Project Fact Sheets

Cutsheets

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Kevitsa Rock Mechanics Study Finland Itasca Consultants AB, Itasca S.A.
As part of the new strategic plan for the Kevitsa open pit mine, Itasca evaluated the large-scale slope stability, including dewatering requirements,  and reviewed teh bench slope design. The work also comprised recommendations on data collection and monitoring, and was done in cooperation with Itasca S.A. (Chile). 
Mining 2017


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Rock Mechanics Pre-Feasibility Studies Sweden Itasca Consultants AB
Conceptual/pre-feasibility rock mechannics studies for open pit and underground mines.
Mining 2017


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Investigation of Mine Access Tailings Storage in an Open Pit Finland Itasca Consultants AB
Study on open pit mine access possibilities to enable in-pit storage of tailings, including concrete concrete sealing of the mined part of the crown pillar, as well as a bulkhead in a drift below the pit.
Mining 2017


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Geometry Model for the Follo Line Norway Itasca Consultants AB
The Follo Line project is the largest railway project in Norway in modern times, comprising a high-speed railway partly in tunnel from the traffic hub at Ski to Oslo central station. Itasca has assisted by creating a geometry model for numerical analysis, and for use by SINTEF. 
Civil 2016


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Kiruna Seismicity and Modeling Sweden Itasca Consultants AB
The Kiirunavaara Mine is undergoing a national permitting process concerning a desired increased production rate. An important question for this process is: will the increased production rate result in changes to vibrations in the town due to seismicity  Itasca conducted three-dimensional modeling and analysed historic seismicity to be able to could make judgements about the influence of the planned production on future seismicity. 
Mining 2017


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Cave Modeling and Ground Deformations Sweden Itasca Consultants AB

3D cave modeling of underground sublevel cave mining and prediction of mining-induced ground deformations. 

Mining 2017


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Back-Analysis of Initial Stress Case Study Sweden Itasca Consultants AB

3D discontinuum modeling of an underground railroad station for back-analysis of the initial stress state at shallow depth. 

Civil 2016


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Regional-Scale Stress Model of Stockholm Sweden Itasca Consultants AB

3D discontinuum stress modeling of the Stockholm region to better understand stress conditions near existing large-scale structures, as part of the design work for new metro lines in Stockholm. 

Civil 2016


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3D-Analysis of the Stockholm By-Pass Road Tunnel Sweden Itasca Consultants AB

A new motorway west of Stockholm linking the north and south side of Stockholm is under development – the so-called "Stockholm By-Pass" ("Förbifart Stockholm"). The new link is a 21 km long highway, of which 18 km is in tunnels. At the interchange of Lovön, four intake and exhaust air stations are planned, being in close proximity to the main tunnels and ramps. In this area, there is also a deformation zone going through the intake and exhaust air station.

Civil 2014


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Long Term Cavern Stability of the SFR Facility Sweden Itasca Consultants AB

A numerical analysis was conducted to assess the long term stability of the rock caverns BMA and BLA for the final repository of low and middle level nuclear waste at the SFR facility in Forsmark, Sweden. The objective was to analyze if there exists a long term risk for an ongoing loosening of the rock mass up to the surface due to degradation and weathering of the rock mass adjacent to the walls of the rock caverns.

Civil, Power Generation 2012


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Rock Mechanics Analysis for Crown Pillar Extraction Ireland Itasca Consultants AB

Analysis of crown pillar extraction for the Tara mine, including 3D continuum and discontinuum modeling. 

Mining 2017


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Bench Stability Analysis Sweden Itasca Consultants AB

Bench stability analysis for the Björkdal mine, to ensure safe working conditions in the pit. 

Mining 2016


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Design Guidlines for Rock Excavations Sweden Itasca Consultants AB

Development of a handbook and design guidelines for railroad and road tunnels, as well as tunnel portals for the Swedish Transport Administration.

Civil 2015


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Extraction of Crown Pillar in Kittilä Finland Itasca Consultants AB

Extraction of the crown pillar separating the open pit from the underground mining was to be conducted as a part of the transition from open pit to underground mining at the Kittilä mine.

Mining 2014


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El Teniente Fragmentation Study Chile Itasca Consultants AB

Fragmentation is an important aspect of all block caving operations. The primary fragmentation can be difficult to assess, in particular in complex geological environments, and for rock masses subjected to varying stress as is normally the case in block caving.

Mining 2013


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Stress Modeling Malmberget Sweden Itasca Consultants AB

LKAB plans to increase the production in Malmberget mine to 20 million metric tons of iron ore per year. The objective of this work was to create a detailed model of all orebodies to study the stress situation with continued ore production at depth. Itasca constructed a three-dimensional mine-scale model for the Malmberget mine, including all orebodies (active and previously mined). The model was created in the CAD-program Rhino and using the element generator KUBRIX and analyses were conducted with FLAC3D.

 

Mining 2013


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Numerical Modeling of Mining Sequences and Seismicity Sweden Itasca Consultants AB

Mining-induced seismicity is one of the most serious rock mechanics problems in sublevel caving in the LKAB mine in Kiruna. In this project, alternative mining sequences for a portion of the mine have been simulated using a three-dimensional numerical model. Large-scale geological structures have been explicitly included in the model to simulate the occurrence of "fault slip" type seismic events. Calculations have been conducted using 3DEC.

Mining 2012


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Laver Rock Mechanics Pre-Feasibility Study Sweden Itasca Consultants AB

Rock mechanics pre-feasibility study for large-scale open pit mining of the Laver low-grade copper deposit in northern Sweden, including data collection, geomechanical modeling and developing design pit slope design criteria. 

Mining 2013


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Operational Open Pit Rock Mechanics Sweden Itasca Consultants AB

Rock mechanics technical support for open pit operations in northern Sweden, including site inspections, drill-and-blast optimization, etc. 

Mining 2017


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Rock Mechanics Support for the Dannemora Mine Sweden Itasca Consultants AB

Technical support to the Dannemora Mine, including rock mechanics expertise for mine planning including mining sequences for different mining levels, location of ramps, rehab of re-opened areas,, as well as provideing short training courses in rock mechnics for mine engineers, geologist and shift crews. 

Mining 2014


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System Design of Underground Facility for Spent Nuclear Fuel Storage Sweden Itasca Consultants AB

The design of the final nuclear repository design has been initiated by SKB and as a first step the system design of the underground facility has been executed. Itasca has taken part in the project with responsibility over rock mechanical problems and analyses. The work included support of layout decisions through analyses and rock mechanical expertise. The analyses with FLAC and FLAC3D were mainly focused on the rock stress redistributions around the facility. The work involved finding the amount of tunnels and shafts in different rock domains, as well as necessary rock reinforcements. The system design work also included risk analysis of the project.

Civil, Power Generation 2012


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Ore Pass Design - A Modeling Study Sweden Itasca Consultants AB

The LKAB mining company is currently carrying out investigations for a potential continued mining at depth in the Malmberget mine. Part of this work involves design of ore passes. The ore passes are a vital part of the transportation chain, and has, historically, been subject to extensive instabilities leading to closing and re-development of ore passes. The objective of this project was to: (i) validate rock mass strength and stress state, and (ii) determine the optimal orientation and location of ore passes with respect to the effects of wear (geometrical changes) and stress-induced failures in the ore pass walls.

Mining 2015


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Norra Länken 3D Stability Analysis Sweden Itasca Consultants AB

The Northern Link (Norra Länken) will be part of a major road system surrounding the Stockholm metropolitan area. As part of the design work for this project, Itasca Consultants AB and Itasca Consultants S.A.S. has performed a three-dimensional numerical study to analyze of the effect of a large surface load being applied on top of a tunnel intersection with low (4 m) rock cover. 

Civil 2012


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Estimation of Fracture Shear Displacements due to Slot Excavation Sweden Itasca Consultants AB

This project comprised three-dimensional discontinuum modeling of the slope excavation at the Äspö HRL, in order to determine the induced joint shear displacements. 

Civil, Power Generation 2015


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Tunneling in Mixed Face Conditions Sweden Itasca Consultants AB

Tunneling in mixed face conditions (rock-soil) was studied in a reasearch project for BeFo (Swedish Rock Engineering Research Foundation), with the aim to incrtee the knowledge and better understand deformations mechanisms for tunneling under these conditions. The work comprised a generic sensitivity study and a case study of the tunnel passage under the Maria Magdalena Church in Stockholm, using two- and three-dimensional numerical modeling. 

Civil 2015


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Improved Blasting through Precise Initiation Sweden Itasca Consultants AB

Using blasting caps with electronic delay units, and programmable delay times down to 1 ms, it has become possible to employ wave superposition in rock blasting. It has been hypothesized that fragmentation is improved in areas between blastholes where the tensile waves meet, overlap and interact. An improved fragmentation can, in turn, result in reduced costs for both blasting and transportation of the blasted rock, improved environmental aspects, and reductions in energy consumption during crushing and grinding of the blasted rock, as well as improved metal recovery. In this project, the above hypothesis was further studied in conjunction with developing computational tools for simulation of blasting with electronic programmable delay caps.

Mining 2013