KONKOLA Copper Mines (KCM) says the contract for U and M Mining Services expired on December 31, 2012 and terms for renewal have not been agreed.
And the mining giant says it is set to reach the more than 400,000 tonnes of copper production per annum.
Company public relations manager Joy Sata said in its quest to be a world-class mining company, KCM was striving to raise production without compromising on quality and efficiency.
Ms Sata said in a statement released yesterday that KCM needed to have a solid foundation on which this growth would be sustained.
"KCM is committed to all projects that it has undertaken to expand and increase the life of the mine at Nchanga and Konkola.
"KCM operates two open pit mines in Nchanga and one at Chingola Open Pit F and D which is mined by a contractor, U and M Mining Services of Brazil," she explained.
She said U and M's contract expired on December 31, 2012 and terms had not been agreed for the renewal.
She pointed out that during the period of demobilisation, KCM expects a gap as management explores options of operating the pit.
However, employees under U and M working at COP F and D would be given priority for engagement once the pit is operational.