Innovative liner support trials in underground hardrock mines

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Texte
Sommaire: New tax rules that can apply to the repayment, extinguishment, or other settlement of a company's debt are finally taking shape. These new rules are far-reaching in their application, and can affect mining companies in a serious, negative way.
Publication: CIM Bulletin
Auteur(s): Robert B. Parsons
Numéro: 992
Volume: 88
Année: 1995
Texte
Sommaire: In September 1993, the flash furnace at Kalgoorlie Nickel Smelter, KNS, was brought offline after almost 12 years of operation. This is a record campaign life for a flash furnace. The furnace was totally rebuilt and the capacity of the plant increased from 540 000 tpa to 750 000 tpa of concentrate throughput. The throughput increase was achieved through the construction of a 525 t/day oxygen plant and upgrading of various plant ancillaries. A number of significant design modifications were...
Publication: CIM Bulletin
Auteur(s): T.A. Apelt, A.G. Hunt, B.J. Elliot
Numéro: 992
Volume: 88
Année: 1995
Texte
Sommaire: At Smoky River Coal Limited (SRCL), economic occurrences of structurally thickened coal deposits form attractive surface mining targets. These steeply dipping, structurally complex deposits require that special attention be given to pit wall design and operational practices.
Where anchor support is feasible, there is potential for reducing footwall waste requirements and/or increasing coal recovery. SRCL has used rock anchors to support footwall slopes since 1985. This paper outlines design...
Publication: CIM Bulletin
Auteur(s): R.F. Dawson, A.S. Bagnall, K. Barren
Numéro: 992
Volume: 88
Année: 1995
Texte
Sommaire: At Smoky River Coal Limited (SRCL), economic occurrences of structurally thickened coal deposits form attractive surface mining targets. These steeply dipping, structurally complex deposits require that special attention be given to pit wall design and operational practices.
Where anchor support is feasible, there is potential for reducing footwall waste requirements and/or increasing coal recovery. SRCL has used rock anchors to support footwall slopes since 1985. This paper outlines design...
Publication: CIM Bulletin
Auteur(s): R.F. Dawson, A.S. Bagnall, K. Barren
Numéro: 992
Volume: 88
Année: 1995
Texte
Sommaire: Since the Mathew's method for open stope design was first proposed by Colder Associates in 1980 it has been applied at a number of mine sites in Canada. The initial hypothesis was based on a relatively small amount of data and the intervening period has allowed the collection of a significant amount of new data to test the validity of the method.
This paper examines a brief history of the evolution of rock mass classification systems to provide background and emphasize their empirical and...
Publication: CIM Bulletin
Auteur(s): S.B.V. Stewart, W.W. Forsyth
Numéro: 992
Volume: 88
Année: 1995
Texte
Sommaire: The Garford bulb anchor is a modified cable geometry developed and patented by Garford Pty Ltd. of Australia, and which has recently become widely available in Canada. It is produced by deforming the seven wires (including the central kingwire) of a standard cable into a bulb* (Fig. 1). Laboratory cable pull tests indicate that the bond capacity of the 25 mm Garford bulb anchor is comparable to the nutcase cable, in excess of the birdcage cable, and significantly higher than standard 7-wire...
Publication: CIM Bulletin
Auteur(s): A.J. Hyett, W.F. Bawden, N. Hedrick, J. Blackall
Numéro: 992
Volume: 88
Année: 1995
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