Harmony Gold Mining has halted production at its South Africa-based Merriespruit 3 shaft following the death of a miner due to a tramming mishap at the mine.
The accident follows the death of another miner at Harmony's Elandsrand mine on 27 November, which halted output until 30 November.
The Department of Mineral Resources, in conjunction with the company's management, has commenced investigations into the cause of the accident.
Harmony spokeswoman Esha Brijmohan told Reuters that South Africa's National Union of Mineworkers announced a day of mourning at the mine on 1 December, stopping all production work.
In 2009 over 120 workers have died in mines in South Africa.