Expelled ANC Youth League president Julius Malema is expected to address striking workers at Lonmin's Marikana mine on Saturday.
Suspended league spokesperson Floyd Shivambu confirmed Malema would be at the mine at 11am on Saturday.
Shivambu visited the workers on Friday.
"The workers are determined to fight on. There is no talk of retreating, they are determined," he said.
A total of 34 people were killed in a shootout that erupted near the mine on Thursday when police tried to disperse striking miners.
More than 78 people were injured.
Another 10 people had by then been killed in the violent protests at the mine over the past week.
The protests were believed to be linked to rivalry between the National Union of Mineworkers (NUM) and the Association of Mineworkers and Construction Union (Amcu) over recognition agreements at the mine. Workers also wanted higher wages.