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Edelbro, Catrin
Publications (10 of 20) Show all publications
Nilsson, M., Edelbro, C. & Edström, K. (2016). Adapting CDIO to Civil Engineering: Investigate - Plan - Desig - Construct - Operate and Maintain (ed.). In: (Ed.), Jerker Björkqvist; Kristina Edström; Ronald J. Hugo; Juha Kontio; Janne Roslöf; Rick Sellens; Seppo Virtanen (Ed.), The 12th International CDIO Conference: Proceedings – Full papers. Paper presented at International CDIO Conference : 12/06/2016 - 16/06/2016 (pp. 164-172). Turku
Open this publication in new window or tab >>Adapting CDIO to Civil Engineering: Investigate - Plan - Desig - Construct - Operate and Maintain
2016 (English)In: The 12th International CDIO Conference: Proceedings – Full papers / [ed] Jerker Björkqvist; Kristina Edström; Ronald J. Hugo; Juha Kontio; Janne Roslöf; Rick Sellens; Seppo Virtanen, Turku, 2016, p. 164-172Conference paper, Published paper (Refereed)
Abstract [en]

The aim of this paper is to propose an alternative expression for engineering practice in thecontext of the civil engineering and built environment sector. Our first objective is todemonstrate that the CDIO approach can, with these modifications, be applied in developingcivil engineering and built environment programs. Our second objective is to showcase theadaptability of the CDIO approach, thereby encouraging other thoughtful modifications andtransformations. We outline the ideas underpinning the original expression, and identify therole it plays in the CDIO methodology for curriculum development. Taking these factors intoaccount, a modified expression is proposed to describe the engineering process in civilengineering and built environment. We divide the process into ‘investigation – planning –design – construction – operation and management’. Further, to ‘products, processes andsystems’, we propose the addition of ‘environments’.

Place, publisher, year, edition, pages
Turku: , 2016
Series
Turku University of Applied Sciences, ISSN 1796-9964 ; 45
Keywords
Social sciences - Pedgogical work, Skill development, Self-regulated learning, independent learning strategy, learning objectives, Socialvetenskap - Pedagogiskt arbete
National Category
Infrastructure Engineering Other Civil Engineering
Research subject
Structural Engineering; Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-39918 (URN)ed8c6ad1-513f-44e5-bd46-8033d6834a6b (Local ID)9789522166104 (ISBN)9789522166104 (ISBN)ed8c6ad1-513f-44e5-bd46-8033d6834a6b (Archive number)ed8c6ad1-513f-44e5-bd46-8033d6834a6b (OAI)
Conference
International CDIO Conference : 12/06/2016 - 16/06/2016
Note
Godkänd; 2016; 20160622 (andbra)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-03-26Bibliographically approved
Umar, S. B. & Edelbro, C. (2016). Influence of large-scale structures on the stability of the hangingwall in a caving mine: a modeling study. International Journal of Mining and Mineral Engineering, 7(4), 294-312
Open this publication in new window or tab >>Influence of large-scale structures on the stability of the hangingwall in a caving mine: a modeling study
2016 (English)In: International Journal of Mining and Mineral Engineering, ISSN 1754-890X, E-ISSN 1754-8918, Vol. 7, no 4, p. 294-312Article in journal (Refereed) Published
Abstract [en]

The Printzsköld orebody in the Malmberget mine of NorthernSweden is currently under production and is centrally located in the miningarea. The effects of the on-going sublevel cave-mining in this orebody arecurrently investigated with respect to cave development with an initialemphasis on the effects of stress redistribution and potential rock massyielding. In this study, three-dimensional discontinuum modelling of thePrintzsköld orebody is presented, in which the effect of three pre-existinglarge-scale geological structures have been studied. The results of the presentstudy showed low stress build-ups in the crown pillar and cave bottom, due toshear slip developing along the structures. The presence of large-scalestructures has no significant effects on the far-field stresses as shear slip alongthese structures is confined to cave boundaries. An analysis of the shearstrength of the structures showed larger effects of slip on reducing frictionangle than the reduction of cohesion.

Place, publisher, year, edition, pages
InderScience Publishers, 2016
Keywords
Large-scale structures, shear slip, Printzköld orebody, failure mechanism, numerical analysis
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-63680 (URN)10.1504/IJMME.2016.10000783 (DOI)
Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-11-24Bibliographically approved
Barbens, P., Uotinen, L., Toivanen, T. & Edelbro, C. (2014). Improving teaching methods of rock mass classification parameters (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. 451-455). : CRC Press
Open this publication in new window or tab >>Improving teaching methods of rock mass classification parameters
2014 (English)In: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses / [ed] R. Alejano, CRC Press, 2014, p. 451-455Conference paper, Published paper (Refereed)
Abstract [en]

To promote knowledge in rock mass classification methods, a short course was arranged in research tunnels beneath Aalto University in Espoo, Finland. After the course, the participants had a short (45+45 min) hands-on tunnel mapping exercise where they logged 12 core boxes and one 10 m tunnel wall section. The attendees were asked to submit their mapping sheets for a post-study. The objective of the study was to discover which parameters show most scatter and to develop suggestions to improve the teaching methods. Statistical analysis of the data was carried out and RQD parameter was analyzed in more detail as it had the largest amount of data. Insufficient logging time may be one of the causes for the lack of data for other parameters. Significant scatter was observed in the RQD parameter and the comparison between inexperienced and experienced mappers show no clear difference. The teaching arrangements and problems faced are stated and recommendations on how to improve the situation are presented

Place, publisher, year, edition, pages
CRC Press, 2014
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-32852 (URN)779448ff-8dc9-4881-9371-34c2477e26f4 (Local ID)9781138001497 (ISBN)779448ff-8dc9-4881-9371-34c2477e26f4 (Archive number)779448ff-8dc9-4881-9371-34c2477e26f4 (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
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
Nilsson, M., Edelbro, C. & Sharrock, G. (2012). Small scale joint surface roughness evaluation using digital photogrammetry (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 >>Small scale joint surface roughness evaluation using digital photogrammetry
2012 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

This paper presents a procedure on how photogrammetry by simple means can be used to create a joint surface profile using standard off-the-shelf equipment. The results are presented as a step by step instruction ranging from imaging of a rock sample to validation of the acquired data to preparation of a numerical model. Imaging is performed using a camera with a fixed lens in combination with the photogrammetry software 3DM CalibCam and 3DM Analyst. Surface data validation is carried out by means of laser scan in order to create a reference surface for local coordinate comparison to the photogrammetry data terrain model (DTM). The photogrammetry data is proven to be accurate on a scale smaller than one millimetre and a numerical shear-box model is prepared using the profiles as input. Surface evaluation show no clear indication that any part of the surface would be less accurately imaged due to directional bias as the areas of deviation are evenly spread across the sample. Profiles derived from photogrammetry are related to JRC. Calibration of the shear-box model is on-going; no numerical results are included in this paper.

National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-34202 (URN)8561d7d2-4dea-4923-b475-7d71620010e7 (Local ID)8561d7d2-4dea-4923-b475-7d71620010e7 (Archive number)8561d7d2-4dea-4923-b475-7d71620010e7 (OAI)
Conference
Eurock 2012 : Rock Engineering and Technology for Sustainable Underground Construction 25/05/2012 - 27/05/2012
Note
Godkänd; 2012; 20120608 (miknil)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Edelbro, C. (2012). Validation of numerical analysis: a feasibility study (ed.). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Validation of numerical analysis: a feasibility study
2012 (English)Report (Other academic)
Alternative title[sv]
Validering av numeriska analyser : En förstudie
Abstract [sv]

Syftet med denna förstudie var att öka förståelsen för var, vad, när och hur mätningarna bör utföras för att kunna validera numeriska analyser. Detta arbete har fokuserat på validering av befintliga materialmodeller och programvaror som används av LKAB för bergmekaniska analyser. Sekundära spänningar orsakade av gruvdriften, deformationer och plasticering runt fältorter i liggväggen i Kiirunavaara gruva har studerats.Baserat på denna förstudie kan man dra slutsatsen att det är fördelaktigt att utföra mätningar i orter som ligger nära malmkontakten. Bergmassans hållfasthet hade en stor påverkan på resultatet av de beräknade spänningarna, deformationerna och storleken på den plasticerade zonen. Young's modul hade en stor påverkan på deformationerna, särskilt för låga värden på styvheten.Den bästa positionen att mäta spänningar på i fältorter visade sig vara i taket och det är nödvändigt att installera utrustningen i taket när produktionen är (eller öppningen har börjat) två nivåer ovanför den studerade orten. Om spänningarna ska mätas i andra riktningar är det viktigt att installera utrustningen när produktionen ska börja tre nivåer ovanför den studerade orten för att kunna studera alla stora förändringar som sker orsakade av gruvdriften.Det nedre högra hörnet (i motsatt riktning till malmkontakten) är den lämpligaste platsen för övervakning både x-och y-förskjutningen. Utrustningen för att mäta deformationer/förskjutningar bör installeras i den studerade orten när produktionen har påbörjats en till två nivåer ovanför.De bästa positionerna att mäta skadezonen (EDZ) är i väggarna. Hur än om det är spänning, deformation eller EDZ som ska övervakas så behöver installation av sådan utrustning finnas med i gruvkartan redan då orten planeras. Förslaget på framtida arbete är att starta ett valideringsprojekt.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2012. p. 72
Series
Technical report / Luleå University of Technology, ISSN 1402-1536
Keywords
Materials science - Construction materials, Civil engineering and architecture - Geoengineering and mining engineering, rock mass, stability, footwall drift, Kiirunavaara mine, Teknisk materialvetenskap - Konstruktionsmaterial, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-24966 (URN)d3fbecae-6778-49d2-b663-9403c379eecb (Local ID)978-91-7439-465-8 (ISBN)d3fbecae-6778-49d2-b663-9403c379eecb (Archive number)d3fbecae-6778-49d2-b663-9403c379eecb (OAI)
Note
Godkänd; 2012; 20120702 (carik)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Edelbro, C. (2010). Different approaches for simulating brittle failure in two hard rock mass cases: a parametric study (ed.). Paper presented at . Rock Mechanics and Rock Engineering, 43(2), 151-165
Open this publication in new window or tab >>Different approaches for simulating brittle failure in two hard rock mass cases: a parametric study
2010 (English)In: Rock Mechanics and Rock Engineering, ISSN 0723-2632, E-ISSN 1434-453X, Vol. 43, no 2, p. 151-165Article in journal (Refereed) Published
Abstract [en]

One of the aims of rock mechanics analysis is to predict fallouts in underground excavations. The objective of this paper was to study the relative importance of different strength parameters and their significance on the simulation of brittle failure and fallouts. This work was conducted as a parametric study, using numerical modelling and a number of approaches. The results were compared with observed fallouts. More obvious and distinct shear bands could be observed with decreased element sizes close to, and at, the boundary. The maximum shear strain was the most reliable indicator for fallout prediction. The results of the (instantaneous) cohesion softening friction softening models were sensitive to changes of the peak strength parameters and less sensitive to variations in residual parameters. The result from the cohesion-softening friction-hardening (CSFH) model, when using a peak cohesion equal to the intact rock strength, best captured the observed rock behaviour.

National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-7341 (URN)10.1007/s00603-008-0025-x (DOI)000275659100003 ()5b714f40-0e3d-11de-b3bc-000ea68e967b (Local ID)5b714f40-0e3d-11de-b3bc-000ea68e967b (Archive number)5b714f40-0e3d-11de-b3bc-000ea68e967b (OAI)
Note
Validerad; 2010; 20090311 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Edelbro, C. & Sandström, D. (2009). Interpretation of failure and fallouts based on numerical modelling of an underground mine stope (ed.). In: (Ed.), John A. Hudson; George Tham; Xia-Ting Feng; Alan Kwong (Ed.), Proceedings of the ISRM-sponsored International Symposium on Rock Mechanics: "Rock Characterisation, Modelling and Engineering Design Methods" : SINOROCK2009. Paper presented at International Symposium on Rock Mechanics : 19/05/2009 - 22/05/2009. Hong Kong: International Society for Rock Mechanics
Open this publication in new window or tab >>Interpretation of failure and fallouts based on numerical modelling of an underground mine stope
2009 (English)In: Proceedings of the ISRM-sponsored International Symposium on Rock Mechanics: "Rock Characterisation, Modelling and Engineering Design Methods" : SINOROCK2009 / [ed] John A. Hudson; George Tham; Xia-Ting Feng; Alan Kwong, Hong Kong: International Society for Rock Mechanics , 2009Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Hong Kong: International Society for Rock Mechanics, 2009
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-27537 (URN)107a7800-e8c0-11de-bae5-000ea68e967b (Local ID)978-962-8014-17-0 (ISBN)107a7800-e8c0-11de-bae5-000ea68e967b (Archive number)107a7800-e8c0-11de-bae5-000ea68e967b (OAI)
Conference
International Symposium on Rock Mechanics : 19/05/2009 - 22/05/2009
Note
Godkänd; 2009; 20091214 (carik)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Edelbro, C. (2009). Numerical modelling of observed fallouts in hard rock masses using an instantaneous cohesion-softening friction-hardening model (ed.). Paper presented at . Tunnelling and Underground Space Technology, 24(4), 398-409
Open this publication in new window or tab >>Numerical modelling of observed fallouts in hard rock masses using an instantaneous cohesion-softening friction-hardening model
2009 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, E-ISSN 1878-4364, Vol. 24, no 4, p. 398-409Article in journal (Refereed) Published
Abstract [en]

The work presented in this paper focuses on compressive stress-induced brittle fallouts in hard rock masses, which are massive or sparsely fractured and subjected to intermediate to high in situ stresses. The results of numerical modelling, using a linear-elastic, brittle plastic material model with cohesion-softening friction-hardening (CSFH) behaviour, were compared with observed fallouts for six cases. The objective was to study how well the results of a CSFH model agrees with observed fallouts with respect to location, depth, and shape. All six cases were well documented with respect to virgin stresses, fallout characteristics, rock mass properties, and rock behaviour. The modelling results showed that shear strain localization (shear bands) developed for all cases. The depth of the intersected shear bands were used as a fallout indicator. Furthermore, the location and shape of the observed fallouts could be predicted fairly accurately. The predicted fallout depth was in good agreement with observed fallouts for three of the cases. Using both yielded elements and intersecting shear bands as fallout indicators results in a better prediction of fallout than using just one indicator.

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-4019 (URN)10.1016/j.tust.2008.11.004 (DOI)000266225800004 ()2-s2.0-64849110224 (Scopus ID)1dff6300-e245-11dd-981b-000ea68e967b (Local ID)1dff6300-e245-11dd-981b-000ea68e967b (Archive number)1dff6300-e245-11dd-981b-000ea68e967b (OAI)
Note
Validerad; 2009; 20090114 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Edelbro, C. (2009). Tryckspänningsreducerade utfall i bergmassor (ed.). In: (Ed.), (Ed.), Föredrag vid Bergmekanikdag i Stockholm 9 mars 2009: . Paper presented at Bergmekanikdag 2009 : 09/03/2009 - 09/03/2009 (pp. 57-67). : Stiftelsen bergteknisk forskning - Befo
Open this publication in new window or tab >>Tryckspänningsreducerade utfall i bergmassor
2009 (Swedish)In: Föredrag vid Bergmekanikdag i Stockholm 9 mars 2009, Stiftelsen bergteknisk forskning - Befo , 2009, p. 57-67Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Stiftelsen bergteknisk forskning - Befo, 2009
Series
Bergmekanikdag Stockholm, ISSN 0281-4714
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-38889 (URN)d702efb0-3895-11de-9b53-000ea68e967b (Local ID)d702efb0-3895-11de-9b53-000ea68e967b (Archive number)d702efb0-3895-11de-9b53-000ea68e967b (OAI)
Conference
Bergmekanikdag 2009 : 09/03/2009 - 09/03/2009
Note
Godkänd; 2009; 20090504 (ysko)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
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