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  • 1.
    Christiansson, Rolf
    et al.
    SKB.
    Karlzen, Rickard
    SKB.
    Olsson, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Salo, Jukka-Pekka
    Posiva.
    Lehtola, Kimmo
    ELY Management OY.
    Lyytinen, Tapani
    ELY Management OY.
    How high quality requirements can be met by the tunnelling industry?2010In: Bergsprängningskommitténs 55:e diskussionsmöte, BK 2010, Stockholm, 2010, p. 61-75Conference paper (Other academic)
  • 2.
    Christiansson, Rolf
    et al.
    SKB.
    Olsson, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Nyberg, Ulf
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Niklasson, Bengt
    Skanska Teknik, Göteborg.
    Studier av sprängskador i Äspö-laboratoriet2005In: Bergsprängningskommittén Diskussionsmöte BK 2005, Bergsprängningskommittén , 2005, p. 139-152Conference paper (Other academic)
    Abstract [sv]

    En ny tunnel med 70 m längd byggdes på 450 m djup i Äspölaboratoriet 2003. Det ställdes speciella krav på begränsning av sprängskadezonens djup med hänsyn till planerade experiment.Tunneln drevs med galleri och bågformad låg pall för att minimera sprängskador i sulan. I huvuddelen av tunneln användes initieringsystemet Nonel MS och LP. I de tre sista salvorna av galleriet testades elektroniksprängkapslar. Skonsamhetsgraden för vägg och tak var normal med en tillåten skadezon på 0,3 m. Däremot tillämpades samma skonsamhetsgrad även för botten. I övrigt användes normal sprängteknik och normala sprängämnen som Dynotex 17 och Dynorex.Arbetet följdes noggrant genom dokumentation av utfört arbete. Vibrationsmätningar utfördes på nära håll samt på stort avstånd, 1,5 km från arbetsplatsen. Språng¬skador har undersökts genom sågning och sprickkartering.Föredraget kommer att presentera projektet, framförallt (1) erfarenheter från vibra¬tionsmätningar av samtliga sprängsalvor (noggrannheten i geofonmätningarna; totala antalet spränghål i salvorna; bomsalvor; avståndet från salvorna och geo¬logiska strukturer), (2) P-vågshastigheten i tunnelns närområde, (3) faktorer som påverkar utvecklingen av sprängskador, och (4) förslag på kontrollåtgärder som kan leda till att begränsa skadezonen i praktiskt tunnelarbete.

  • 3. Christiansson, Rolf
    et al.
    Olsson, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Nyberg, Ulf
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Niklasson, Bengt
    Studies of blast damage at the Äspö Hard Rock Laboratory2005In: 3rd European Federation of Explosives Engineers (EFEE) World Conference on Explosives and Blasting, 2005, p. 425-434Conference paper (Refereed)
  • 4.
    Nyberg, Ulf
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Arvanitidis, Ioannis
    Olsson, Mats
    Ouchterlony, Finn
    Large size cylinder expansion tests on ANFO and gassed bulk emulsion explosives2003In: Explosives and blasting technique: proceedings of the EFEE Second World Conference on Explosives and Blasting Technique / [ed] R. Holmberg, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 2003, p. 181-191Conference paper (Refereed)
  • 5.
    Nyberg, Ulf
    et al.
    SveBeFo.
    Arvanitidis, Ioannis
    Ouchterlony, Finn
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Cylinder expansion tests on reference explosives from production2002Report (Other academic)
  • 6.
    Nyberg, Ulf
    et al.
    SveBeFo.
    Fjellborg, Stig
    Olsson, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Ouchterlony, Finn
    Bedömning av sprängskador i ortkontur: vibrationsmätningar, skadeprognoser och sprickkartering i magnetitmalm och gråberg2000Report (Other academic)
  • 7.
    Nyberg, Ulf
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Ouchterlony, Finn
    Bestämning av Gurney- och detonationsenergin för emulsionssprängämnen med hjälp av cylinderförsök2009Report (Other academic)
    Abstract [en]

    Nine cylinder tests for emulsion explosives in expanding Ø100/110 mm copper tubes are reported. The explosive recipe for pure emulsion respectively for blend of ANFO/AN-prills was formulated specifically for Swebrec:s test program. The primary goal was to verify earlier determinations of the explosive energy. In addition, recordings from streak camera and data from contact pins was evaluated for copper tubes 350 mm long and Ø60/72 mm filled with FOX12/TNT. The latter was cooperation between FOI- Swedish Defence Research Agency and Swebrec- Swedish Blasting Research Centre.The Gurney energy was calculated when the expansion velocity was almost constant i.e. at a volume of the explosives gases 7-8 times the original explosive volume. Expansion data for each explosive were fitted to the JWL- equation with help of a Matlab routine and the estimated JWL-parameters were used to calculate the detonation energy.Our conclusions, based on the measured data with Ø100/110 mm tubes are that there is no significant difference in the Gurney energy for the three explosives. The detonation energy increases somewhat with addition of AN/AN-prills, but the difference is small compared to the data scatter. This was basically the same results as for the earlier tests with similar emulsion explosives.The aim of the separate technique study with FOX12/TNT was to verify the contact pin data against streak camera data for two tests. The comparison shows that contact pin radial velocity data for the two shots agree well and that the streak recordings agree fairly well. The comparison of the two techniques shows that streak recordings give a 3-7 % lower radial velocity after approximately 30 μs. The two techniques can be a complement to each other.

  • 8. Olsson, Mats
    et al.
    Bergqvist, Ingvar
    Ouchterlony, Finn
    SveBeFo.
    Stötvågens och gasens inverkan på sprickbildning vid skonsam sprängning2002Report (Other academic)
  • 9. Olsson, Mats
    et al.
    Moser, Peter
    Ouchterlony, Finn
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Grasedieck, A.
    Comparison of the blast fragmentation from lab-scale and full-scale tests at Bråarp2003In: Explosives and blasting technique: proceedings of the EFEE Second World Conference on Explosives and Blasting Technique / [ed] R. Holmberg, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 2003, p. 449-458Conference paper (Refereed)
  • 10.
    Olsson, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Niklasson, Bengt
    Wilson, Lasse
    Andersson, Christer
    Christiansson, Rolf
    Äspö HRL: Experiences of blasting the TASQ tunnel2004Report (Other academic)
  • 11.
    Olsson, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Nyberg, Ulf
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Fjellborg, Stig
    LKAB.
    Kontrollerad sönderbrytning vid skivrassprängning: inledande försök2009Report (Other academic)
    Abstract [en]

    This report describes some tests made in order to examine a number of important factors in sublevel caving. Among these factors were back-break, influence of a neighbour hole, rock movements in caving and the effect of compacted rock.The tests with back-break and influence of neighbour holes were performed in the abandoned open pit at Svappavaara, some 50 km south of Kiruna. The tests area was 100 m long with bench heights of 10-20 m. The area was divided into 4 test areas. Some 40 blast holes were drilled with a hole dimension of 115 mm and with a burden of 3 m. The 1st test area contained a sublevel drill layout of 8 holes but drilled downwards. The purpose here was to study the influence of a neighbour hole and back-break. The 2nd area consisted of a number of parallel vertical holes in two groups with different burdens. In the 3rd area three holes were drilled in a way to test the maximum spacing for breaking rock. The 4th area was again a test of the sublevel caving drill plan. The holes were charged with LKAB's standard emulsion KimuluxR 0500 for sublevel caving work.Measurements of the straightness of the holes were done. The detonation velocity was measured and the four rounds were high-speed filmed. The position of the bench front before and after blasting was measured with a stereo photogrammetric technique. The geology and the deviation of the holes were worse than expected and had an influence on the results. The maximum back-break occurred at tests with sublevel caving. It was possible to increase the burden to 3,5 m but with a coarser fragmentation. Furthermore fully charged 115 mm holes with a spacing of 7 m had no problem to break the burden. The velocity of the blasted front was measured to 13-21 m/s. Tests simulating sublevel caving were performed in the Kiruna mine by blasting a number of 64 mm and 115 mm holes drilled parallel with drift walls at different burdens. The walls were unconfined, i.e. free to move. A new method was invented consisting of an impact rod sliding in a measuring pipe. The impact rod is attached to the wall and when the wall is blasted the rod starts to move in the pipe and cuts a number of equally spaced coaxial cables fixed in the pipe. The velocity of the blasted wall was in this way measured with very good accuracy. The velocity of the wall depends upon the amount of explosive and the burden and varies in these tests from 7 m/s (for a 115 mm hole with a burden of 3,3m) up to 45 m/s (for a 64 mm hole and with a burden of 0,52 m).The drift wall tests series will continue with unconfined shots and shots were the drift wall is confined by caving debris.

  • 12. Olsson, Mats
    et al.
    Ouchterlony, Finn
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Ny skadezonformel för skonsam sprängning2003Report (Other academic)
    Abstract [en]

    Since many years a table is used in Sweden for the judgement of blast damage caused during blasting. Commonly used explosives for such work are listed in order of their equivalent linear charge concentration in terms of kg Dynamex per metre. The table suffers from many shortcomings and is only verified for very few explosives under specific circumstances. A clear definition of damage is lacking. Furthermore it does not take in consideration the influence of blasthole pattern, scatter in initiation and coupling ratio but has been a practical tool to design smooth blasting. So there is a strong demand of a new table. Since a couple of years there has been an intensive research of how cracks are caused by blasting at SveBeFo. A large number of holes have been blasted and the cracks in the remaining rock have been examined. Coupling ratio, spacing, water in the holes, scatter in the initiation and the influence of different explosives on crack lengths are some of the examined factors. With the knowledge of the effects of these factors a new formula has been proposed. The new formula emanates from our measured crack lengths in granite. Compensation factors for decoupling, spacing, initiation, water in holes and the rock are included in the formula. One important factor included in the formula is the variation of the detonation velocity due to decoupling in wet or dry holes. The formula and how it affects planning of smooth blasting has to be tested in different field conditions. Plans for such tests are currently under discussion.

  • 13. Olsson, Mats
    et al.
    Svahn, Victoria
    Ouchterlony, Finn
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Bergqvist, Ingvar
    Fragmentering i bergtäkter2003Report (Other academic)
  • 14. Olsson, Mats
    et al.
    Svärd, Johan
    Orica.
    Ouchterlony, Finn
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Sprängskador från strängemulsion: fältförsök och förslag till skadezonstabell som innehåller samtidig upptändning2008Report (Other (popular science, discussion, etc.))
  • 15.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Nyberg, Ulf
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Olsson, Mats
    Andersson, P-O
    NCC Roads.
    Nyqvist, Linus
    NCC Roads.
    Vikström, Kristina
    NCC Roads.
    Bida, Jan
    Bergskolan.
    Svedensten, Per
    Sandvik Minng and Construction.
    Fragmenteringsförsök vid NCC:s täkt i långåsen, effekten av höjd specifikladdning eller elektronik upptändning2010In: Protokoll från Bergsprängningskommitténs diskussionsmöte i Älvsjö den 9 mars 2010, 2010, p. 118-154Conference paper (Other academic)
  • 16.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Nyberg, Ulf
    Olsson, Mats
    Bergquist, Ingvar
    Granlund, Lars
    Grind, Henrik
    The energy balance of production blasts at Nordkalk's Klinthagen quarry2003In: Explosives and blasting technique: proceedings of the EFEE Second World Conference on Explosives and Blasting Technique / [ed] R. Holmberg, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 2003, p. 193-203Conference paper (Refereed)
  • 17.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Nyberg, Ulf
    Olsson, Mats
    Bergquist, Ingvar
    Granlund, Lars
    Grind, Henrik
    Vart tar sprängämnesenergin i sprängsalvor vägen?2004In: Bergsprängningskommittén Diskussionsmöte BK 2004, Bergsprängningskommittén , 2004, p. 85-103Conference paper (Other academic)
    Abstract [sv]

    Vid bergsprängning frigörs snabbt stora mängder kemiskt bunden energi, 3-4 MJ per kg sprängämne. En del stannar som förluster i hålet och en del överförs till berget. Av den överförda energin nyttiggörs bara en del. Mätningar på fem produk¬tionssalvor hos Nordkalk Storugns visar hur energin kan fördelas. För att uppskatta förlusterna i hålet har ett nytt prov utvecklats, cylinderexpansions¬provet. I det sprängs laddade kopparrör och rörväggens hastighet mäts. Proven visar att ANFO förmår överföra 40-50 % av sin energi till radiellt expansionsarbete medan bulkemulsionen hos Nordkalk, Titan 6080 överför 60-70 %.Mätningarna hos Nordkalk visar att sprickytan ökar från 3-6 m2/m3 in-situ till 20-23 m2/m3 i salvhögen, motsvarande en fragmenteringsenergi på endast 0,1-0,2 % av sprängämnesenergin. Kasthastigheter om ca 10 m/s ger en kinetisk energi hos det lossbrutna berget på 3-12 %. Svängningshastighetsmätningarna ger lika lite seismisk energi. Tillsammans uppgår de tre energidelarna alltså till högst 25 % jämfört med i cylinderexpansionsprovet uppmätta 60-70 %. Krossningsarbete närmast borrhålet utgör förmodligen en stor del av mellanskillnaden

  • 18.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Nyberg, Ulf
    Olsson, Mats
    Bergqvist, Ingvar
    Dyno Nobel Europe AB.
    Granlund, Lars
    Dyno Nobel Europe AB.
    Grind, Henrik
    Nordkalk AB.
    Where does the explosive energy in rock blasting rounds go?2004In: Science and Technology of Energetic Materials, ISSN 1347-9466, Vol. 65, no 2, p. 54-63Article in journal (Refereed)
    Abstract [en]

    The energy partitioning of limestone production blasts has been measured under well controlled conditions; from rock properties determination, structural mapping and monitoring of drilling and charging, to VOD, 3D accelerometer and bench face movement measurements during the blast to post-blast fragment size measurements. The efficiency of the transfer of energy from the charges to the surrounding rock has been estimated by introducing a new explosives test, the cylinder expansion test, which is discussed to be-gin with. Hereby in-hole losses, seismic energy, kinetic energy of throw and fragmentation energy have been calculated. For the AN doped gassed bulk emulsion used in the quarry, it is estimated that 60-70 % of the explosive energy is transmitted to the rock, that the seismic and kinetic energy terms both amount to roughly 3-12 % and the fragmentation energy to less than 1-2 %. One candidate for the remaining losses, which are larger than the other three terms together, is the crushing of the blast-hole region. A rough estimate for the energy partitioning in bench blasting rounds is finally given.

  • 19.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Kou, S.
    Evertsson, M.
    Yanmin, Wang
    Forssberg, Eric
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    A survey of rock fragmentation research in Sweden and the world2004Report (Other academic)
  • 20.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Nyberg, Ulf
    Andersson, Peter
    Gustavsson, Lennart
    Constructing the fragment size distribution of a bench blasting round, using the new Swebrec function2006In: Proceedings of the 8th International Conference on Rock Fragmentation by Blasting, Santiago: Editec , 2006, p. 332-344Conference paper (Refereed)
    Abstract [en]

    The blasting at the Vändle aggregate quarry has been investigated in order to predict the effect of the specific charge on fragmentation and to assess the contribution of blasting and primary crushing to the -32 mm fines. Two 25000 ton blasts divided into halves were monitored. Each half had an expanded or a shrunken pattern in order to lower or raise the specific charge. A normal round uses Ø90 mm drill-holes on a 34 m pattern with a gassed bulk emulsion blend with 20-25 % of AN prills. The test rounds lay directly behind each other, with a shrunken pattern behind an expanded one and vice versa to minimize the influence of geology.From the muck piles, four test piles of about 500 tons were extracted and photographed for image processing. About a quarter of each was sieved in four steps and fines samples taken. The material was replaced and the whole pile fed to the primary crusher while measuring the effect and the fines produced. Crushability and grindability data were measured.All lab samples and crushing test samples follow the new Swebrec distribution extremely well. The fragmentation size distribution of the muck piles is constructed using the sieving data and the lab samples, conforming to the Swebrec function. Image analysis gives a fragmentation curve with a distinctly different character. Of the total of 28 % of -32 mm fines after primary crushing, blasting and crushing contribute about half each. Based on these data a set of design curves are constructed that allow the prediction of how any given fraction changes when the specific charge in the round is changed.

  • 21.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Nyberg, Ulf
    Potts, Greg
    Luleå tekniska universitet.
    Andersson, Peter
    Swerock AB, Västerås.
    Gustavsson, Lennart
    Swerock AB.
    Fragmenteringsförsöken i Vändle och designkurvor för ändring av specifik laddning2006In: Bergsprängningskommittén Diskussionsmöte BK 2006, Bergsprängningskommittén , 2006, p. 97-122Conference paper (Other academic)
    Abstract [sv]

    Sprängförsök har utförts vid Swerock AB:s Vändletäkt för att ta fram en beskrivning av hur sprängningsresultatet kan påverkas så att önskat styckefall in i förkrossen erhålls. Resultatet blev bl a designkurvor som beskriver hur styckefallsfördelningen ändras när den specifika laddningen ändras. I två produktionssalvor krymptes hålmönstret i ena halvan och glesades ut i den andra med användning av befintlig borrutrustning. Uppföljningen bestod av profil- och hålinmätning, mätning av laddad mängd och VOD samt styckefallsmätningar mm. Ur salvorna togs fyra provhögar och ca 100 ton ur varje siktades och utvärderades med bildanalys. Materialet lades sedan tillbaka och provhögarna krossades medan krossningsenergin mättes. Ur siktdata kunde styckefalls-fördelningarna konstrueras med hjälp av Swebrecfunktionen. Några slutsatser är att - Styckefallet liknar bergmaterialkurva nr 62 - Sprängningen och förkrossen bidrar med lika mycket var av producerad bärlagerfraktion - Skutandelen kan uppskattas med bildanalysen men styckefallskurvorna från bildanalysen har annan form än siktkurvorna - Siktkurvorna bedöms vara tillförlitligare

  • 22.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Nyberg, Ulf
    Potts, Greg
    Luleå tekniska universitet.
    Andersson, Peter
    Swerock AB, Västerås.
    Gustavsson, Lennart
    Swerock AB, Västerås.
    Optimal fragmentering i krosstäkter: fältförsök i Vändletäkten2003Report (Other academic)
  • 23.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Svärd, Johan
    Orica Mining Services.
    Blast damage from string emulsion and electronic detonators2009In: Budapest Conference Proceedings 2009 / [ed] Peter Moser, European Federation of Explosives Engineers , 2009, p. 315-334Conference paper (Refereed)
  • 24.
    Ouchterlony, Finn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olsson, Mats
    Svärd, Johan
    Orica Mining Services.
    Crack lengths or blast damage from string emulsion and electronic detonators2009In: Rock Fragmentation by Blasting: Proceedings of the 9th Int. Symp. on Rock Fragmentation by Blasting - Fragblast 9, Sept. 2009, Granada Spain / [ed] José A. Sanchidrián Blanco, Boca Raton, Fla: CRC Press, 2009, p. 469-480Conference paper (Refereed)
    Abstract [en]

    The crack patterns from contour blasting in Ø48-mm holes with Orica/Dyno Nobel SSE 0.35, 0.5 or 0.9 kg/m string emulsion charges in the Bårarp gneiss quarry have been studied, using both Nonel and electronic detonators. Some 24 blocks from behind half-casts were sawn and the cracks mapped. The crack lengths caused by simultaneously initiated SSE 0.35 kg/m or packaged Ø17 mm Dynotex 1 were practically the same. SSE 0.5 kg/m gave a roughly 50% increase in length. Nonel initiation resulted in longer cracks, as did water-filled holes. Nonel also gave a rougher remaining rock surface and frequently undetonated charges were found on the muck-pile. Earlier damage zone data were used to develop a suggested addendum to the present Swedish damage zone table. The use of simultaneously initiated decoupled light contour charges (q < 0.6 kg DxM/m) in dry holes has a damage suppressing effect compared to normal pyrotechnic initiation

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