The union said workers at, JX Nippon Coppe's Caserones mine in Chile would go on strike on Tuesday after final negotiations on collective labor contracts failed on Monday.
The union said there had been no progress in government-mediated negotiations, prompting its members to agree to a strike.
The union said in a statement that an agreement could not be reached because the company had said it had no more budget in the negotiations and was therefore unable to make a new offer.
Chile, the world's largest copper producer, is in the midst of tense labour negotiations at several mines, including Escondia of BHP Billiton and Andina (Andina) of Chilean state copper company (Codelco), at a time when supplies are already tight, straining the market.
Caserones produced 126972 tons of copper in 2020.




