A methodology for rock mechanics feasibility studies

Abstract The feasibility assessment of a mineral deposit requires the construction of a geomechanical model of rock mass properties, for the purpose of preliminary mine design. The Noranda Technology Centre has been involved in the development of geomechanical models for several mineral deposits at the feasibility stage. Each model is constructed through intact rock testing, geotechnical core logging,
geotechnical mapping and rock mass classification. Rock mechanics principles are used to develop conceptual stope designs and propose possible mining sequences. This methodology is applicable to both new mining projects and to the development of new areas within an operating mine. This paper explains how the geomechanical model is developed and reviews its application to several case studies.
Keywords: Rock mechanics, Feasibility studies, Geomechanical modelling.
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Summary: The Geomechanics Research Centre at Laurentian University in Sudbury, Canada, has undertaken a five-year research program into the design of support appropriate for controlling damage caused by rockbursts. Rockburst damage mechanisms in Canadian hardrock mines are reviewed and a support design approach is presented. Each element in a support system performs a reinforcing, holding, or retaining function. The desirable load-displacement characteristics for elements in burst-resistant support...
Publication: CIM Bulletin
Author(s): Rock mechanics, Research and development, Support designs.
Keywords: Paper reviewed and approved for publication by the Rock Mechanics and Strata Control Committee of CIM.
Issue: 998
Volume: 89
Year: 1996
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Summary: A set of new blast damage criteria has been developed, with special reference to blasthole mining operations, for assessing damage by incorporating the vibration level, rock properties, site characteristics and the effects of ground support systems. The main objective of this work was to provide a database with reasonable accuracy for use in optimizing blast design, numerical analysis and ground control expert system module development.
The new damage criteria allow one to estimate the degree...
Publication: CIM Bulletin
Author(s): T.R. Yu, S. Vongpaisal
Keywords: Blast damage criteria, Blast damage index, Underground blasting, Blasthole mining, Dynamic tensile strength, Blast design.
Issue: 998
Volume: 89
Year: 1996
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Summary: The Williams Mine is Canada’s largest gold producer, with annual production of 450 000 ounces from 2 300 000 tonnes of ore. Highly mechanized and automated underground mining practices are employed in order to achieve and maintain high levels of productivity and minimize costs.
The mine ventilation system is modified to include a new vent raise and variable pitch vane-axial fan. This addition allows several fan installations underground to be decommissioned. A substantial net savings in...
Publication: CIM Bulletin
Author(s): L. Henry Smith, David C. Arthur
Keywords: Underground mining, Ventilation, Heating costs, Energy savings, Heat exchangers, Variable frequency drives, Heat recovery, Propane burners, Vane-axial fans.
Issue: 998
Volume: 89
Year: 1996
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