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BHP plans major underground expansion at Olympic Dam using block cave mining.

Market News
19 Oct 2026
Proactive Investors
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Bullish
BHP plans major underground expansion at Olympic Dam using block cave mining.

BHP is preparing for a multi-billion-dollar underground expansion at its Olympic Dam copper mine in South Australia, using block cave mining to access more ore. This method allows cost-effective extraction of lower-grade ore by letting the rock above collapse progressively. The new block cave resource significantly increases the copper resource base, supporting BHP's long-term Australian copper growth strategy. Despite a 19% drop in copper output in the September quarter due to operational challenges, BHP maintains its full-year production guidance of 1.65 to 1.8 million tonnes.

BHP's Olympic Dam expansion plans provide context for Basic Materials sector activity on Pluang. As of Oct 20, 2026 07:11 WIB, 30 of 83 Basic Materials stocks rose while 51 fell. Notable movers include SSL at USD 15.72 with a -3.79% change and MP at USD 39.04 with 75% buy orders and a typical hold time of 16 days.

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