JOHANNESBURG — Hundreds of illegal gold miners remained stuck underground Friday at an unused mine in South Africa that police have surrounded. South African authorities are refusing to allow supplies down to the miners, who they say are criminals. Police initially thought some 4,000 illegal miners were underground at the closed Stilfontein mine, about 150 kilometers from Johannesburg. They’ve revised the figure to several hundred but are still denying them food and water as part of “Operation Vala Umgodi” or “close the hole.” Police say they are trying to force the miners — believed to have been underground for several