011

2010

Tatone, B.S.A.Mahabadi, O.K.Lisjak, A., Grasselli G., 2010. Evaluation of the combined finite element-descrete element method for the assessment of gravity dam stability, CDA 2010 -Niagara Falls – 3-7 October 2010

 
2010

Tatone, B.S.A., Grasselli, G., Cottrell, B., 2010. Accounting for the influence of measurement resolution on discontinuity roughness estimates, Eurock 2010, Lausanne, Switzerland -14-18 June 2010

 
2010

Cottrell, B.Tatone, B.S.A., Grasselli, G., 2010. Joint replica shear testing and roughness degradation measurement, Eurock 2010, Lausanne, Switzerland -14-18 June 2010

 
2010

Mahabadi, O.K.Lisjak, A., Grasselli, G., Lukas, T., Munjiza, A., 2010. Numerical modelling of a triaxial test of homogeneous rocks using the combined finitediscrete element method, Eurock 2010, Lausanne, Switzerland -14-18 June 2010.

 
2009

Tatone, B.S.A., Donnely, C.R., Protulipac, D.G., Clarke, C., Evaluation of the hydraulic efficiency of newly constructed plastic concrete cut-off wall. In Proceedings of the 2009 Canadian Dam Association Conference, Whistler, BC. 3-8 October 2009

 
2009

Tatone, B., Grasselli, G., Use of a stereo-topometric measurement system for the characterization of rock joint roughness in-situ and in the laboratory, in Proc. RockEng09, 9-15 May 2009, Toronto, Canada

 
2009

Mahabadi, O.K., grasselli, G., Munjiza, A., 2009, Numerical modelling of a brazilian Disc test of layered rocks using the combined finite-discrete element method, in Proc. RockEng09, 9-15 May 2009, Toronto, Canada

 
2009

Stefanizzi, S., Barla, G., Kaiser, P.K., Grasselli, G., 2009, Numerical modeling of rock mechanics tests in layered media using a finite/discrete element approach. in Proc. RockEng09, 9-15 May 2009, Toronto, Canada.

 
2009

Assane, T.Cottrell, B., Grasselli, G., 2009, Contribution of surface roughness on the shear strength of Indiana limestone cracks – An experiemental study. in Proc. Rock joints and jointed rock masses, 6 – 12 January 2009, Tucson, AZ, USA.

 
2008

Stefanizzi, S., Barla, G., Kaiser, P.K., Grasselli, G., 2008, Numerical modeling of rock mechanics tests in layered media using a finite/discrete element approach, Proc. 12th IACMAG, pp 1126-1131.

 
2007

Nasseri, M.H.B., Grasselli, G., Mohanty, B., Wirth, J., Braun, M., 2007, Experimental relationship between fracture toughness and fracuture roughness in anisotropic granite rocks, Proc. 1st Canada US Rock Mech. Symp., pp.617-624.

 
2007

Saito, H., Grasselli, G., Ferrero, A.M., 2007, Accounting for local roughness in geostatistical simulation of fracture surface topography, Proc. 1st Canada US Rock Mech. Symp.

 
2005

Grasselli, G., Boutt, D.F., Fredrich, J.T., Cook, B.K., Williams, J.R., 2005, Experimental and numerical study of colloid transport in a single fracture, in Proc. IACMAG 2005, Turin, Italy.

 
2004

Grasselli, G., 2004, Rocha Medal Lecture: Shear Strength of Rock Joints Based on Quantified Surface Description, in Proc. 3rd arms 2004 Conference, Kyoto, Japan, pp. 87-99

 
2004

Grasselli, G., Fredrich, J.T., 2004, Direct measurement of flow in fractures, in Proc. Eurock 2004 Conference, Salzburg, Austria.

 
2003

Grasselli, G., Wirth, J., Zimmerman, R.W., 2003, Surface Parameters for Quantifying the Hydro-Mechanical Anisotropy of Rock Discontinuities, in Proc. ISRM 10th International Conference on Rock Mechanics, 8-12 september 2003, gauteng-Johannesburg, South Africa.

 
2002

Grasselli, G., Wirth, J., Zimmerman, R.W., 2002, Functional Parameters for Quantifying the Surface Anisotropy of Rock Discontinuities, in Proc. Eurock 2002 Conference, Funchal, Madeira Island, portugal, pp. 715-721

 
2001

Grasselli, G., Egger, P., Wirth, J., Hopkins, D., 2001, Characterization of the Parameters that Govern the Peak Shear strength of Rock Joint, in Proc. of DCRocks, washington DC, USA, pp. 817-821.

 
2000

Grasselli, G., Egger, P., 2000, 3D surface characterization for the prediction of the shear strength of rough joint, in Proc. Eurock 2000, ed. Wittke, Aachen, Germany, pp. 281-286.

 
1999

Grasselli, G., Kharchafi, M., Egger, P., 1999, Experimental and numerical comparison between fully grouted and frictional bolts, in Proc. 9th Int. Cong. on Rock Mechanics, ed. Vouille & Berest, Paris, France, pp. 903-907

 
1998

Kharchafi, M., Grasselli, G., Egger, P., 1998 3D behaviour of bolted rock joints: experimental and numerical study, in mechanics of jointed and faulted rock, ed. Rossmanith, Vienna, Austria, pp. 299-304

 
Conference Abstracts [NOTE – Authors underlined are mentored students]
2013

Grasselli G., Lisjak, A., Garitte, B., Müller, H. R., Vietor, T., Bringing FDEM to practice – Study of the mechanism that contribute to the development of a damaged area around excavations in a layered rock formation. In DEM6 – Boulder, Colorado, August 5-6, 2013 [Keynote for the special session on FDEM]

2012

Grasselli G., Lisjak, A., Tatone B.S.A., Mahabadi O.K., Numerical study of the influence of pre-existing features on the hydraulic fracturing process using FEM/DEM. In ALERT Workshop – “Geomechanics for energy production” – October 3, 2012

2012

Lisjak, A., Tatone B.S.A., Grasselli G., Numerical modelling of the anisotropic mechanical behaviour of Opalinus Clay using FEM/DEM. In ALERT Workshop October 2, 2012

2012

Lisjak, A., Tatone B.S.A., Grasselli G., Vietor T., Micro-mechanical modeling of the strength and deformation anisotropy of Opalinus Clay. In Proc. TIMODAZ Workshop – Mont Terri Rock Laboratory, Saint-Ursanne, Switzerland – February 6-7, 2012

2011

Coppini, H., Sublett C., Tatone B.S.A., Grasselli G., Experimental study on shear strength of non-persistent joins – RockEng2012 (28/10/2011) [abstract accepted, but not complemented by full paper]

2011

Manzella I., Einstein H.H., Grasselli G., 2011. Propagation of large debris avalanches: analytical, DEM and FEMDEM modelling of granular and block flows. Geophysical Research Abstracts Vol. 13, EGU2011-1533, 2011

2007

Grasselli, G., Saito, H., 2007, Geostatistical downscaling of fracture surface topography and its impact on fluid flow through fracture, in Proc. ALERT meeting, Aussois, France.

 
2007

Magni F., Grasselli G., 2007, Post-peak fracture behavior during direct shear tests of rock joints, in Proc. Euroconference on Rock Physics and Geomechanics, 25 – 30 September 2007, Erice, Italy

 
2007

Nasseri M.H.B., Grasselli G., Mohanty B., Cho S.H., 2007, Three-dimensional observation of the fracture process zone in anisotropic granitic rock by x-ray CT scan and 3D stereo topometric cameras, in Proc. Euroconference on Rock Physics and Geomechanics, 25 – 30 September 2007, Erice, Italy

 
2005

Grasselli G., Boutt D., Fredrich, J. T., 2005, Colloid traps: Microscale modeling of solid transport through a single rock fracture, in Proc. AGU Fall Meeting, 5-9 December 2005, San Francisco, USA.

 
2005

Kim B.H., Grasselli G., 2005, Influence of Rock Bridges on Shear Behaviour of Fractured Rock Masses, in Proc. EURO-Conference on Rock Physics and Geomechanics, Micromechanics, 18 – 22 September 2005, Ile d’Oléron, France

 
2003

Grasselli G., Saito H., 2003, Multi-scale Characterization of Rock Fracture Surfaces Using Roughness Analysis and Geostatistics, in Proc. Fall AGU meeting, San Francisco, USA.

 
2003

Grasselli G., Zimmerman R.W., 2003, Influence of Roughness on the Hydro-Mechanical Behaviour of Rock Discontinuities, in Proc. Euroconference on Rock Physics and Geomechanics, Micromechanics, Flow and Chemical Reactions, 7-11 September 2003, Kijkduin, The Netherlands

 
2002

Grasselli G., 2002, A New Peak Shear Strength Criterion for Rock Joints, in Proc. W(H)YDOC 02, 4-6 December 2002, Paris, France.

 
2002

Grasselli G., 2002, Geometrical Characterization of Damaged Areas on Sheared Rock Fractures, in Proc. IARG2002, 19-21 June 2002, Napoli, Italy (in Italian)

 
2000

Grasselli, G., Egger P., 2000, Three-dimensional optical measurement and characterization of rough surfaces, in GSA meeting, Reno, USA.

 
Books, book chapters reports, professional journals and thesis [NOTE – Authors underlined are mentored students]
2009

Grasselli, G., Munjiza, A., Cottrell, B.Mahabadi, O.K., 2009.FEM/DEM Simulation of Dynamic Brazilian Tests, ISRM News Journal, vol 12, pp 80-83 (Technical article in professional society journal)

 
2009

Diederichs, M., Grasselli G., 2009 Rock engineering in difficult conditions, 256 pages + CD, ISBN 978-0-7727-7588-7 (Edited Book)

 
2007

Grasselli, G., Kim, B., 2007, Use of 3D digital system for rock mass characterization. Memorie in ricordo di Renato Ribacchi. Patron Ed. pp. 87-97 (Book Chapter in Italian)

 
2005

Kaiser, P.K., Grasselli, G., 2005, Review of stress-driven dynamic failure during tunnel excavation, (Industry technical report)

 
2001

Grasselli G., 2001. Shear Strength of Rock Joints Based on Quantified Surface Description. Ecole Polytechnique Fédérale de Lausanne, Switzerland, advisors Prof. F. Descoeudres & Prof. P.Egger, (PhD thesis)

 
1995

Grasselli G., 1995. Comportamento meccanico di masse rocciose discontinue rinforzate con bulloni passive. advisors Prof. Giani G. P. & Prof. Egger P., Università degli Studi di Parma. (in Italian) (Tesi di Laurea)