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Northside Storage Tunnel Project, Sydney: Tunnelling and Groundwater Control Beneath the Middle Harbour
By R. A. Gee, G. B. Ashton, S. T. Warren, P. N. Groves
Northside Storage Tunnel provides 500 megalitres (Ml) (130 million gallons) of storage capacity to capture stormwater/sewage overflows into Sydney Harbour. The6.6 m diameter TBM driven tunnel traverse
Jan 1, 2001
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Wet concentrator plant design implications using computer modeling techniques
By R. M. G. Machunter
Computer models of metallurgical circuits are extensively utilised in design, and prediction of overall plant separation performance. As always, in the final optimised flowsheet design there is a com
Jan 1, 2005
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An Innovative Approach for Gob-Side Entry Retaining by Roof Cutting in Steeply Pitching Seam Longwall Mining with Hard Roof: a Case Study "Mining, Metallurgy & Exploration"
By Li Zhang, Jing Zhao, Chuanwei Zang, Shuanlin Wang
The application of gob-side entry retaining (GER) in steeply pitching seam longwall mining with a hard roof has always been a difficult problem. Based on the simplified roof beam mechanical model, the
May 6, 2020
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Medium-Temperature Pressure Leaching Of Copper Concentrates - Part I: Chemistry And Initial Process Development
By J. O. Marsden
Over the past eight years, Phelps Dodge (a subsidiary of Freeport-McMoRan Copper & Gold, Inc.) devoted a significant amount of effort to the development of a suite of processes for the effective hydro
Jan 1, 2007
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Defining the Niche of Ground Freezing
By Paul C. Schmall, Arthur B. Corwin, Derek Maishman
Ground freezing occupies a unique and important niche in underground construction, fulfilling a geotechnical need that is difficult, or sometimes impossible, to fulfill through other groundwater contr
Jan 1, 2005
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Policy to Practice: Strategic Environmental Assessment in the Real World
By F. M. McEvoy, E. J. Steadman, R. Murfin
In England, the provision of aggregate is determined by the historical relationship between construction and aggregate consumption. This approach does not necessarily lead to sustainable decision-maki
Jan 1, 2005
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Annual Review 2006 – Mining Review
By Staff
The mineral sector is a fundamental part of the U.S. economy. It contributes to the real gross domestic product (GDP) at several stages—basic (mining), intermediate processing, manufacturing of finish
Jan 1, 2007
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Recent Developments In Dense Medium Cyclone Circuit Design – Preprint
By L. Watters, R. Terry, D. Placha
Dense medium cyclones are the preferred means for cleaning 1/2 in. x 14Mesh to 28Mesh (12.7 mm x 1.0 mm to 0.6 mm) raw coal and are becoming a common choice for cleaning raw coal from a nominal top si
Feb 24, 1997
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Differential Separation Of Albite From Microcline By Monovalent Salts In Hf Medium
By C. Demir, M. S. Celik, I. Gülgonul
Na-feldspar (albite) and K-feldspar (microcline or orthoclase) are major feldspar minerals with identical crystal structures and physicochemical properties. Flotation appears to be a unique method of
Jan 1, 2002
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Non-Invasive Exploration In An Environmentally Sensitive World
By K. E. Livo, D. H. Knepper
Modern remote sensing provides a means for locating and characterizing exposed mineralized systems in many parts of the world. These capabilities are non-invasive and help target specific areas for mo
Jan 1, 2004
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Bacterial Pretreatment To Enhance Silver Recovery From Artvin-Kafkasör Ore By Cyanidation
By Ü. Atalay, G. Alaeddinoglu, G. Özcengiz, G. Özbayoglu, Z. Özdemir
In this study, bacterial pre-treatment was applied before cyanidation in order to enhance the solubilization of silver from Artvin-Kafkasör ore Direct cyanidation process was found inefficient to reco
Jan 1, 2001
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Mechanical And Conventional Excavating Experience In Oil Shale Shafts And Tunnels
By L. A. Weakly, D. A. Weiss, R. B. Crookston
A presentation of experience gained from using mechanical and conventional equipment for excavating shafts, raises, tunnels and other openings in various Colorado oil shale mining properties.
Jan 1, 1983
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Processing Of Arsenic Bearing Gold Ores (2002 SME Annual Meeting)
By V. E. Chrapunov, T. V. Chnyrenkova, R. A. Isakova, V. A. Luganov
Arsenic-gold bearing ores are used as a flux in smelting or leached out to extract gold. To decrease arsenic content in processed materials and to break up the lattice to free the gold, raw materials
Jan 1, 2002
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Vanadium trends in exploration; markets and future demands
By A. D. Hammond
"The drop in iron ore prices has claimed an unwitting casualty in vanadium. Vanadium is dominantly produced as a coproduct of steel production. The recent shutdown at EVRAZ’s Mapochs steel-vanadium op
Jul 1, 2016
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The borehole monitoring experiment: field measurements of reservoir conditions and responses in longwall panel overburden during active mining
By S. J. Schatzel
In order to better understand the effects of longwall mining on the methane reservoir overlying the panel, the National Institute for Occupational Safety and Health/Pittsburgh Research Laboratory (NIO
Jan 1, 2009
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Thiourea As A Lixiviant For Gold And Silver
By J. Brent Hiskey
Thiourea is a reagent capable of complexing gold and silver. With the proper oxidant, thiourea can effectively dissolve metallic gold and silver. A thiourea leaching system possesses potential advanta
Jan 1, 1981
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Construction Phase Services for Australian and North American SEM Tunneling - NAT2024
By Yun Bai, Sarah Wilson, Michael Salcher, Mark Trim
Over the last decade more than 62 miles (100 km) of civil transport tunnels were constructed in Sydney, Australia, using the sequential excavation method (SEM). The WestConnex motorway tunnels, each s
Jun 23, 2024
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The Effect Of Laboratory Cell Design On Flotation Machine Hydrodynamics, Solids Suspension And Particle Recovery
A large lab apparatus was designed using a scale-down methodology based on the design legacy of the current FLSmidth commercial forced air flotation machines. This new apparatus, along with a new test
Jan 1, 2012
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Newmont Cuts Costs and Increases Reserves at Carlin
By Bruce D. Hansen
For many years, Newmont has focused on improving its operations. After the merger between Newmont and Santa Fe Pacific Gold, Newmont created synergies of more than $50 million a year in Nevada. This
Jan 1, 1999
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The United States? Role With The International Tunnelling Association
By Harvey Parker
The International Tunnelling and Under-ground Space Association (ITA) is a nonprofit organization that represents all aspects of the tunneling and underground space industry worldwide. The United Sta
Jan 1, 2007