Amelia Soares, a spokeswoman for Harmony Gold, the world's fifth biggest gold producer, told Al Jazeera the workers at the Elandsrand mine in South Africa's Mpumulanga province, near Johannesburg were trapped after an electrical cable of a lift carrying workers to the surface snapped on Wednesday.
But Seshoka told Al Jazeera a water pipe had burst and probably caused the lift shaft to collapse.
Seshoka said: "It's a terrible situation. The only exit is blocked, probably by a fall of ground."
He added: "There is no contact at the moment. That is our greatest worry."
He said the miners were trapped in a cramped space where temperatures could reach 30 to 40 degrees Celsius.