Mining Methods and Machinery · Mining Methods · 1 mark · Multiple choice
A competent copper orebody is tabular, nearly flat (dip below 30°), less than 2 m thick and has erratically located grade. The wall rock is also competent. Which underground method is most suitable?
Breast stoping allows selective horizontal advance through a thin, relatively flat competent orebody. This suits local grade variation while competent rock permits an open working space. Choose D. The other methods generally suit steeper/thicker bodies or introduce support/filling requirements not indicated here.
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