The JORC Code - Maintaining the standard

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Publication: CIM Bulletin
Auteur(s): J.A. McLennan and C.V. Deutsch
Numéro: 1080
Volume: 97
Année: 2004
Texte
Sommaire: Agnico-Eagle started sinking the Penna Shaft in 1995 with a hoisting plant capable of hoisting 1800 t/d from a 2240 m deep shaft. Exploration success led to the installation of a hoisting plant capable of extracting 4500 t of ore and 1800 t of waste per day from a depth of 2210 m. The introduction of a new rope selection factor, permitting a safety factor of 4.0, represented the breakthrough required for a cost-effective project. This paper describes the process taken to introduce the new...
Publication: CIM Bulletin
Auteur(s): B. McLaughlin
Mots clés: Hoisting, Deep shaft, Monitoring, Rope selection, Safety, Regulations.
Numéro: 1080
Volume: 97
Année: 2004
Texte
Sommaire: For mining companies facing strong international competition and unfavourable commodities’ prices, automation of underground operations has the potential to increase productivity and help cut costs. However, despite considerable technological progress in this field, there still remain many problems to overcome. Furthermore, successful implementation of automation depends also on numerous operational, organizational, and even human factors. In this context, this paper briefly reviews technolog...
Publication: CIM Bulletin
Auteur(s): J. Paraszczak, S. Planeta
Mots clés: Underground mining, Automation, Implementation.
Numéro: 1080
Volume: 97
Année: 2004
Texte
Sommaire: Worldwide, metal mines are going deeper. For example, in Canada there are six such mechanized mines planning production at 3000 m (10 000 ft). Working at such depths challenges all aspects of mining including the provision of ventilation to supply an equitable working climate for personnel and machinery. This paper explores the overall challenges of supplying ventilation in Canada’s deepest mines and how the volumes required could be minimized. This is essential because it must be remembered...
Publication: CIM Bulletin
Auteur(s): S.G. Hardcastle, C.K. Kocsis
Mots clés: Deep mining, Ventilation, Mechanization, Health, Environment.
Numéro: 1080
Volume: 97
Année: 2004
Texte
Sommaire: Noranda’s Brunswick mine is a 10 000 t/d producer of lead-zinc-copper-silver ore that has been in operation since 1964. Mining of this multiple lens deposit is primarily by blasthole stoping techniques between 400 m and 1200 m below surface. The combination of a high overall extraction ratio, an overall steeply dipping tabular shape, and high horizontal stresses (twice the vertical) have elevated the induced stress regime to levels comparable to much deeper operations. Improved mine design,...
Publication: CIM Bulletin
Auteur(s): B. Simser, V. Falmagne
Mots clés: Rockmass, Seismic monitoring, Stress, Brunswick mine.
Numéro: 1080
Volume: 97
Année: 2004
Texte
Sommaire: Many underground mines are achieving extended life and optimizing existing facilities by mining at greater depths. The challenges to do this require a sound engineering approach to mine design and mine services, as well as ingenuity in safety design. The social consequence is full utilization of existing infrastructure.
Accessing ores at depths of 2000 m to 3000 m requires exceptional hoisting design. May’s theme issue includes a paper that examines a case study of one such hoisting plant,...
Publication: CIM Bulletin
Mots clés: Mining at depth
Numéro: 1080
Volume: 97
Année: 2004
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