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The North Lyell Tunnel, Tasmania
THIS tunnel, which is an adit 7000 ft. long, was undertaken by the Mount Lyell Mining and Railway Company Limited to connect its treatment works with the North Lyell mine at depth, with a view to effe
Jan 1, 1929
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The Alluvial Gold Mining Industry in New Zealand
By B S. Utting, W J. Cowie
The alluvial gold industry of New Zealand is based on the placer deposits in Otago and on the West Coast. Production from these since discovery in the 1850s has been an estimated 480 t (15 Moz) of gol
Jan 1, 1990
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Precious Metal Exploration in the Longwood Range Southland
The results of precious metal exploration carried out by Amoco Minerals New Zealand Limited over EL 33-137 in the Longwood Range, Southland, are described. Widespread gold and platinum in alluvial dep
Jan 1, 1983
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An Investigation of Factors Affecting the Long-term Reliability of Extraction Level Pillars in Deep Block and Panel Caves
By P Duplancic and C R Lilley, R Hudson, D Beck
For deep block and panel caving mines, undercut or extraction level instability can have as much impact on overall recovery as underbreak or the premature ingress of waste. If the area of the mine aff
May 9, 2016
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Precious Metal Mineralisation Associated with the Cretaceous Paparoa Metamorphic Core Complex, New Zealand
Reconnaissance geochemical exploration in the vicinity of low angle detachment faults which bound the core of the Paparoa metamorphic core complex yielded Au up to 14 ppm, with 35% of greywacke, grani
Jan 1, 1995
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Rehabilitation of the Collapsed Panel 1K North in the Deep Ore Zone Block Cave Mine
By A Kurniawan, A Sjadat and M Akhasyah
PT Freeport Indonesia’s Deep Ore Zone (DOZ) is a block cave mining operation that has been in production for 15 years. DOZ is located approximately 900 m below surface and has an average production ra
May 9, 2016
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A Few Observations on Mine Surveying and Surveying Instruments
The principles of geometry and trigonometry are so continuously used by mining engineers for the purpose of accurately and intelligibly recording their measurements, that the writer is prompted to lay
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Greenland Group Deformation and the Structural Controls oif Gold Mineralisation Within the Reefton Goldfield: From the General Gordon to the Golden Lead
Deposits of the Reefton Goldfield, West Coast, New Zealand, are hosted on N-NE striking, upright folds of the Greenland Group. High-grade quartz lodes are hosted on axial planar shears, typically have
Jan 1, 2001
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Removal of Arsenic in Enargite from Copper Ores by Flotation and Leaching in NaHS Media
Removal of Arsenic in Enargite from Copper Ores by Flotation and Leaching in NaHS Media
Sep 13, 2010
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The Occurrence of Uranium Ore at Sleisbeck, N.T
Uranium ore at Sleisbeck, N.T., occurs as lenticular bodies associated with zones of bleached carbonized schists lying between walls of closely folded quartzite. The ore consists mainly of uranium mic
Jan 1, 1955
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VertiMill« - Development of Circuit Survey and Performance Evaluation Protocols
By K Kermanshahi, J Allen, MáHilden, M Powell, S Mwansa, S Palaniandy
Approximately 420 VertiMills« (VTM) have been installed in mineral processing plants throughout the world, mainly in tertiary and regrind applications plus several in secondary grinding duties. Metso
Jul 15, 2013
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The Henty Mining Experience
Goldfields (Tasmania) Limited operates a small, high-grade underground gold mine on the West Coast of Tasmania, 30 kilometres north of Queenstown. The main orebody, Zone 96, was discovered in 1989, wi
Jan 1, 1998
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The Proton Precession Magnetometer as a Prospecting Instrument
By Haigh J. E
An accurate measure of the earth's magnetic field can be made in a few seconds with the portable proton precession magnetometer. Such an instrument increases the applicability of the long success
Jan 1, 1963
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The sampling characteristics of grains contaminated by mycotoxins
By G J. Lyman, S A. Tittlemier
International regulations exist to manage the concentrations of mycotoxins such as Ochratoxin A (OTA) and deoxynivalenol (DON) in grains and prevent health risks from excessive exposure to OTA and DON
May 9, 2017
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Computer Simulation of Roadway Development to Support Longwall Mining
Prefeasibility planning and cost estimation of conveyor systems has historically been undertaken by comparing fixed plant transport requirements to that of similar systems in service. This paper descr
Dec 6, 2010
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Production of Cobalt Oxide, Cobalt Sulphate and Electrolytic Cobalt
In, one stage of the purification sequence of the zinc sulphate electrolyte used at Risdon, cobalt is, precipitated as cobalt nitroso-,B-naphtholate, which is separated from the solution by filtration
Jan 1, 1949
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Electricity û Demand and Supply Conservation and the Environment
Conservation and environmental issues are raising their profile with respect to both demand restraint and electricity supply options. In New Zealand, conservation pressures and energy efficiency need
Jan 1, 1990
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Separation of Nickel and Cobalt from Manganese, Magnesium and Calcium by Synergistic Solvent Extraction - From Batch Tests to Pilot Plant Operation
Separation of Nickel and Cobalt from Manganese, Magnesium and Calcium by Synergistic Solvent Extraction - From Batch Tests to Pilot Plant Operation The synergistic solvent extraction system consistin
Sep 13, 2010
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A Review of the Mineralogy of Some Low Grade South Australian Iron Ores in Relation to Beneficiation Testing
Some low grade South Australian iron ores were classified on the basis of their physical characteristics. Ores from Mount Christie and Billeroo are coarse grained mixed ores; Mount Christie ore could
Jan 1, 1964
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Addressing the challenges associated with the modelling of iron ore in vibrating screens
By S Reid, W Chen, T J. Donohue, A Katterfeld
The use of discrete element modelling (DEM) is widespread in the materials handling field, and is used for many applications. One of the important limitations in using DEM is the number of particles t
Jul 24, 2017