The union told Reuters on Monday it had not been approached about resuming talks and denied a report quoting the BHP chief executive officer saying the two sides were back at the table.

Relations have been frosty, with BHP accusing the union of preventing non-union maintenance workers from entering the mine, and the union saying that BHP has failed to make back payments to workers.

“That’s the way the company starts to insult the workers, to scare and pressure them, and leave them without money … That is making workers angry,” union spokesman Carlos Allendes said.

BHP has said that it would pay the money that is owed once the strike ends, in accordance with Chilean law.

The workers have continued construction of a camp set up outside Escondida in Chile’s barren high desert, which the union says will provide comfortable conditions in the event of a prolonged strike. In recent days, they have built a basic movie theater and sporting arena.