A guide to leading practice sustainable development in mining

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As construction proceeds, it is important that an accurate record of all works is kept in order to: ensure the tailings storage facility was constructed by a competent contractor, with an appropriate level of supervision and quality control of construction materials and techniques to show they were in accordance with the design drawings and specifications. provide a detailed record and description of geo-technically critical aspects such as the preparation of foundations, treatment of cracks in key and cut-off trenches, or the compaction of backfill around outlet works. This record is assists in the design and construction of remedial works if any post-construction issues occur. provide as-constructed drawings that: – provide an accurate representation of the detailed construction works, particularly where design changes may have occurred during construction; – assist in improved designs for further stages; – provide details and dimensions for remedial works so that these do not impact the integrity of existing structures; and – provide details for back-analyses should these be required. Water Management Introduction Mine management needs to take into account the following water considerations in resource development and design Water supply – identification and quantification. Impacts of water abstraction/diversion on local water resources/users. Government approvals. Water supply, storage and treatment (design and construction). Dust suppression and dewatering discharge. Waste water disposal. Site stormwater management. It is essential that extensive investigations are carried out during the development stage to ensure water management is integrated into the overall management system of the mining operation. Clearly the mine will need sufficient water for the mining operation including dust suppression, equipment needs, washing, potable, sanitation etc. More significantly, given the considerable demand for water is in the processing stage. A rule of thumb for gold mining suggests that one tonne of ore processed requires one tonne of water. If a mine processes 2 million tonnes a year, which is not a large mill, then the water make required is very substantial. The Cadia Valley operations provide an example of managing the scarce water resource and balancing the mine’s demands with competing demands from other users. A GUIDE TO LEADING PRACTICE SUSTAINABLE DEVELOPMENT IN MINING 83
Watercourse diversions In order to access the mineral resource in surface mining operations, it is occasionally necessary in the development stage to divert a creek or river around the workings. Leading practice design of watercourse diversions will reduce time and cost associated with the approvals process. The main activities that must be undertaken to plan for and implement a diversion at various stages during the life cycle of an operation are shown in Figure 3.5. Ensure planning and management between site water users and those responsible for discharge management Access experts in complex ecological and geomorphological assessments Post-mining & closure Ensure final form of diversion meets changed run-off circumstances with final landform and ecosystems Resource development & design Establish reference conditions Monitor baseline & ongoing condition Mining, minerals processing & refining Monitor and maintain diversion performance & stability Figure 3.5 - Significant issues in designing and managing watercourse diversion across the life of an operation Characterise relationship between watercourse and ore body Exploration Resource development & design Establish diversion functional and aesthetic requirements Construct diversion Characterise relationship between watercourse and mine plan TRUenergy Yallourn supplies 22 per cent of Victoria’s electricity requirements. Its current coal supplies were expected to be exhausted in 2009, and nearby Maryvale Coalfield presented the best potential future coal supply. However, the Morwell River was located between the mine and this coal reserve. A river diversion was proposed that would lead to economic and environmental outcomes. A design team comprising mine planners, geotechnical experts, ecologists, embankment designers and hydraulic engineers was formed. It was agreed the diversion embankment could be constructed in engineered fill from 13 million cubic metres of overburden that needed to be stripped from the mine, significantly reducing the cost of the project. The design required the creation of a 70 metre wide and a 3.5 kilometre long diversion channel on top of an embankment that commenced at the Morwell River upstream, and connected with the Latrobe River downstream. The channel design accommodated a 1 in 10 000 year probability flood and was designed to mimic the geomorphic and ecological characteristics of the natural Morwell River (see LP Water p.71). 84 LEADING PRACTICE SUSTAINABLE DEVELOPMENT PROGRAM FOR THE MINING INDUSTRY Communicate plan and any trade-offs, compared to reference conditions, to community and regulator
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LEADING PRACTICE SUSTAINABLE DEVELO
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Disclaimer This publication has bee
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3.0 DEVELOPMENT AND CONSTRUCTION 61
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ACKNOWLEDGEMENTS The Leading Practi
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viii LEADING PRACTICE SUSTAINABLE D
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1.0 INTRODUCTION The Purpose and La
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Airborne Contaminants, Noise and Vi
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Water Management (LP Water) This ha
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Site water team Corporate managemen
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Sustainable Mining There is no one
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Mining the resource efficiently. Th
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Efficiency SUSTAINABLE MINING PRACT
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LOCATION: Vilabouly District, Savan
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Leading Practice The handbooks in t
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2.0 PRE-DEVELOPMENT: MINERAL EXPLOR
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The application of high standard en
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The Business Case for Sustainabilit
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The information obtained from these
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conditions are appropriate. In NSW,
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Such richness also brings challenge
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The dunefields of Shelburne Bay had
Page 44 and 45: Community Engagement in the Early S
Page 46 and 47: Baseline studies and social impact
Page 48 and 49: Upon completion of the study, resea
Page 50 and 51: The scenarios envisaged for the Wat
Page 52 and 53: 2. Reflections on the significance
Page 54 and 55: Engaging with Indigenous communitie
Page 56 and 57: Figure 2.9 - A New Township under C
Page 58 and 59: Geochemical assessment aims to iden
Page 60 and 61: Regardless of the project phase (ex
Page 62 and 63: Evaluating Performance: Monitoring
Page 64 and 65: For these reasons, it is important
Page 66 and 67: Risk Management and Exploration Exp
Page 68 and 69: Post-mining & closure Resource deve
Page 70: level of family diversity was maint
Page 73 and 74: Introduction The development and co
Page 75 and 76: MINE: Mt Todd LOCATION: Near Kather
Page 77 and 78: Airborne Contaminants, Noise and Vi
Page 79 and 80: Biodiversity Management During Deve
Page 81 and 82: Rather than taking a generic approa
Page 83 and 84: Step 2: Working in collaboration On
Page 85 and 86: course was designed to train and pr
Page 87 and 88: Adjustments for changes in the mine
Page 89 and 90: indicators of high importance durin
Page 91 and 92: Operating major mining projects pre
Page 93: the earliest stage of development,
Page 97 and 98: Figure 3.7 - Morwell River after di
Page 99 and 100: tailings disposal techniques contin
Page 101 and 102: Figure 4.2 - Predicted blast overpr
Page 103 and 104: Responsible management of biodivers
Page 105 and 106: Leading practice management of wate
Page 107 and 108: MINE: Pierina Mine LOCATION: Distri
Page 109 and 110: Weipa - a sustainable approach to t
Page 111 and 112: Adopting the International Cyanide
Page 113 and 114: Box 1: Major recent incidents invol
Page 115 and 116: MINE: Chatree gold mine LOCATION: P
Page 117 and 118: The audit outcomes also highlight t
Page 119 and 120: Mercury for gold recovery in small/
Page 121 and 122: Figure 4.9 - Geological control to
Page 123 and 124: highest rating group for the whole
Page 125 and 126: Figure 4.13 - Beverley uranium mine
Page 127 and 128: from 2.5 - 3.0 tonnes/man-shift to
Page 129 and 130: Figure 4.17 - Sunrise Dam TSF Taili
Page 131 and 132: Dry stacking bauxite residue is now
Page 133 and 134: Once the water is used underground
Page 135 and 136: The Rio Tinto “Excellence in Wate
Page 137 and 138: Background Image: Sourced from GOOG
Page 139 and 140: Company policies and government reg
Page 142 and 143: 5.0 MINE REHABILITATION AND CLOSURE
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Closure involves the implementation
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Biodiversity and Closure Introducti
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e better than the high standard bei
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Figure 5.7 - Pasture and shelter tr
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The Argyle Diamonds case study (see
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support and on site accommodation a
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Having the right information to mak
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Figure 5.13 - Misima after rehabili
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In January 2011, the PNG government
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MINE: Former lignite mines LOCATION
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Fig 5.16: Former Minister Stein Coa
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Figure 5.19 - Rehabilitated mine si
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Figure 5.21 - Pit water treatment p
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Final Rehabilitation Rehabilitation
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Figure 5.23: Aerial view of Area 4
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Landform construction In general, e
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The Hsin-Chen Shan quarry terrain i
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Figure 5.29 - Spreading topsoil at
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Risk Management Risk at closure and
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During the 1980s and 1990s, a numbe
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An example of direct vegetation is
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Water Management Central to a mine
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Department of Resources, Energy and
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GLOSSARY AND ACRONYMS Abandoned min
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Biodiversity offsets Conservation a
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Cultural heritage Cultural heritage
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Engagement At its simplest, engagem
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High rate thickener A thickener thr
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NAPP Net Acid Producing Potential,
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Product stewardship This is perhaps
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Risk management process The risk ma
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Sustainable development Sustainable
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A guide to leading practice sustainable development in mining

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