Roadbed preparation at INCO Limited

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Mots clés : Underground mining;Roadways;Underground roadways
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Texte
Sommaire: A program initiated to improve the service life of the magnesite-chrome refractory in the top blown rotary converters at INCO’s Copper Cliff Nickel Refinery identified slag corrosion as a major wear mechanism. Target slag compositions were established to produce a non corrosive slag. A plant program to achieve this target slag by the addition of controlled amounts of dolime and MgO was instituted. Addition to rates of the slag modifiers was optimized based on the slag composition assays...
Publication: CIM Bulletin
Auteur(s): G. Cuthbert, R. White, B. Martin, C. Doyle, J. Hrepic, C. Díaz
Mots clés: Corrosion control, Magnesitechrome refractory linings, Metallurgy, Refractories, Rotary converters, Slag composition control.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: Characterizing the spatial distribution of rock stresses is a challenge, especially in the geologically complex environments typically found at most metalliferous mines. Therefore, instead of focusing, specifically, on the task of making stress measurements, the engineer should instead attempt to develop a better understanding of the interaction between stress, mining geometry and rock mass behaviour.
This paper demonstrates such an approach using a Canadian Shield hardrock mine case study,...
Publication: CIM Bulletin
Auteur(s): M.W. Grabinsky, J.H. Curran, W.F. Bawden
Mots clés: Rock mechanics, Rock stresses, Stress, Rock mass behaviour, Hardrock mining.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: The nature of minor element values and impurities are important both in the assessment of new properties and in the continuing improvement of operating plants. Impurity elements are frequently present as fixed solid solution impurities in association with the constituent minerals of a deposit or process streams in a concentrator. This paper uses five case studies to illustrate the application of simple regression analysis to the evaluation of minor element distribution in both operating mines...
Publication: CIM Bulletin
Auteur(s): M.J. Fairweather
Mots clés: Regression analysis, Metallurgy, Impurity elements, Cominco.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: In developing a backfill system handling tailings feed to and from the storage silo, it is necessary to establish a slurry laboratory to develop the technology and silo design criteria.
This paper presents the principles involved in such development and the importance of testing principles for optimizing the slurry system. Evaluation procedure based on experiments is applicable to a wide range of materials and allows silo design by scaling up the data gained from model tests. Silo simulation...
Publication: CIM Bulletin
Auteur(s): L.J. Chen
Mots clés: Backfill, Silo design, Slurry systems.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: The principles of noise control are described with particular emphasis on personal active units as opposed to passive ear muffs presently in general use. A discussion follows for their potential use in a mining environment.

Nous décrivons brièvement quelques principes de contrôle de bruit à l’usage personnel, puis nous passons en revue quelques casques commerciaux dotés de ces circuits à principe actif. Enfin nous discutons de leur usage potentiel dans le contexte minier.
Publication: CIM Bulletin
Auteur(s): R. Le
Mots clés: Health, Noise control, Ear protection. Contrôle de bruit, Casques.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: In the production of high quality steel, the understanding of the interactions between liquid steel and refractories and of their effect on steel purity and cleanness are becoming more and more important. An experimental study has been performed in order to estimate the importance of the reaction between a MgO-based tundish refractory and an Al-killed steel. The results show a pollution of the liquid steel:
• the silicon content of the liquid steel increases due to the reduction of the silica...
Publication: CIM Bulletin
Auteur(s): J. Lehmann, M. Boher, M.C. Kaerlé
Mots clés: Metallurgy, Liquid steel, Refractory, MGO-based tuntish refractory.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: This paper presents the results of research that has been undertaken in order to develop an improved method of determining the strength of hard-rock mine pillars. Pillars are found in various shapes and sizes in all underground mining operations. Prudent engineering design requires that if pillars are to perform as desired, both the pillar strength and the pillar stress must be determined. A detailed pillar stability study has been combined with an extensive database of published pillar case...
Publication: CIM Bulletin
Auteur(s): P.J. Lunder, R.C. Pakalnis
Mots clés: Rock Mechanics, Hard-rock mine pillars, Pillar strength, Underground mining.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: The ISO 9000 Quality Management System Standards have become internationally accepted as the way to manage quality assurance. The author has developed a Maintenance Management System Standard using ISO 9001 as a model and is working with a major base metal mining company to implement this. This paper describes the structure of the standard and the steps required for its implementation. Using a management standard ensures that a system is maintained, reviewed by internal audit, and when...
Publication: CIM Bulletin
Auteur(s): K. Musgrave
Mots clés: Maintenance, Mine management.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: FLEX 31 is a chemically enhanced sodium isopropyl xanthate that has shown improved collection
properties over SIPX for copper-bearing and copper-activated minerals. Characteristics such as improvement of recoveries with lower dosages and high pyrite and pyrrhotite rejection capabilities have all been exhibited by FLEX 31. The most improved results have been seen in sphalerite flotation. Plant trial work carried out in the zinc circuit at the Louvicourt Concentrator in northern Quebec has...
Publication: CIM Bulletin
Auteur(s): R.S. MacPhail
Mots clés: Copper, FLEX 31, Flotation, Louvicourt mill, Mineral processing, Zinc flotation
kinetics.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: Several case studies are presented on the use of seismic techniques to map active structures, evaluate changes in stress levels, and identify the conditions leading to large magnitude seismic events and the generation of rockbursts in Canadian mines. The results suggest that microseismicity can be used to identify the orientation of active fractures; define regions of relatively high and low stress, and those most likely to host a rockburst; determine the role of local stress on observed...
Publication: CIM Bulletin
Auteur(s): C-I. Trifu, T.I. Urbancic
Mots clés: Active fractures, Microseismicity, Mining-induced microseismicity, Rockbursts, Shear and normal stresses, Stress regime.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: The paper looks at the basic theory of tribological wear and the role played by the lubricant and its additives. It presents the argument that the “real cost of lubrication” is not the purchase price of the oil or grease, but rather the costs associated with not using the correct lubricant.
A number of examples are presented, covering oils, greases and additives, in which a detailed evaluation of the application has shown that when all of the benefits of using the best lubricant/additive are...
Publication: CIM Bulletin
Auteur(s): R. Melley, P. Wissner
Mots clés: Maintenance, Lubricants, Tribo -logical wear
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: This paper reviews the installation, startup, and operation of a comprehensive monitoring and targeting management technique in which all plant utilities (i.e., electricity, natural gas, compressed air, and water) are managed as controllable resources in the same way that raw materials, mined ore, personnel and capital are managed.
The essential elements of monitoring and targeting (M&T) include:
• gathering in a systematic, disciplined way the utility information by energy account centres;
•...
Publication: CIM Bulletin
Auteur(s): D. Pacey
Mots clés: Equipment, Garson Mine, INCO, Energy monitoring.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: Integrating seismic reflection, borehole geophysical, and physical rock property studies is an effective means of mapping lithological contacts and structures in the crystalline crust.
At Les Mines Selbaie in the northern volcanic zone of the Late Archean Abitibi Subprovince, a high-frequency seismic reflection profile has provided the first images of deep crustal structures of this important polymetallic mine site. Physical rock property and borehole geophysical studies confirm that...
Publication: CIM Bulletin
Auteur(s): G. Perron, B. Milkereit, L.E. Reed, M. Salisbury
Mots clés: Geology, Seismic reflection, Borehole geophysical studies, Les mines Selbaie.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: Mining hoists are major components of any underground mine, however, the detailed design work required to get the actual power required for a particular hoist is outside the scope of preliminary feasibility studies. Nonetheless, a hoist is costly. Therefore, an accurate estimate is needed for the design parameters and the power required. There are two methods available, namely, the O’Hara method and the Society of Mining Engineers’ method. Tests were done for both methods employing nine...
Publication: CIM Bulletin
Auteur(s): D.J. Farmer
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: When mining high grade, narrow ore bodies, the mining method often implies a very detailed knowledge of the ore contacts to avoid unacceptable ore loss and waste rock dilution. During the past decade, the use of microprocessor based drill monitoring equipment has become an accepted technique, even for percussive drilling. On the basis of the recorded drill performance, such as penetration rate, torque pressure, thrust etc., a fast evaluation of the lithological sequence of the ore zone can be...
Publication: CIM Bulletin
Auteur(s): Håkan Schunnesson, Kirsten Holme
Mots clés: Drill monitoring, Geology, mine planning, Viscaria copper mine.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: The Darrehzar porphyry Cu deposit is situated in the Urumieh-Dokhtar magmatic suite of Central Iran. The REE and trace element data suggest that the deposit lies within a continental margin setting. Phyllic and propylitic alteration are pervasive in the area but potassic and argillic
alteration are not readily recognized on the surface. This is possibly the result of supergene
weathering of the surface rocks or because of an intense phyllic overprint. Poor soil development and abundant...
Publication: CIM Bulletin
Auteur(s): H. Ranjbar
Mots clés: Geology, Lithogeochemical patterns, Iran.
Numéro: 1014
Volume: 90
Année: 1997
Texte
Sommaire: This paper describes the results of convergence measurements conducted about five years for the re-use gate roadways at OAL lignite mine in Turkey. Double lignite seams separated with a marn layer, are mined with longwall retreating mining system at the mine. Rib pillar has been abandoned and gate roadways were planned to be packed for the re-use of full extraction. Various packing systems have been attempted, namely three rows of wooden chock, one row of wooden chock plus concrete wall and...
Publication: CIM Bulletin
Auteur(s): Y.S. Istanbulluoglu, C. Karpuz
Mots clés: Rock mechanics, Gate roadways, Coal recovery, Packing.
Numéro: 1014
Volume: 90
Année: 1997
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