Dear clients,

We are delighted to announce that we will be a Gold Sponsor at the Slope Stability Conference. This event will take place in April 11th to 13th in Sevilla. During the 3-day conference, our team will be available to demonstrate, discuss and listen to your feedback at Booth #10, located next to the main entrance of the exhibition hall. We are looking forward to connecting with our customers and networking with prospective clients.

The European Itasca team

puce Consulting

Itasca Consultores SL was asked to analyze the stability of an underground water storage facility in shale ground at 300 m depth. The facility is formed by a set of parallel galleries (200 m long, 5.0 m wide and 6.5 m high) spaced 20 m between walls.

The stability of the pillar between galleries was analyzed first. A FLAC3D model that simulates the strength of a square pillar was calibrated against the Abel-Wilson-Aswin formula for square pillars in weak rock. Once a FLAC3D model was calibrated, the strength of the longitudinal pillar between galleries was analyzed with a plane-strain model; the model is presented in Figure 1, and the stress-strain curved of the longitudinal pillar is presented in Figure 2.

Figure 1. Model for longitudinal pillar strength analyses

               Figure 2. Stress-strain curve for longitudinal pillar

The support designed for the galleries and the junctions between access-galleries and storage-galleries were analyzed with 3D models that simulate the sequential process of excavation, support, and curing of the shotcrete. Curing is simulated with a progressive increase of the stiffness with the face distance (Figure 3), and the stresses in the shotcrete were finally checked with moment-thrust diagrams (Figure 4).

     Figure 3. Liner elements with increasing stiffness

 Figure 4. Moment-Thrust diagram of shotcrete at junction




Itasca Consultants AB (Sweden) has assisted the Boliden Kevitsa open pit mine with stability analysis as input to their strategic plan. A new pit optimization project is undertaken at the Boliden Kevitsa Mine in northern Finland, to investigate an increase in production. In conjunction with this, the geotechnical slope design parameters for the final pit depth, including a possibly deeper pit, need to be analyzed. Our work included assessment of slope stability for future open pit mining at Kevitsa for all scales — from benches to overall slopes, including: (i) total slope angles for final pit depths, (ii) interramp slope angles, (iii) maximum interramp height, (iv) bench slope geometries, (v) recommendations on slope depressurization, and (vi) recommendations for slope monitoring and further data collection. The work demonstrated the current state-of-the-art for both large-scale stability analysis (2D and 3D modeling) and kinematic analysis for benches and interramp slopes, incorporating acquired experiences and knowledge from large open pits worldwide. For the bench and interramp slopes, a combined analysis considering spill length, catchment criteria, and kinematic stability was conducted, and validated against the as-built geometry of the current pit. This work was also presented at the SME Annual Conference in Minneapolis, February 25–28, 2018.

Distribution of von-Mises-Stress after backfill of the first room

Example of Factor-of-Safety calculations

arrow Software

  • Did you know that our software and options are also available on annual lease?
    Leasing products offer two main advantages:

    • Eliminate or reduce capital budget approval delays: You can get your license for only 30% of the price for the perpetual license.
    • Your license is always up-to-date. No need to find budget to upgrade your license.

    Of course, you can still purchase your license and options as before, or monthly lease your license. Contact us for for information!

  • Do not forget to download and install the latest subversion available on our website to enjoy the lastest features!
    The current versions are: FLAC3D 6.00.51, FLAC 8.0.449, 3DEC 5.20.259, UDEC 6.00.329, Griddle 1.00.2, PFC 5.0.35.

Current Updates:









arrow Training & Seminars

Itasca will host introductory training courses in Europe:

FLAC3D/Griddle training course Gelsenkichen, Germany September 2018 Itasca Germany
PFC training course Gelsenkichen, Germany 4th Quarter 2018 Itasca Germany
FLAC3D 6.0 Training course Istanbul, Turkey November 7-9, 2018 Geogrup Insaat

Please visit for full details.

For users who envisage the need for substantial amounts of assistance, consulting support or customized training course are available.
Feel free to contact us if you have specific needs: we adapt our offer to your needs.

arrow Conferences

Past presentations:

ICSL along with Hydrogeology team of Itasca Chile organized in Madrid last December a presentation with the title “Improvements and new methodologies in hydrogeological modelling”. The target of the meeting was an introduction of new tendencies in hydrogeology studies in mining and tunneling projects, characteristics of numerical modelling and knowhow and the importance of underground water in this kind of operations. The presentation was conducted by Felip Ortuño, Principal Hydrogeologist from Itasca Chile.
More than 30 participants assisted to this event and it was a nice meeting were different points of view were discussed.

Felip Ortuño, Principal Hydrogeologist at Itasca Chile during the presentation

Participants during the presentation


Itasca and/or representatives will be attending the following conferences:

18th Hellenic Concrete conference March 29-31, 2018 Athens, Greece

Slope Stability 2018
Jonny Sjöberg appointed Keynote Speaker

April 11-13, 2018 Seville, Spain
Eurock 2018 - Short course May 22-26, 2018 St. Petersburg, Russia
Computational Methods in Water Resources XXII June 3-7, 2018 Saint-Malo, France
Journées Nationales de Géotechnique et de Géologie de l’Ingenieur June 13-15, 2018 Champs-sur-Marne, France
52nd US Rock Mechanics/Geomechanics Symposium June 17-20, 2018 Seattle, USA
DNFE 2018 Conference June 20-22, 2018 Seattle, USA
European Confence on Earthquake Engineering June 18-21, 2018 Thessaloniki, Greece
RocDyn-3 June 25-29, 2018 Trondheim, Norway
17th National Congress on Soil Mechanics and Geotechnical Engineering September 26-28, 2018 Istanbul, Turkey
Road 2 Tunnel Expo October 3-6, 2018 Ankara, Turkey
Caving 2018 October 15-17, 2018 Vancouver, Canada
Itasca Info Day November, 2018 Freiberg, Germany

arrow Recent Publications

Vatcher, H, S.D. Mckinnon & J. Sjöberg - (2018) "Rock mass characteristics and tomographic data", Rock mechanics and rock engineering,

Billaux D., Camusso M. et A. Rollet - (2017) "Stockage de Wittelsheim (France) : modèles numériques pour la prédiction de l’état d’endommagement actuel dans le sel et l’évaluation des flux potentiels de saumure contaminée à long terme". Congrès International de l’Aftes, 2017, Paris.

Perez-Rey, L.R. Alejano, and P. Velasco (October 2017) "Comparison of observational, empirical and 3D discrete numerical methodes to estimate subsidence over longwall coal faces" In AfriRock 2017 Rock Mechanics for Africa-Cape Town - The Southern African Institue of Mininh and Metallurgy , 2-7 October 2017, pp 809-822.

Akinshin, I.; Missal, C.; te Kamp, L.: "Simulation of Pressure and Time-Dependent Behavior of Backfill Material in Numerical Calculations – Simulation des druck- und zeitabhängigen Verhaltens von Versatzmaterial bei numerischen Berechnungen." In: Mining Report – Glückauf, Volume 153, Issue 2, p. 166-172. Bergbau-Verwaltungsgesllschaft mbH, Herne, 2017.

Changping, Y., J. Sjöberg & D. Johansson - (2017) "Numerical modelling for blast-induced fragmentation in sublevel caving mines". In Tunnelling and Underground Space Technology, 68, September 2017, pp. 167–173Paper available on-line 

Follow Itasca:

Linkedin Youtube Twitter google


If you do not wish to receive this newsletter, please click here to unsubscribe.

Itasca Consultants S.A.S
64 Chemin des mouilles
FR-69134 Ecully Cedex

© 2018 Itasca Consultants S.A.S.