Shareholders want to sue the gold-mining company for allegedly putting profits over safety.
Unions have called for mine bosses to be held criminally liable for the deaths of mineworkers.
This follows the Sibanye-Stillwater tragedy in which seven mine workers were killed.
The death toll at the mine has risen to seven following initial reports that four workers had passed away.
"Regrettably, the last three employees who were recovered passed away from their injuries, bringing the total number of fatalities as a result of the seismic event to seven."
Mine rescue teams were immediately mobilised and three workers were located and were interacting with the rescue teams.
"We've got the rescue teams underground and there's a lot of loose rock, so you can imagine the difficulties."
About R9-billion has been set aside to compensate thousands of silicosis sufferers.
Nearly 1,000 mine workers were trapped underground when a storm cut off power in the Free State.
Operators are currently trying to restore power to the shaft to allow the miners to leave.