It turns out that the mineworkers are no longer going on a sympathy strike:

The National Union of Mineworkers (NUM) will not join Wednesday's general strike because employers need to be given 10 days' advance notice.

The union's 280 000 members would instead hold demonstrations and pickets when not on duty in support of public servants' wage demands, said the union's general secretary Frans Baleni.

"We're also struggling to get some of the addresses for contractors so we can issue notice," said Baleni.

Baleni said earlier that the NUM, with over 280 000 members in the mining, construction and energy sectors, fully supported the public-service unions' demand for a 12% pay hike.
Really?!? Or would they rather just get paid, and this is the spin?