Palabora Mining says it plans to decrease output by 15% until 15 December because of repair work being carried out at its copper facility.
The South African copper producer said on 25 November that inspections showed cracks had formed at one of its production winders, which prompted the company to begin repair work on 27 November.
The other winder, however, was not impacted by the cracks and production remained normal at the facility.
Palabora said a supplemental feed supply is being sourced from reclaiming existing ore stockpiles on the surface and from smelter secondary materials.
Consequently, the company will operate at an 85% production capacity level during the repair work.
Global mining company Rio Tinto owns 58% stake in Palabora followed by Anglo American with 17% stake.