United Steelworkers are set to vote on ratifying a new four-year collective agreement with employer ArcelorMittal in the coming days.

Jetti has secured $50 million in funding from existing and new investors to support rapid deployment of the technology across large scale copper mining operations.

The union has requested a one-time signing bonus equivalent to "1% of dividends paid to the mine's owners".

Company has interrupted production at its Timbopeba mine and part of its Alegria mine after prosecutors ordered the evacuation of an area around the nearby Xingu dam.

The underground mine is currently running at 40% of its capacity and is on track to return to full capacity by the end of June.

A contractor's employee was hit in the leg by a loose rock while working at one of the working faces, causing him to fall backwards and strike his head on a rock.