sara töyrä, arbetsgrupp dammsäkerhetswedcold.org/d68a temadagar/2019-2/11.pdfconnection between...
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Sara Töyrä, Arbetsgrupp Dammsäkerhet
Hur ser det ut med våra svenska gruvdammar?
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AGDA – ArbetsGrupp DAmmsäkerhet
Lena Printzell, Björkdalsgruvan
Sara Töyrä, LKAB,
ordförande
Hans Häggström,
Boliden ABAstrid Lindgren, Boliden AB
Peter Marthin, LKAB
Lars-Åke Lindahl,
SveMin
Staffan Fahlgren,
Zinkgruvan AB
Sophie Danilov,
LKAB
Kenneth Jokinen,
LKAB
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Svensk gruvhistoria
1150:
Första
järnmalmsgruvan
1888:
Malmbanan
färdigställs
1910:
5 miljoner ton,
240 gruvor
2017:
78 miljoner ton,
13 gruvor
1500 talet:
Europas största
koppargruva
1890:
LKAB grundas
1960:
25 miljoner ton,
100 gruvor
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Svensk gruvhistoria - malmproduktion
[Mto
n]
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Anta
l gru
vor
i drift
Svensk gruvhistoria – antal gruvor
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13 Aktiva gruvor
Järn
Bas metaller (Sulfidmalm)
Guld
Gruvnäringen i Sverige
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1960-1970
Vattenkraftens storhetstid
Flertalet gruvdammar anläggs
1995
11 Sandmagasin i drift.
Ändutsläpp från naturlig mark.
2000
Introduktion av dränerade
fyllnadsdammar
Utveckling av svenska gruvdammar
2020
Utökat fokus pådammsäkerhet
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Årsstatistik av incidenter kopplad till gruvdammar
0
1
2
3
4
5
6
7
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Anta
l
Årtal
Mount Polley
Bento Rodrigues
(Samarco)
Brumadinho,
3 Brasilianska haverier
Aitik
Källa: http://www.wise-uranium.org/mdaf.html
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Bidragande faktorer till omställning
• Ökad höjningstakt
• Begränsningar i markutbredning
• Volym/kostnad
• Begränsningar av att använda naturmaterial
Dränerade inåtdammar
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Utmaning:
Stabilitet
Lösning:
Stödbankar av sidoberg
Dränerade inåtdammar
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2001 2010 2014 2018
Vattenhantering/deponeringskapacitet
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• Spigottering 5 sites
• Cyklonering 1 site
• Högförtjockare 2 sites
• Undervattensdeponering 1 site
I Sverige har sex av nio gruvdammar
anrikningssand i den strukturella zonen.
Deponering vid svenska gruvdammar idag
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14
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© ICMMwww.ICMM.com | MiningWithPrinciples.com | Follow us on
Independent review process
Outcome is development of international standard
15
Chair and
Expert Panel
UN Environment
Multi-stakeholder Advisory Group
Tailings advisory group
Investor advisory group
▪ Classification system
and requirements for
each level
▪ Credible independent
review
▪ Emergency planning
and preparedness
▪ Accountability
International standard
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© ICMMwww.ICMM.com | MiningWithPrinciples.com | Follow us on
Connection between various ‘documents’
How various pieces of work connect together
16
International standard
Specific commitments
Supporting Guidance
TechnicalGuidelines
▪ ICMM position statement on tailings governance
▪ Future requirements of international standard
▪ ICMM guidance aligned with Prof. Morgenstern and existing global best practice governance (i.e. MAC)
▪ ICOLD, ANCOLD, CDA, JCOLD, SANCOLD, etc.
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• “Good practice”
internationell utblick
• Deponeringsutredning
• Anpassning mot
Global Tailings Review
• Samverkar i branschen
GruvRIDAS 2020
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Save the date!
• Workshop in Static Liquefaction
• Professor Andy Fourie,
The University of Western Australia
• 1 – 2 June 2020 in Stockholm
• In cooperation with SveMin, Svenska
kraftnät och ACG (Australian Center for
Geomechanics)