A guide to leading practice sustainable development in mining

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For in-pit tailings deposition, tailings slurry is pumped and discharged into one of a number of mined out pit voids. Process water is recovered from pits and reused through the process circuit. The tailings slurry is pumped at 60 percent solids and contains 130 milligrams per litre WAD cyanide at the process plant. Without adequate controls, the WAD cyanide levels may pose risks to wildlife and groundwater quality. The Tanami region sits within the east Asian-Australasian flyway for migratory shorebirds. Daily bird checks conducted on the Granites lease since early 2005 have detected 12 of the 43 species listed in the 1993 National Plan for Shorebird Conservation in Australia. A further three species are likely to be found in the area during migration but have not been sighted on the lease. The Newmont Standard for Tailings Management states that tailings activities will not impact on groundwater. There are potential environmental impacts associated with in pit tailings deposition in the Tanami including fauna mortalities associated with cyanosis and groundwater contamination. The water surrounding Bunkers Hill pit has been found to range from brackish to saline. The deposition of tailings into Bunkers Hill pit will probably result in a saline plume infiltrating the surrounding bedrock and being detectable for up to 250 metres from the pit. Tailing into Bunkers pit commenced in June 2007 and to date, groundwater contamination has only been detected in one seepage interception bore. As yet there is no evidence of connectivity between the surrounding groundwater and the pit in the other seepage interception or monitoring bores. This may change as the tailings rises in the pit, therefore, the bores are routinely monitored (see LP Cyanide p.60). It is believed that the potential impacts can be managed by implementing cyanide destruction technology, installing a seepage interception system, and with diligent operational management and monitoring. Figure 4.6 – Inpit tailings disposal at the Tanami An international example of leading practice in a range of areas including cyanide, tailings disposal and general environmental management is the Chatree gold mine in Thailand which is ranked as the safest mine in the world, a remarkable achievement for a mine in an emerging economic region. A GUIDE TO LEADING PRACTICE SUSTAINABLE DEVELOPMENT IN MINING 103
MINE: Chatree gold mine LOCATION: Pichit, Thailand BRIEF DESCRIPTION: Open pit gold mines AREA OF LEADING PRACTICE: Safety; community engagement; international company operating in a developing country HANDBOOK(S) REFERENCE: Community Engagement DESCRIPTION OF INNOVATION: The Chatree mine is the largest gold mine in Thailand. The mine is operated by Akara mining, a Thai subsidiary of Kingsgate Consolidated Limited, an Australian company. The mine provides an excellent example of how foreign-owned companies can work optimally in developing countries. Highlights include: 99% of the 1000-strong workforce is Thai. For six years there has been no lost time injuries (15.3 million hours worked) 31% management positions held by women A significant investment in education and training through scholarships, supporting minerals education at Thai universities and other initiatives Received the Thai National award for Health, Safety and Environment and the Prime Minister’s Labour Relations award for the 5th consecutive year. Thailand is a challenging country for mining companies to gain access to mineral resources. NGOs and community action groups are active. Mindful of this general anti-mining atmosphere, Akara has worked particularly hard on its community relations. In 2007, Kingsgate became the world’s only miner to achieve the Social Accountability SA 8000 accreditation which is maintained to date. 60% of mining royalties go directly to local provinces and village councils. This totalled $4.5 million in 2009. The company has worked to meet various standards and codes including ISO 9001; ISO 14001; OHSAS 18001; ISO 17025; SA 8000 and the Cyanide Management Code. Figure 4.7 – progressive waste dump rehabilitation at Chatree 104 LEADING PRACTICE SUSTAINABLE DEVELOPMENT PROGRAM FOR THE MINING INDUSTRY
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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
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 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: Box 1: Major recent incidents invol
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
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
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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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