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| Raise
boring in action at El Teniente: The Atlas Copco Robbins machines
have been upgraded to meet the mine's demands and are equipped with
self-propelled transportation, remote controlled pipe handling,
a muck collector and automatic data logging. |
[Chile]
Upgraded
boxholing
at El Teniente
Two
raiseboring systems from Atlas Copco are playing a key role in increasing
production at the El Teniente copper mine, the world's largest underground
operation.
The Robbins 34RH and Robbins 53RH machines have been substantially upgraded
from previous versions to provide fast and efficient raise boring in restricted
spaces. They are used for upwards drilling of draw bell slot holes as
well as for ventilation raises and ore passes between the production and
haulage levels.
The draw bell slots are approximately 15 m long and 0.7 m in diameter
and a total length of 800 metres for around 45-50 slot holes are bored
annually. The vertical or inclined ventilation raises are 25-50 m long
and 1.5 m in diametre. A total length of around 1000 m are bored per year.
El Teniente, which is one of six in the Codelco Group, Chile's biggest
company, aims to increase its production from 95,000 to 126,000 tonnes
per day by the end of 2005. |
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