ISO/DIS 21795-2
(Main)Mine closure and reclamation planning
Mine closure and reclamation planning
Planification de la fermeture et de la restauration des mines
General Information
Standards Content (sample)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21795-2
ISO/TC 82/SC 7 Secretariat: KATS
Voting begins on: Voting terminates on:
2020-08-10 2020-11-02
Mine closure and reclamation planning —
Part 2:
Guidance
Planification de la fermeture et de la restauration des mines —
Partie 2: Lignes directrices
ICS: 73.020
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 21795-2:2020(E)
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ISO/DIS 21795-2:2020(E)
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ISO/DIS 21795-2:2020(E)
Contents Page
Foreword ......................................................................................................................................................................................................................................vii
Introduction ............................................................................................................................................................................................................................viii
1 Scope ................................................................................................................................................................................................................................. 1
2 Normative references ...................................................................................................................................................................................... 2
3 Terms and definitions ..................................................................................................................................................................................... 2
4 Closure and reclamation of mine site ............................................................................................................................................. 2
4.1 Tailings storage facilities ................................................................................................................................................................ 2
4.1.1 General...................................................................................................................................................................................... 2
4.1.2 Objectives ............................................................................................................................................................................... 3
4.1.3 Approach ................................................................................................................................................................................ 3
4.1.4 Status assessment ........................................................................................................................................................... 3
4.1.5 Risk assessment ...................................................................... .......................................................................................... 4
4.1.6 Alternatives analyses ................................................................................................................................................... 5
4.1.7 Plan .............................................................................................................................................................................................. 5
4.2 Water storage facilities .................................................................................................................................................................... 6
4.2.1 General...................................................................................................................................................................................... 6
4.2.2 Objectives ............................................................................................................................................................................... 6
4.2.3 Approach ................................................................................................................................................................................ 7
4.2.4 Status assessment ........................................................................................................................................................... 7
4.2.5 Risk assessment ...................................................................... .......................................................................................... 7
4.2.6 Alternatives analyses ................................................................................................................................................... 8
4.2.7 Plan .............................................................................................................................................................................................. 8
4.3 Waste rock dumps ................................................................................................................................................................................ 9
4.3.1 General...................................................................................................................................................................................... 9
4.3.2 Objectives ............................................................................................................................................................................... 9
4.3.3 Approach ................................................................................................................................................................................ 9
4.3.4 Status assessment ........................................................................................................................................................10
4.3.5 Risk assessment ...................................................................... .......................................................................................11
4.3.6 Alternatives analyses ................................................................................................................................................11
4.3.7 Plan ...........................................................................................................................................................................................11
4.4 Heap leach facilities .........................................................................................................................................................................12
4.4.1 General...................................................................................................................................................................................12
4.4.2 Objectives ............................................................................................................................................................................12
4.4.3 Approach .............................................................................................................................................................................13
4.4.4 Status assessment ........................................................................................................................................................13
4.4.5 Risk assessment ...................................................................... .......................................................................................14
4.4.6 Alternatives analyses ................................................................................................................................................14
4.4.7 Plan ...........................................................................................................................................................................................15
4.5 Open pits ...................................................................................................................................................................................................15
4.5.1 General...................................................................................................................................................................................15
4.5.2 Objectives ............................................................................................................................................................................16
4.5.3 Approach .............................................................................................................................................................................16
4.5.4 Status assessment ........................................................................................................................................................16
4.5.5 Risk assessment ...................................................................... .......................................................................................17
4.5.6 Alternatives Analyses ................................................................................................................................................17
4.5.7 Plan ...........................................................................................................................................................................................18
4.6 Underground workings ................................................................................................................................................................19
4.6.1 General...................................................................................................................................................................................19
4.6.2 Objectives ............................................................................................................................................................................19
4.6.3 Approach .............................................................................................................................................................................19
4.6.4 Status assessment ........................................................................................................................................................20
4.6.5 Risk assessment ...................................................................... .......................................................................................20
4.6.6 Alternatives analyses ................................................................................................................................................20
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ISO/DIS 21795-2:2020(E)
4.6.7 Plan ...........................................................................................................................................................................................21
4.7 Mine infrastructure ..........................................................................................................................................................................23
4.7.1 General...................................................................................................................................................................................23
4.7.2 Objectives ............................................................................................................................................................................23
4.7.3 Approach .............................................................................................................................................................................24
4.7.4 Status assessment ........................................................................................................................................................24
4.7.5 Risk and opportunity assessment ..................................................................................................................24
4.7.6 Alternatives analyses ................................................................................................................................................25
4.7.7 Plan ...........................................................................................................................................................................................26
4.8 Temporary closure ............................................................................................................................................................................26
4.8.1 General...................................................................................................................................................................................26
4.8.2 Objectives ............................................................................................................................................................................27
4.8.3 Status assessment ........................................................................................................................................................27
4.8.4 Risk and opportunity assessment ..................................................................................................................27
4.8.5 Alternatives analyses ................................................................................................................................................27
4.8.6 Plan ...........................................................................................................................................................................................27
5 Land reclamation and water management ............................................................................................................................28
5.1 Landforms ................................................................................................................................................................................................28
5.1.1 General...................................................................................................................................................................................28
5.1.2 Objectives ............................................................................................................................................................................28
5.1.3 Approach .............................................................................................................................................................................28
5.1.4 Plan ...........................................................................................................................................................................................29
5.2 Surface preparation .........................................................................................................................................................................29
5.2.1 General...................................................................................................................................................................................29
5.2.2 Objectives ............................................................................................................................................................................30
5.2.3 Approach .............................................................................................................................................................................30
5.3 Vegetation establishment ...........................................................................................................................................................31
5.3.1 General...................................................................................................................................................................................31
5.3.2 Objectives ............................................................................................................................................................................31
5.3.3 Approach .............................................................................................................................................................................31
5.3.4 Evaluating site conditions for revegetation: .........................................................................................32
5.3.5 Selection of revegetation approaches .........................................................................................................32
5.3.6 Revegetation Plan ........................................................................................................................................................33
5.3.7 Monitoring and adaptive management .....................................................................................................34
5.4 Water management ..........................................................................................................................................................................34
5.4.1 General...................................................................................................................................................................................34
5.4.2 Objectives ............................................................................................................................................................................34
5.4.3 Approach .............................................................................................................................................................................35
5.4.4 Water Management Plan ........................................................................................................................................36
5.5 Water treatment .................................................................................................................................................................................37
5.5.1 General...................................................................................................................................................................................37
5.5.2 Objectives ............................................................................................................................................................................37
5.5.3 Approach .............................................................................................................................................................................37
5.5.4 Design .....................................................................................................................................................................................38
5.5.5 Operations and maintenance .............................................................................................................................39
5.6 Covers ..........................................................................................................................................................................................................39
5.6.1 General...................................................................................................................................................................................39
5.6.2 Objectives ............................................................................................................................................................................40
5.6.3 Cover design .....................................................................................................................................................................40
5.6.4 Modelling and field testing ...................................................................................................................................41
5.6.5 Monitoring and maintenance aspects specific to covers ............................................................42
5.6.6 Consideration of climate zones ........................................................................................................................42
5.6.7 Objectives ............................................................................................................................................................................42
5.6.8 Wet and tropical climates ......................................................................................................................................42
5.6.9 Arid climates.....................................................................................................................................................................42
5.6.10 Cold climates ....................................................................................................................................................................43
5.6.11 Temperate climates ....................................................................................................................................................43
5.7 Climate change effects ...................................................................................................................................................................44
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5.7.1 General...................................................................................................................................................................................44
6 Stakeholder engagement ..........................................................................................................................................................................44
6.1 General ........................................................................................................................................................................................................44
6.2 Objectives..................................................................................................................................................................................................45
6.3 Approach ...................................................................................................................................................................................................45
6.3.1 General...................................................................................................................................................................................45
6.3.2 Stakeholders identification ..................................................................................................................................46
6.3.3 Special rights holders ...............................................................................................................................................47
6.3.4 Indigenous Peoples .....................................................................................................................................................47
6.3.5 Stakeholder mapping ................................................................................................................................................47
6.3.6 Engagement methods ...............................................................................................................................................47
6.3.7 Response program.......................................................................................................................................................47
6.3.8 Post-closure and reclamation stakeholder agreements .............................................................48
6.3.9 Engagement plan ..........................................................................................................................................................48
6.3.10 Engagement and reporting frequency .......................................................................................................48
7 Decision and analysis tools .....................................................................................................................................................................48
7.1 Design levels ...........................................................................................................................................................................................48
7.1.1 General...................................................................................................................................................................................48
7.1.2 Objectives ............................................................................................................................................................................48
7.1.3 Approach .............................................................................................................................................................................49
7.1.4 Conceptual design level ..........................................................................................................................................49
7.1.5 Pre-feasibility design level ...................................................................................................................................49
7.1.6 Feasibility design level .............................................................................................................................................50
7.1.7 Detailed design level ..................................................................................................................................................50
7.1.8 As-built documentation ..........................................................................................................................................50
7.1.9 Application of design levels to mine closure and reclamation planning ......................50
7.2 Alternatives identification and analysis .........................................................................................................................51
7.2.1 General...................................................................................................................................................................................51
7.2.2 Objectives ............................................................................................................................................................................51
7.2.3 Approach .............................................................................................................................................................................51
7.2.4 Technology screening ...............................................................................................................................................52
7.2.5 Options screening ........................................................................................................................................................53
7.2.6 Options Analysis ............................................................................................................................................................54
7.2.7 Stakeholder engagement .......................................................................................................................................55
7.2.8 Documentation ...............................................................................................................................................................55
7.3 Designing and operating for closure and reclamation ......................................................................................55
7.3.1 General...................................................................................................................................................................................55
7.3.2 Objectives ..................................................................................................................................................................
...
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