Australian billionaire Mike Cannon-Brookes is among backers of a new demand on BHP Group to suspend ties with industry groups that are seen as hindering efforts to meet global climate change goals.

Australia's tax office ruled the company had paid the correct amount of tax on purchases of copper concentrate from a New South Wales mine.

Australian producers are now scrambling to cut supplies as prices plummet on falling demand in the world's top electric vehicle market.

The Australian government committed $3.7 million for the new facility.

United Wambo plans to develop an open-cut mine producing up to 10 million tonnes per year.