Nine miners died after an underground fire the Doornkop mine on Gauteng’s West Rand.
The bodies of eight men were found on Thursday after a fire broke out underground.
Another two Harmony workers have died after blasts at the Joel and Kusasalethu mines.
Questions are being raised about Harmony Gold's miners' compliance with safety regulations.
African Rainbow Minerals Chairperson Patrice Motsepe says safety is a priority for the company.
Teams have now broadened their search for a missing miner at Harmony Gold's Doornkop mine.