More than 220 000 National Union of Mineworkers (Numsa) members are expected to start an indefinite countrwide strike on Tuesday for a double-digit wage increase.
The union wants a 12-percent salary increase, the scrapping of labour brokers and a one-year bargaining agreement.
Numsa members are expected to march in Johannesburg, Durban, Port Elizabeth, George, Cape Town and East London on Tuesday.
A deadlock in negotiations led to a notice of strike action from majority union Numsa, as well as the Chemical, Energy, Paper, Printing, Wood and Allied Workers' Union and the General Industries Workers' Union of South Africa.
Employers have tabled a three-year wage settlement offer of between 7 and 8 percent for different levels of workers in the first year, and CPI-linked increases for 2015 and 2016. - Sapa