Harmony Gold Mining Co., Africa's third-largest gold producer, said 3,200 workers are stuck more than a mile underground at its Elandsrand mine in South Africa after a falling pipe damaged the shaft... South African companies, including Harmony and Gold Fields Ltd., are digging deeper shafts to tap the Witwatersrand Basin... The mines are the world's deepest and among the most dangerous, with 113 workers killed last year... [also refers to AngloGold Ashanti]