







Selected downloads:
Click here to donwload the PDF with all front pages 19712020 (25mb).
Click here to donwload the PDF with all front pages from 2021 (500kb).
The links below are organized in chronological order and in standard reference style. Click on titles to download the .zip file.

2014.
Barton, N. Lessons learned using empirical methods applied in mining. Keynote, Lima, Peru. 24p. 
2014. Barton, N. Optimum advance for long distance TBM drives. Tunnel Talk. 
2014. Barton, N. Nonlinear shear strength of rock, rock joints, rockfill and interfaces. Marsal Lecture, SMIG, Mexico. 28p 
2014. Barton, N. and E. Quadros, Gasshale fracturing and fracture mobilization in shear  quo vadis. Goiana, Brazil, SBMR, 12p 
2014. Barton, N. and Grimstad, E. Qsystem application in NMT and NATM, cons. of overbreak. 7th Sfr symposium, Sandefjord, 17p 
2014. Barton, N. and E. Grimstad, Qsystem  An illustrated guide after 40 years in Tunnelling. 
2014. Barton, N. and Grimstad, E., Forty years with the Qsystem in Norway and abroad. Fjellsprengningsteknikk, NFF, Oslo, 25p 
2014. Barton, N. Nonlinear behaviour for fractured carbonates and fracstimulated shales. First Break, v. 32, 5166, Sept. EAGE 
2014. Barton, N. The shear strength of rock, rock joints and rock masses etc. Vigo, Keynote, 14p 
2014. Barton, N. & Grimstad, E. Qsystem, illustrated guide. Translation to Vietnamese Toản 
2014. Barton, N. Nonlinear rock mechanics. Keynote lecture, EAGE Geomechanics workshop, Dubai 
2015. Barton, N. and E. Quadros. Anisotropy is everywhere, to see, to measure and to model. Rock Mech Rock Eng. 
2015. Barton, N. Forty Years with the Qsystem – Lessons and Developments. IoM3, Hong Kong keynote 
2015. Barton, N. and N. Bar. Qslope method and its intended use within civil and mining engineering. Eurock2015, Salzburg 
2015. Barton, N. TBM performance, prognosis and risk caused by faulting. Invited plenary, Buenos Aires 
2015. Barton, N. Where is the nonlinear rock mechanics in the linear geomechanics of gas shales? China Shale Gas, Wuhan 
2016. Bar, Barton, Ryan, Q slope in saprolites. Eurock 2016, Cappadocia, Turkey 
2016. Barton and Bilgin, TBM fast and slow. Cappadocia, Eurock 
2016. Barton, N. Cavern and Tunnel Collapsesetc. CARTAGENA keynote, 2016 
2016. Barton, N. Nonlinear shear strength descriptions etc ARMA, Houston 
2016.Barton, N. Interview with Dr. Nick Barton. J. of Min. Eng. Dep. Karadeniz Tech. Univ, Trabzon, Turkey 
2017. Barton, N. and B. Shen, 2017. Risk of shear failure, extensional failure etc. JRMGE 9, Springer. 
2017. Barton, N. Tunnelling through intact, jointed, or faulted rock. Opening Session, WTC, Bergen. 
2017. Barton and Shen. Ny vitenskap om bruddmekanismer via bergmekanikk 
2017. Barton, N. and B. Shen. Extension failure, tunnels, cliffs, mountain walls. ARMA, San Francisco. 
2017. Barton, N. and S. Bandis. Characterization, modelling, shear strength  Vol. 1, Feng, ISRM. 
2017. Barton, N. Lessons learned from large failures. Keynote lecture, extended abstr. ISRM, Capetown 
2017. Barton. BartonBandis criterion summarized with figures 
2017. Prassetyo, Gutierrez, Barton. Nonlinear shear behaviour, linearized BB model. RMGE 
2018. Barton, RMR and RQD  an appreciation Bieniawski, Deere. QuestionAnswer to RG, 22.1.2018 
2018. Bar, N. and Barton, N. Rock Slope Design using Qslope and Geophysical Survey Data 
2018. Barton, N. TBM tunnelling under difficult conditions  too massive, too faulted, too wet, too deep. TUNISIA ISRM keynote 
2018. Barton, N. and B. Shen. Extension strain and rock strength limits. RMRE, Springer 
2018. Shen, B. and Barton, N. Rock fracturing mechanisms  underground openings. Geomech & Engineering, TechnoPress 
2018. Barton, Shen, Bar. Limited heights of cliffs, mountain walls  Qslope if jointed. Cobramseg, Salvador 
2018 Bar, N. and Barton. Qslope empirical approach in Australia. Australian Geomechanics 
2018. Shen, Shi, Barton. An approximate nonlinear modified MohrCoulomb strength criterion. J. Rock Mech & Geotech. Eng 
2018. Barton, N. Thermal overclosure. Coufrac conference, Invited lecture, Wuhan 
2018. BartonBandis criterion.Encycopedia of Eng. Geol. Bobrowsky, Marker (Eds). Springer 
2019. Bar and Barton. Qslope with faulting. ISRM Cong. Foz do Iguacu 
2019. Barton, N. and E. Quadros, Understanding need for preinjection, permeability connection. JRMGE 
2019. Barton, N. and Warren, C. UK Channel Tunnel using Q. Ch. 18 of Weak Rocks, Kanji 
2019. Barton, N. Research Gate series of questions on rock failure, GSI. 25.6.2019 NB&A 
2019. Barton, N. Underground nuclear power plants  rock engineering precedent. 19p. NB&A report 
2019. Barton, N. Tunnels, cliffs, mountains, shear strength. Keynote, 17p. ISRM Symp. OmisSplit, Croatia 
2019. Shen, Shi, Barton. Graphic examples  nonlinear strength criterion for intact rock. RMRE, Springer 
2019. Singh, M. and Barton. N. Highest mountains suggest curvature. ISRM Cong. Foz do Iguacu 
2020. Bar and Barton  Qslope for Arctic ice. Eurock, Trondheim 
2020. Barton, N. A review of overclosure, thermal overclosure. TUST May, 202021s2.0S0886779819309113main 
2020. Barton, N. and E. Quadros, 2020. Some lessons from singleshell Qsupported headrace tunnels. Eurock, Trondheim 
2020. Barton, N. Feedback to TunnelTalk. Hydropower tunnel failures, Brox 
2020. Barton, N. Feedback to TunnelTalk. Leakage mitigation in tunnelling, with emphasis on karst 
2020. Barton, N. Single shell lining design and advantages. TunnelTalk, Feb. 2020, Ed. S. Wallace. 
2020. Barton, N.Rock mechanics and nuclear waste disposal. Tunnel Talk, July 2020, 5p 
2020. Barton, N.Some rock mechanics tasks in nuclear waste disposal. NBA 
2020. Barton, N.Unconventional exploration of failure modes in rock and rock masses. Eurock, Trondheim 
2021.Barton, N. and E. QuadrosTechnical details of NMT. 5th CBT, Sao Paulo, Dec. 14p. 
2021.Barton, N. Conclusions on UNPP. ISRM commission, Sakurai. 
2021.Barton, N. Continuum or discontinuum GSI or JRC. ICGCMTU, Malaysia. Virtual. 39p. 
2021.Barton, N. Details related to the ten JRCprofiles. Research Gate, 29p. 
2021.Barton, N. Engineering and rock mechanics for underground (UNPPISRM) rock caverns. Ch. 16. 27p. 
2021.Barton, N. New ideas about failure modes. Bergmekanikkdag, Oslo. 33.133.20. 
2022. Addendum Tunnels and Tunnelling, May, 2022 
2022. Barton, N. and M. Abrieu. Tunnels and stations that should be deeper. TTI, April 2022 
2022. Barton, N. Barton responds to T&T Moscow metro article. 27.1.2022 
2022. Barton, N. Continuum or discontinuum LARMS 2022, Asuncion. corrected 
2022. Barton, N. Tunnels, caverns and slopes in discontinua. Kolkata keynote 
2022. Macias and Barton. NTNU and Qtbm, mixed face emphasis. Bergmekanikkdag 
2023. Barton, N. Numerical modelling trends. Civ. Eng 

SELECTED LECTURES (click to see)
2004. N. Barton. Risk and risk reduction in TBM tunnelling in rock. Keynote. ARMS, Kyoto, Japan. 
2005. N. Barton. Seismic Q, rock quality Q, rock joint compliance, anisotropy. EAGE, Madrid, Spain. 
2006. N. Barton. Fractureinduced seismic anisotropy, shearing, fractured reservoirs.12th IWSA, Beijing. 
2007. N. Barton. Thermal overclosure of joints and rock masses. ISRM Cong. Lisboa, Portugal. 
N. Barton, 2007. Two sets, four apertures, four compliances, shearing, fractured reservoirs. Perugia. 
2009. N. Barton. Differential weathering, adverse discontinuities, metro accident. Keynote. Rock Joints, Tucson. 
2009. N. Barton. Geophysics interpretation contrary to basic principles. Winter Conf., Bergen. 
2010. N. Barton. Low Stress and High Stress phenomena in Basalt May. Keynote, Volcanic Rocks, Tenerife. 
2010. N. Barton. TBM tunnel collapses in mountain areas. Invited. Chinese Academy of Science, Beijing. 
2010. N.Barton. Shear wave anisotropy, fast axis questions. AAPG, Rome 
2011. N. Barton. Empiricism, theory, problem solving. 6th Muller Lecture, ISRM Cong. Beijing. 
2011. N. Barton1. Pregrouting, water control, property improvement. 10th Nonvellier, Zagreb. 
2012. N. Barton. Reduce risk. TBM, D+B, in same tunnel, hybrid. Chinese Acad. of Eng. Wuhan. 
2013. N. Barton and E. Quadros. Anisotropy everywhere, to see, to measure. Keynote. Potsdam. 
2013. N. Barton. Rock engineering challenges, hydropower, solutions. Keynote. Waknaghat. 
2014. N. Barton. Lessons learned, Q, tunnel and cavern design, performance. Athens. 
2014. N. Barton. Shear strength of rock, rock joints, rock masses. Keynote. Vigo. 
2015. N. Barton and N. Bar. Qslope method for civil and mining engineering. Eurock, Salzburg, Austria. 
2015. N. Barton. Forty years with the Qsystem  lessons and developments. Keynote, Hong Kong, IoM3. 
2015. N. Barton. Lessons, empirical methods, mining. Keynote, Empirical Methods in Mining. Lima. 
2015. N.Barton. Nonlinear rock mechanics, linear geomechanics, gas shales. Keynote. Wuhan. 
2016. N. Barton. Nonlinear shear strength for geomechanics. ARMA, 50th US Rock Mechanics, Houston. 
2016. N. Barton. Stress, strain, strength, structure, Q and beyond. Keynote. Eurock, Cappadocia. 
2017. N. Barton and B. Shen. Tunnels, cliffs, mountains. ARMA. San Fransisco. 
2017. N. Barton. Rock as the construction material for tunnels. WTC, Bergen. 
2017. Barton, N. TBM in difficult conditions. Keynote lecture, TBM DIGs, Wuhan. 
2017. N. Barton. Lessons, large failures, adverse design, geology or support. Keynote, Capetown. 
2017. N. Barton. Minimising use of concrete, comparing NMT and NATM. 
2018. N. Barton. The Next Half Century of RQD. Sao Paulo, 2018. 
2018. N. Barton. TOC Thermal OverClosure behaviour. CouFrac, Wuhan. Invited Lecture. 
2018. N. Barton. St. Petersburg keynote on Career choice. May. 
2019. N. Barton. Failure modes, tunnels, cliffs, mountains. Keynote, Cochabamba, Bolivia, July. 
2020. Barton, N. Failure modes, tunnels, cliffs, mountains, and Qslope. U. of Leeds. 7.2.2020. 
2020. Barton, N. Many faces of Q. BGA 5.2.2020. 
2021.Barton and Quadros, Details of NMT. 5th CBT Sao Paulo. 
2021.Barton, N. Continuum or discontinuum GSI or JRC. Malaysia keynote. 
2021.Barton, N. New ideas about failure modes. Bergmekanikkdag, Oslo. 
2021.Barton, N. Suklje lecture, Slovakian Geotech. Soc. 
2022. Cliffs, coastal erosion, mountains. GeoEarth 3rd Symp. Barcelona 
2022. Continuum or discontinuum KOLKATA 9th Asian Mining Congress, keynote 
2022. Soft Rocks Symp. ISRM. Ohrid, Macedonia 













