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Sjöberg, Jonny
Publications (10 of 28) Show all publications
Vatcher, J., McKinnon, S. D. & Sjöberg, J. (2016). Developing 3-D mine-scale geomechanical models in complex geological environments, as applied to the Kiirunavaara Mine (ed.). Paper presented at . Engineering Geology, 203, 140-150
Open this publication in new window or tab >>Developing 3-D mine-scale geomechanical models in complex geological environments, as applied to the Kiirunavaara Mine
2016 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 203, p. 140-150Article in journal (Refereed) Published
Abstract [en]

An understanding of the relationship between the geological environment and rock mass behaviour induced by mining activities can lead to hazard reduction through knowledge-based design. However, characterisation of complex and heterogeneous rock masses that typify mining environments is difficult. A methodology to characterise these types of rock masses, based largely on classical statistics, geostatistics and an extension of previous quantitative structural domaining work, is presented and applied to the Kiirunavaara Mine, Sweden. In addition to a new perspective on intact rock strengths of geological units at the mine, a correlation was found between modelled volumes of clay, modelled RQD, newly identified structural domains and falls of ground. These relationships enabled development of a conceptual model of the role of geology in rock mass behaviour at the mine. The results demonstrate that the proposed methodology can be useful in characterisation of complex rock masses.

National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-15752 (URN)10.1016/j.enggeo.2015.07.020 (DOI)000372688600013 ()2-s2.0-84959078881 (Scopus ID)f4c80667-0515-4110-b909-6cdbc900ee6a (Local ID)f4c80667-0515-4110-b909-6cdbc900ee6a (Archive number)f4c80667-0515-4110-b909-6cdbc900ee6a (OAI)
Note
Validerad; 2016; Nivå 2; Bibliografisk uppgift: Special Issue on Probabilistic and Soft Computing Methods for Engineering Geology; 20150806 (jesvat)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Vatcher, J., McKinnon, S. D. & Sjöberg, J. (2014). Mine-scale numerical modelling, seismicity and stresses at Kiirunavaara Mine, Sweden (ed.). In: (Ed.), Marty Hudyma; Yves Potvin (Ed.), Deep mining 2014: proceedings of the seventh international conference on deep and high stress mining :16-18 september 2014, Sudbury, Ontario, Canada. Paper presented at International Conference on Deep and High Stress Mining : 16/09/2014 - 18/09/2014 (pp. 363-376). Nedlands, WA: Australian Centre for Geomechanics
Open this publication in new window or tab >>Mine-scale numerical modelling, seismicity and stresses at Kiirunavaara Mine, Sweden
2014 (English)In: Deep mining 2014: proceedings of the seventh international conference on deep and high stress mining :16-18 september 2014, Sudbury, Ontario, Canada / [ed] Marty Hudyma; Yves Potvin, Nedlands, WA: Australian Centre for Geomechanics, 2014, p. 363-376Conference paper, Published paper (Refereed)
Abstract [en]

LKAB’s Kiirunavaara Mine, located in northern Sweden, has exhibited seismic behaviour since the mining production extended below 700 m depth. Iron ore is mined from the 4.5 km long orebody via sublevel caving at a production rate of 28 million tonnes per annum. The deepest current production level is at approximately 800 m depth, and current mining plans call for mining to about 1200 m depth. It is thus of critical importance for LKAB to gain a deeper understanding of the stress and rock mass behaviour at the mine.The Kiirunavaara orebody has complex geometry and geology, which is represented using the discontinuum distinct element code 3DEC. As part of a larger series of models investigating the influence of strength and structural geology on rock mass behaviour, the results of multiple continuum models are presented. The goals of these continuum models included: i) obtain a better understanding of the virgin stress field and redistribution of stresses caused by mining, ii) further define the extent of mining induced plastic failure, and iii) increase the understanding of existing failure mechanisms at the mine.The elastic and plastic continuum models accurately produced principal stresses similar to measurements recently conducted at two sites in the mine, confirming the previously estimated virgin stress state. Spatial correlations between plastic failure in the model and seismicity in the hangingwall and footwall were found. However, these correlations were not consistent throughout either material for any evaluated set of material properties; either the plastic failure in the footwall or hangingwall corresponded well with seismicity. This may be because a set of rock mass properties which represent rock mass failure at this scale have not been evaluated or that some underlying failure mechanisms causing seismicity are not represented in the models, for example, failure along discontinuities. Some events larger than moment magnitude of 1.2 in the hangingwall, in particular shear source mechanisms events, do not correspond well with plastic failure from the model. These results potentially indicate that geological structures, which are not represented in these models, influence mine behaviour.The improved understanding of input data, rock mass behaviour, and failure mechanisms as a result of these models has a direct impact upon mine excavation design and future rock behaviour investigations, and will be used in the continued research, as well as in mine planning.

Place, publisher, year, edition, pages
Nedlands, WA: Australian Centre for Geomechanics, 2014
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-37263 (URN)b3cb328a-bb40-4dd9-9dc6-0990aefd0973 (Local ID)9780987093790 (ISBN)b3cb328a-bb40-4dd9-9dc6-0990aefd0973 (Archive number)b3cb328a-bb40-4dd9-9dc6-0990aefd0973 (OAI)
Conference
International Conference on Deep and High Stress Mining : 16/09/2014 - 18/09/2014
Note
Godkänd; 2014; 20150612 (jesvat)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Vatcher, J., McKinnon, S. D., Sjöberg, J. & Dahnér, C. (2014). Modelling methodology: Structural geology and rock mass behaviour at Kiirunavaara Mine (ed.). In: (Ed.), R. Alejano (Ed.), Rock Engineering and Rock Mechanics: Structures in and on Rock Masses. Paper presented at ISRM International Symposium EUROCK : 26/05/2014 - 28/05/2014 (pp. 643-648). Leiden: CRC Press
Open this publication in new window or tab >>Modelling methodology: Structural geology and rock mass behaviour at Kiirunavaara Mine
2014 (English)In: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses / [ed] R. Alejano, Leiden: CRC Press, 2014, p. 643-648Conference paper, Published paper (Refereed)
Abstract [en]

Mining induced seismicity and rockbursting significantly increased in the LKAB Kiirunavaara Mine when mining production progressed beyond 700 m depth. Since 2008, significant work has been done at LKAB to better understand their induced seismicity. It has been identified that the majority of seismic events in the mine are likely caused by the interaction of mining excavations and structural geology. Two complimentary PhD projects (funded by LKAB) are underway at Luleå University of Technology to address the cause of the seismicity experienced at the mine, with one concentrating on mine seismology and one on rock mechanics.The rock mechanics project, the focus of this paper, concentrates on quantifying relationships between mining sequences, geomechanical and geological conditions, stress changes and induced seismicity at the mine. A series of numerical models will be developed based on an extensive data acquisition campaign to examine the interaction between the mining and geological systems. The role of structural geology in mine behaviour and its application to mine planning is of particular focus within these models. This paper presents the methodology of the rock mechanics project, including: data acquisition, data analysis, and numerical stress analysis models and modelling techniques

Place, publisher, year, edition, pages
Leiden: CRC Press, 2014
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-28317 (URN)2152ff8d-c664-4fc7-a178-1d801506c3d5 (Local ID)9781138001497 (ISBN)2152ff8d-c664-4fc7-a178-1d801506c3d5 (Archive number)2152ff8d-c664-4fc7-a178-1d801506c3d5 (OAI)
Conference
ISRM International Symposium EUROCK : 26/05/2014 - 28/05/2014
Note
Godkänd; 2014; 20140611 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Yi, C., Johansson, D., Nyberg, U. & Sjöberg, J. (2013). Numerical simulation for the influence of delay time on the rock fragmentation (ed.). In: (Ed.), Pradeep K. Singh; Amalendu Sinha (Ed.), Rock Fragmentation by Blasting, FRAGBLAST 10: Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting. Paper presented at International Symposium on Rock Fragmentation by Blasting : 24/11/2012 - 29/11/2012 (pp. 213-220). Boca Raton, Fla.: CRC Press/Balkema
Open this publication in new window or tab >>Numerical simulation for the influence of delay time on the rock fragmentation
2013 (English)In: Rock Fragmentation by Blasting, FRAGBLAST 10: Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting / [ed] Pradeep K. Singh; Amalendu Sinha, Boca Raton, Fla.: CRC Press/Balkema , 2013, p. 213-220Conference paper, Published paper (Refereed)
Abstract [en]

With the application of electronic detonators and with short delay times, it may be possible to achieve improved fragmentation through stress wave superposition. This hypothesis was studied through a series of small scale laboratory tests. The results from these tests have subsequently been modeled using the numerical FEM code LS-DYNA and the RHT (Riedel-Hiermaier-Thoma) material model, applying a newly developed methodology for three-dimensional computer simulation of blasting. This work also involved simulating initial damage to the rock through previous blasting, and analyzing the resulting effects. The effect of different delay times showed that through a properly chosen delay time, improved fragmentation could be inferred. Moreover, the initial damage (from the previous row) clearly affected the fragmentation; however, the results indicated that longer delay times (in which the stress wave would have passed the boreholes) also resulted in improved fragmentation, implying that stress wave superposition may not be the primary factor governing fragmentation

Place, publisher, year, edition, pages
Boca Raton, Fla.: CRC Press/Balkema, 2013
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-27082 (URN)065f0724-9f5b-4ae8-88f6-aeed8c29455b (Local ID)978-0-415-62143-4 (ISBN)978-0-203-38767-2 (ISBN)065f0724-9f5b-4ae8-88f6-aeed8c29455b (Archive number)065f0724-9f5b-4ae8-88f6-aeed8c29455b (OAI)
Conference
International Symposium on Rock Fragmentation by Blasting : 24/11/2012 - 29/11/2012
Note
Godkänd; 2013; 20121121 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-04-17Bibliographically approved
Umar, S. B., Sjöberg, J. & Nordlund, E. (2013). Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden (ed.). Journal of Earth Sciences and Geotechnical Engineering, 3(4), 147-173
Open this publication in new window or tab >>Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden
2013 (English)In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 3, no 4, p. 147-173Article in journal (Refereed) Published
Abstract [en]

The LKAB Malmberget Mine is mined using sublevel caving. This mining method is cost-effective but results in successive caving of the host rock and mining-induced ground deformations. Consequently, re- locations of residential areas have been in progress in Malmberget ever since iron ore extraction on industrial scale commenced about a century ago. This study seeks to increase the understanding of the intrinsic characteristics of the rock mass governing deformation and caving activities. Rock mass characterizations were done in two selected orebodies — Printzsköld and Fabian. Two drill holes were drilled in each orebody from the surface. Geotechnical core logging was performed using the RMR system. Weakness zones were categorized to determine what role they played in the caving process. Point load testing was conducted for a sampling interval of about 5 m and selected uniaxial compressive strength tests were conducted to calibrate the point load index. Tunnel mapping was conducted in the hangingwall of the Printzsköld orebody. The finite element modeling code Phase2 was used for a sensitivity analysis of rock strength parameters and tostudy factors that may influence initiation of caving of the hangingwall.

Keywords
Mining, induced, subsidence, rock strength, weak zone characterization, Civil engineering and architecture - Geoengineering and mining engineering, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-12137 (URN)b36989b4-f4df-41dd-a08c-31b234d511a0 (Local ID)b36989b4-f4df-41dd-a08c-31b234d511a0 (Archive number)b36989b4-f4df-41dd-a08c-31b234d511a0 (OAI)
Note

Validerad; 2013; 20131129 (sraban)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Sjöberg, J., Schill, M., Hilding, D., Yi, C., Nyberg, U. & Johansson, D. (2012). Computer simulations of blasting with precise initiation (ed.). Paper presented at Eurock 2012 : Rock Engineering and Technology for Sustainable Underground Construction 25/05/2012 - 27/05/2012. Paper presented at Eurock 2012 : Rock Engineering and Technology for Sustainable Underground Construction 25/05/2012 - 27/05/2012.
Open this publication in new window or tab >>Computer simulations of blasting with precise initiation
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2012 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

Using blasting caps with electronic delay units, it has become possible to employ wave superposition in rock blasting. This paper presents computer simulations to investigate the hypothesis that fragmentation is improved in areas between blast holes where the tensile waves meet, overlap and interact. In this study, a numerical methodology using the code LS-DYNA was developed. LS-DYNA is a commercially available multi-purpose finite-element code, which is well suited to various types of dynamic modeling. Two different element formulations were used — Euler formulation in, and close to, the blast hole, and Lagrange formulation in the rock volume farther from the blast hole. The models used have a resolution (element size) of 50 mm and comprise approximately 20 million elements. Single and dual blast hole configurations have been studied, and a methodology to calculate possible fragmentation based on model interpretation was developed. The results showed that the amount of explosives and the blast hole spacing had the largest effect on fragmentation. The effect of varying delay times was small and local, implying that a significant increase in fragmentation should not be expected through wave superposition.

National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-30974 (URN)50062b22-cae4-4e30-8144-cb58eeb9f3a0 (Local ID)50062b22-cae4-4e30-8144-cb58eeb9f3a0 (Archive number)50062b22-cae4-4e30-8144-cb58eeb9f3a0 (OAI)
Conference
Eurock 2012 : Rock Engineering and Technology for Sustainable Underground Construction 25/05/2012 - 27/05/2012
Note
Godkänd; 2012; 20120608 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-04-17Bibliographically approved
Edelbro, C., Sjöberg, J., Dahner-Lindqvist, C. & Malmgren, L. (2012). Prediction and follow-up of failure and fallouts in footwall drifts in the Kiirunavaara mine (ed.). Canadian geotechnical journal (Print), 49(5), 546-559
Open this publication in new window or tab >>Prediction and follow-up of failure and fallouts in footwall drifts in the Kiirunavaara mine
2012 (English)In: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010, Vol. 49, no 5, p. 546-559Article in journal (Refereed) Published
Abstract [en]

A likely result of changes in rock stresses due to progressing mining is an increased number of compressive stress–induced failures. This paper presents the results from numerical analysis and observations of stress-induced fallouts infootwall drifts in the Kiirunavaara underground mine. A brittle-plastic cohesion-softening friction-hardening (CSFH) material model was used for simulating brittle fallouts. To account for mining-induced stress changes, the local model stress boundary conditions were extracted from a global model. The rock mass properties were based on field observations in the footwall drifts as well as on results from laboratory testing. A multi-stage analysis was carried out to gradually change the stresses to simulate mining progress. A parametric study was conducted in which strength properties, location, and shape of the footwall drift were varied. Yielded elements and maximum shear strain were used as damage and fallout indicators. The modelling results were sensitive to the shape of the drift. The location of the predicted fallouts was in good agreement with the location of observed fallouts for the case in which the drift roof was simulated flatter than the theoretical cross section. The results indicate that the true shape of the drift is different from the planned one

Keywords
Civil engineering and architecture - Geoengineering and mining engineering, Bergmekanik, Mining, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-4638 (URN)10.1139/t2012-012 (DOI)000303505000004 ()2-s2.0-84860465685 (Scopus ID)29ca456b-92b2-48a6-85b0-741a42347aae (Local ID)29ca456b-92b2-48a6-85b0-741a42347aae (Archive number)29ca456b-92b2-48a6-85b0-741a42347aae (OAI)
Note

Validerad; 2012; 20120412 (carik)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Hobbs, S., Wickramanayake, A., Sjöberg, J., Lindgren, T., Henschel, M. & Fernando, P. (2011). SAR inteferometry with seasonally changing snow cover (ed.). Paper presented at International Workshop on "Advances in the Science and Applications of SAR Interferometry" : FRINGE 2011 Workshop 19/09/2011 - 23/09/2011. Paper presented at International Workshop on "Advances in the Science and Applications of SAR Interferometry" : FRINGE 2011 Workshop 19/09/2011 - 23/09/2011.
Open this publication in new window or tab >>SAR inteferometry with seasonally changing snow cover
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2011 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

Spaceborne radar interferometry is an established and very powerful method of measuring land subsidence over timescales of weeks to years. It has been demonstrated on natural and urban landscapes and is becoming an operational technique with accuracy better than 1 cm yr-1. The technique generally relies on having scatterers (which reflect the radar signal) which have stable properties over the timescale of interest. In some landscapes these scatterers occur naturally. However, at high latitudes there are particular difficulties because of the strong seasonal variation in the landcover – snow cover in particular can vary dramatically over periods of weeks to months – and the satellite orbits have particular features which are not generally significant at lower latitudes. It is unlikely that natural scatterers will be stable over long periods in these areas. The aim of this project is to develop methods of SAR interferometry suitable for use in landscapes with seasonal snow cover. The project has two themes: (1) improved understanding of SAR imaging at high latitudes and the use of interferometry in such landscapes, and (2) the development of artificial radar targets which can provide the necessary stability for long-term surface deformation monitoring. The sponsor runs a large mining operation at high latitudes. The study has a practical focus and is part of a larger project to provide a mining subsidence monitoring service for the sponsor. The project’s aim is to achieve accurate monitoring of subsidence using radar interferometry at high latitudes. Techniques developed should be suitable for operational use. Test site The experiment test site is centred on the town of Kiruna in northern Sweden (67° 51’ N, 20° 13’ E). The ground is covered with snow (to a depth of 1 m or more) from October to May each year, and so the winter and summer periods have very different land cover properties. The site includes the town of Kiruna, a large mine, and areas of natural sparse forest with mainly birch and some coniferous trees up to several metres tall. Datasets Available Several datasets are available to support the research, these include: • GPS measurements from a network of control points • General weather observations • Mapping data for land cover / land use and topography • SAR images at approximately monthly intervals from 2009 (Radarsat-2, using up to 3 satellite tracks for imaging) • A network of corner reflectors across the test area The core data analysis tool is the MDA software package designed for processing Radarsat images (for both backscatter and interferometric products). The key resource for the research is the time series of high resolution SAR images suitable for interferometric processing, which allows seasonal changes in backscatter to be observed directly. Methodology The project requires a mix of simulation and practical design and fieldwork. The main contributions will be in the area of target specification, design and validation. Achievements to date The project started late in 2009 and the main emphasis so far has been to establish the datasets needed for the research. Radarsat-2 images have been acquired and are being processed to derive interferometric products and to register them to standard projections compatible with each other and ancillary data. Field observations complementing the satellite imaging are also being made. Acknowledgements The project is sponsored in full by the LKAB mining company.The project also benefits from technical advice of MDA.

National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-39424 (URN)e2ee2478-d6aa-4aad-ade1-52c1282b4812 (Local ID)e2ee2478-d6aa-4aad-ade1-52c1282b4812 (Archive number)e2ee2478-d6aa-4aad-ade1-52c1282b4812 (OAI)
Conference
International Workshop on "Advances in the Science and Applications of SAR Interferometry" : FRINGE 2011 Workshop 19/09/2011 - 23/09/2011
Note
Godkänd; 2011; 20111205 (tore)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Edelbro, C., Sjöberg, J. & Nordlund, E. (2007). A quantitative comparison of strength criteria for hard rock masses (ed.). Paper presented at . Tunnelling and Underground Space Technology, 22(1), 57-68
Open this publication in new window or tab >>A quantitative comparison of strength criteria for hard rock masses
2007 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, E-ISSN 1878-4364, Vol. 22, no 1, p. 57-68Article in journal (Refereed) Published
Abstract [en]

Knowledge of the rock mass strength is important for the design of all types of underground excavations. A frequently applied approach for estimation of the rock mass strength is through an empirical failure criterion, often in conjunction with rock mass classification/characterisation systems. This paper presents a review of existing methods to estimate the rock mass strength using empirical failure criteria and classification/characterisation systems—in this study, commonly denoted as estimation methods. A literature review of existing methods is presented, after which a set of methods were selected for further studies. The selected methods were used in three case studies, to investigate their robustness and quantitatively compare the advantages and disadvantages of each method. A Round Robin test was used in two of the cases. The case studies revealed that the N, Yudhbir-RMR76, RMi, Q-, and Hoek–Brown-GSI methods, appeared to yield a reasonable agreement with the measured strengths. These methods are thus considered the best candidates for realistic strength estimation, provided that care is taken when choosing values for each of the included parameters in each method. This study has also clearly shown the limits of presently available strength estimation methods for rock masses and further work is required to develop more precise, practical, and easy-to-use methods for determining the rock mass strength. This should be based on the mechanical behaviour and characteristics of the rock mass, which implies that parameters that consider the strength of intact rock, block size and shape, joint strength, and physical scale, are required.

National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-6593 (URN)10.1016/j.tust.2006.02.003 (DOI)000242423900007 ()2-s2.0-33749991807 (Scopus ID)4d7d8110-78c6-11db-962b-000ea68e967b (Local ID)4d7d8110-78c6-11db-962b-000ea68e967b (Archive number)4d7d8110-78c6-11db-962b-000ea68e967b (OAI)
Note
Validerad; 2007; 20061120 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Marklund, P.-I., Sjöberg, J., Ouchterlony, F. & Nilsson, N. (2007). Improved blasting and bench slope design at the Aitik mine (ed.). In: (Ed.), Yves Portvin (Ed.), Slope Stability 2007: Proceedings of the International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering. Paper presented at International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering : 12/09/2007 - 14/09/2007. Broadway, Nedlands, W.A: Australian Centre for Geomechanics
Open this publication in new window or tab >>Improved blasting and bench slope design at the Aitik mine
2007 (English)In: Slope Stability 2007: Proceedings of the International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering / [ed] Yves Portvin, Broadway, Nedlands, W.A: Australian Centre for Geomechanics, 2007Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Broadway, Nedlands, W.A: Australian Centre for Geomechanics, 2007
Keywords
Civil engineering and architecture - Geoengineering and mining engineering, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-30456 (URN)44720790-7bd0-11dc-a72d-000ea68e967b (Local ID)978-0-9756756-8-7 (ISBN)44720790-7bd0-11dc-a72d-000ea68e967b (Archive number)44720790-7bd0-11dc-a72d-000ea68e967b (OAI)
Conference
International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering : 12/09/2007 - 14/09/2007
Note
Godkänd; 2007; 20071016 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
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