Mining of orebodies under shear loading Part 1 - Case histories

F. T. Suorineni, P. K. Kaiser, J. J. Mgumbwa, D. Thibodeau

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The conditions for rockbursts occurrence are traditionally identified as: high stress, high extraction ratio, strong brittle rocks, folding, faulting and unfavourable excavation geometry. Some rockbursts cannot be explained by any one or a combination of these factors. Salamon (1983) stated that a disconcerting feature of rockbursts is that they defy conventional explanation. Based on detailed review of case histories, this paper identifies oblique loading of orebodies by the major far field principal stress as a cause of rockbursts. Orebodies subjected to this loading condition are termed orebodies in shear. Orebodies in shear are subjected to compressive and shear loads. This paper shows it is risky to generalise that tabular orebodies have their axis perpendicular to the major far field principal stress. This study identifies characteristics of orebodies in shear and the consequences of not taking this loading mechanism into account in the planning, design and mining of such orebodies.

Original languageEnglish
Pages (from-to)137-147
Number of pages11
JournalTransactions of the Institutions of Mining and Metallurgy, Section A: Mining Technology
Volume120
Issue number3
DOIs
Publication statusPublished - Jan 1 2011
Externally publishedYes

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Keywords

  • Case histories
  • Design
  • Dilution
  • Mine planning
  • Orebodies in shear
  • Orebody geometry
  • Rockburst
  • Stress orientation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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