A guide to leading practice sustainable development in mining

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Figure 4.21 – Iluka staff engaging with the local Wimmera community Integration of water supplies Leading practice dictates that supply of water to even a single component/process within the operation must be considered in a holistic way. The site operational simulation model with linked water quality requirements and constraints is the best tool for analysing options. The need for additional draw on new water resources outside of the existing water circuit needs to be fully justified. This includes a cost analysis and consideration of life-of-mine requirements. Integration provides significant synergy and opportunities, while short–term single-user solutions may become long-term liabilities. In some cases, it is possible to reduce overall water consumption by integrating sources from nearby mines. Redirection of groundwater from mine operational dewatering at one mine rather than continuing to extract from a separate borefield at another is an active development in a number of Pilbara iron ore mines, for example, Paraburdoo and Mt Whaleback. BHP Billiton Iron Ore manages two satellite ore bodies, Orebody 23 and Orebody 25 situated approximately 12 kilometres and eight kilometres to the east of Newman and the company’s Mt Whaleback operation. Mining of both ore bodies requires lowering of the water tables through the use of dewatering bores. The Mt Whaleback mine west of Newman has a large process water demand. Rather than develop local groundwater sources which would potentially be lower cost, the dewatering water from Orebody 23 and Orebody 25 Pit 3 is pumped about 13 kilometres and against a static head of 90 metres to a storage tank which then provides a gravity supply of process water. By utilising the dewatering water across this interconnected system between Orebody 23, Orebody 25 and Mt Whaleback, the overall groundwater abstraction is minimised, reducing the impact from mining operations (see LP Water p.51). A GUIDE TO LEADING PRACTICE SUSTAINABLE DEVELOPMENT IN MINING 125
Background Image: Sourced from GOOGLE EARTH Mt WHALEBACK MINE F:\Jobs\740\Newman WS\Eng\Water Recycling Scheme.doc Figure 4.22 – Mt Whaleback water supply system LEGEND PIT DEWATERING BORES STORAGE TANK TRANSFER PIPELINE ( ‘E-LINE” ) OB 25 TRANSFER PUMP STATION Integration of the operational water supply system within the regional supply system provides benefits. In Weipa, selective use of different water sources has improved water security, reduced costs through increased reuse and benefited the reputation of the operation (see LP Water p.52). Bauxite mining operations at Rio Tinto Aluminium Weipa occur in a region of water excess, due to the tropical and monsoonal climate. The mine has multiple sources of water to draw from, each of which has its associated costs and additional values. The four main sources are decant water from the tailings dam; site rainfall runoff captured in ‘slots’ and other small storages across the mining lease; shallow aquifers underlying the area; and the deeper aquifers of the Great Artesian Basin. Availability of the different sources can vary during the year, particularly the first two sources. In other situations, such integration offers increased efficiency and opportunities in terms of water trading, particularly with respect to waters of differing quality. For example, the cost of plant modifications to use poor quality water may be off-set by gains in trading good quality water entitlements to other users. Similarly, water sharing arrangements between adjacent mines may reduce the burden on one to dispose of excess water, allow the second to access the worked water and thereby potentially free up fresh water for other uses in the catchment. This type of approach is increasing in application in the Hunter Valley in NSW, for example. Created with novaPDF Printer (www.novaPDF.com) HOMESTEAD CREEK XD 57 STORAGE TANK NEWMAN TOWN OREBODY 25 pit 3 WHALEBACK CREEK Orebody 25 Transfer Pump Station 126 LEADING PRACTICE SUSTAINABLE DEVELOPMENT PROGRAM FOR THE MINING INDUSTRY Orebody 23 OPTHALMIA DAM OB23 / OB25 Pit 3 Water Recycling Scheme Figure 1
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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
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Community Engagement in the Early S
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Baseline studies and social impact
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Upon completion of the study, resea
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The scenarios envisaged for the Wat
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2. Reflections on the significance
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Engaging with Indigenous communitie
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Figure 2.9 - A New Township under C
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Geochemical assessment aims to iden
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Regardless of the project phase (ex
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Evaluating Performance: Monitoring
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For these reasons, it is important
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Risk Management and Exploration Exp
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Post-mining & closure Resource deve
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level of family diversity was maint
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Introduction The development and co
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MINE: Mt Todd LOCATION: Near Kather
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Airborne Contaminants, Noise and Vi
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Biodiversity Management During Deve
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Rather than taking a generic approa
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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 and 94: the earliest stage of development,
Page 95 and 96: Watercourse diversions In order to
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: The Rio Tinto “Excellence in Wate
Page 139 and 140: Company policies and government reg
Page 142 and 143: 5.0 MINE REHABILITATION AND CLOSURE
Page 144 and 145: Closure involves the implementation
Page 146 and 147: Biodiversity and Closure Introducti
Page 148 and 149: e better than the high standard bei
Page 150 and 151: Figure 5.7 - Pasture and shelter tr
Page 152 and 153: The Argyle Diamonds case study (see
Page 154 and 155: support and on site accommodation a
Page 156 and 157: Having the right information to mak
Page 158 and 159: Figure 5.13 - Misima after rehabili
Page 160 and 161: In January 2011, the PNG government
Page 162 and 163: MINE: Former lignite mines LOCATION
Page 164 and 165: Fig 5.16: Former Minister Stein Coa
Page 166 and 167: Figure 5.19 - Rehabilitated mine si
Page 168 and 169: Figure 5.21 - Pit water treatment p
Page 170 and 171: Final Rehabilitation Rehabilitation
Page 172 and 173: Figure 5.23: Aerial view of Area 4
Page 174 and 175: Landform construction In general, e
Page 176 and 177: The Hsin-Chen Shan quarry terrain i
Page 178 and 179: Figure 5.29 - Spreading topsoil at
Page 180 and 181: Risk Management Risk at closure and
Page 182 and 183: During the 1980s and 1990s, a numbe
Page 184 and 185: 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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