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Basic Principles For Stable Gullies In The Gold And Platinum Mines Of South Africa
Gullies are the vital in-stope excavations that provide access for mining personnel and material to, and mined ore from, the producing faces in the tabular hard rock mines. They pose a serious proble
Jan 1, 2002
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Clustering-based iterative approach to stope layout optimization for sublevel stoping
By M. Kumral, Y. A. Sari
Underground mining operations tend to have higher operating costs than surface mines. When metal prices decrease, profitability is jeopardized due to the high costs. Therefore, mining management harne
Mar 1, 2021
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Enhancement of Profitability of Central African Copperbelt Operations using Direct Cobalt Electrowinning Process
By N. Mulaudzi, S. Archer
"Direct cobalt electrowinning was developed to produce unrefined cobalt metal as an alternative to producing a mixed hydroxide product (MHP), which is the common cobalt intermediate product in African
Jan 1, 2015
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Assessment of vibration exposure of mine machinery operators at three different open-pit coal mines
By A. Tekin
In almost all branches of industry, machinery and equipment in operation cause vibration. Some sources of vibration affect only the operator’s hands, fingers, and arms, while others have adverse effec
May 2, 2022
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The Balancing Act Of Size Vs. Cost Vs. Practicality
By Org de Wet
This paper summarises the strategy for selection between a two module coal plant incorporating large, but less equipment, and a three module coal plant with more but smaller equipment. The two options
Jan 1, 2006
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Density – A contentious issue in the evaluation and determination of Resources and Reserves in coal deposits
By L. Roux
The initial evaluation of a coal deposit often raises uncertainty with regard to the accuracy of the reported Resources and Reserves. Reconciliation of results from mining and beneficiation with the o
May 1, 2021
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Evaluating the potential drilling success of exploration programmes using a three-dimensional geological model – A case study
By R. K. W. Merkle, F. A. S. Reyneke, Z. Harris, P. W. J. Delport
The technological advancements in computing power in the last 30 years have enabled the practical visualization of complex geological environments in three-dimensional (3D) space. 3D models and their
Feb 2, 2022
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An Evaluation of the Thermal Fatigue Performance of Three Alloys for Casting Mould Applications
By V. van der Merwe, C. W. Siyasiya
"A petrochemical company experiences premature thermal fatigue failure of the casting moulds used in catalyst production. The aim of the project was to find an alternative alloy that would outperform
Jan 1, 2016
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Accretion formation on the refractory lining during the melting of ferrosilicon
By A. M. Garbers-Craig, T. Coetsee, T. M. Nemavhola
Accretions often form in furnaces when slag and charge materials attach to the refractory wall and build up over time. Accretion formation is usually unwanted because it reduces the working volume of
Feb 2, 2021
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An Evaluation Of The Internal Application Of Pipeline Linings/Coatings - 1 Introduction
By L C. Pretorius
Pipe pigging is a technique for the in situ (field) coating application, to create a seamless internal anti-corrosive lining of long pipelines. The technology originated in the cleaning of pipes, and
Jan 1, 2006
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Seismic Monitoring Of A Simulated Rockburst On A Wall Of An Underground Tunnel
By A. M. Milev
A simulated rockburst was conducted underground at Kopanang Mine, previously called Vaal Reefs No. 9 Shaft. The rockburst was simulated by means of a large blast detonated in solid rock close to a cro
Jan 1, 2001
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The Use Of Commercial Oxygen Probes During The Production Of High Titania Slags
By J. M. A. Geldenhuis
This work is concerned with studying possible reactions in the ilmenite furnace which may control the product quality of both slag and metal. Two different approaches were followed: comparing actual f
Jan 1, 1999
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The Evaluation Of The AAC Pump-Cell Circuits At Anglogold?s West Wits Operations
By J. Rogans
This paper discusses the comparative performances of the three activated carbon adsorption circuits at the West Wits operations of Anglogold. These circuits consist of two pump-cell circuits (at Two P
Jan 1, 2002
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Coupled hydromechanical modelling of surface subsidence in crystalline rock masses due to tunnel drainage
By C. Zangerl, K. F. Evans, S. Loew
ABSTRACT: Settlements above fractured crystalline rock masses are rarely observed and in the past, geotechnical engineers would not expect substantial subsidence to occur in association with a deep tu
Jan 1, 2003
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In-situ stress measurements in an underground oil storage cavern using hydro-fracturing and overcoring methods
By S. O. Choi, C. Park, C. Sunwoo
Two methods of stress measurements have been executed on the surface and underground to con-struct an oil storage cavern using hydro-fracturing and overcoring method. The first measurement has been pe
Jan 1, 2003
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Keynote Address: Population And Poverty, Energy And Technology: Coal, Mining And A Proper Start For The Century
By R. L. Lawson
I?ve been asked to appraise the global role of coal and mining, and the best place I can think of to begin is with the World watch Institute, which purports to monitor all things global. Last fall the
Jan 1, 2001
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Modifications to underground coal mine personnel transport vehicles for mine rescue duties
By S. L. Bell
Most Australian longwall coal mines are currently working coal faces up to nine kilometres from the surface. In the event of a mine emergency walking this sort of distance wearing breathing apparatus
Jan 1, 2003
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Dam foundation design considering scattering of its deformability
By M. Nakamura, T. Akamatsu
Embankment dams are often constructed on soft rock foundations in Japan, so it is important to precisely predict deformation of the foundations due to fill placement at the design stage. In order to a
Jan 1, 2003
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The Distribution Of Metallic Elements In Granulated Nickel Converter Matte Phases
By E. L. Thyse
Keywords: Pyrometallurgy, converter, nickel, matte, distribution Metallic elements occupy a wide range in granulated nickel converter matte phases. The distribution of these metallic elements, pa
Jan 1, 2011
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A comparison between hydraulic and pneumatic rockdrills
By D. Clement
A comparison between hydraulic and pneumatic rockdrills by D. CLEMENT The regulation of compressed-air reticulation systems is very poor compared with that of electrical systems; this means that elect
Jan 3, 1975