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Severe rock mass damage of undercut and extraction level pillars at El Teniente Mine
Author(s) -
Gomes Alexandre R.A.,
Rojas Eduardo,
Ulloa Juan Carlos
Publication year - 2016
Publication title -
geomechanics and tunnelling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.317
H-Index - 18
eISSN - 1865-7389
pISSN - 1865-7362
DOI - 10.1002/geot.201600058
Subject(s) - undercut , pillar , mining engineering , context (archaeology) , geology , copper mine , rock mass classification , forensic engineering , geotechnical engineering , engineering , copper , paleontology , metallurgy , materials science , structural engineering
Abstract The El Teniente Mine of Codelco is one of the largest underground mine operations in the world. The mine employs massive mechanised panel caving methods with pre‐undercut variants to extract copper‐molybdenum ore, producing 140,000 t/d, mainly of primary copper ore. In the context of a study of rehabilitation measures for collapsed zones at the Esmeralda mine, which is one of Tenientés most important operations, a preliminary assessment of the post‐collapse pillar's rock mass condition was carried out, allowing the characterization of the damage zone surrounding the drifts and some insights into the likely pillar's rock mass damage development. The paper outlines these findings and discusses some underlying factors that may also have influenced the process.