versão On-line ISSN 2411-9717
J. S. Afr. Inst. Min. Metall. vol.109 no.4 Johannesburg Abr. 2009
Quest for 'effective pack' support
Brentley, Lucas & Associates, Mining Consultants (Pty) Ltd
Following on the design of good mining layouts and regional support systems, and the implementation of sound strata control practices, stope support is the ultimate strategy to combat the hazards of rockfalls and rockbursts. The primary function of stope support in intermediate and deep level mines is to stabilize the rock mass immediately surrounding stoping excavations, that is, the zone of fractured rock which behaves inelastically around stopes.
Support design is a process resulting in a support system which is both practical and meets or exceeds by a factor of safety the requirements for a particular geotechnical environment.
The aim of this project was to design a support system, which accommodates the factors of rockfalls and rockbursts. The pack support unit must be easily handled, less costly and can be used in stopes without any significant convergence.
The project tested the structural stability of packs to their expected deformation, in order to design a height to width ratio for stopes where little convergence is expected.
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References and bibliography
CSIR Division of Mining Technology. 1999. SIMRAC Project GAP 508. [ Links ]
Rock engineering practice for tabular hard rock mines. A.J Jager, J.A Ryder. [ Links ]
An industry guide to methods of ameliorating the hazards of rockfalls and rockbursts. 1988. Chamber of mines research organization. [ Links ]
Rockbursts and rockfalls. Chamber of mines of South Africa. Research organization.MDP Report [ Links ]
Paper written on project work carried out in partial fulfilment of B.Tech (Mining Engineering)