Dumka, Mychajlo2015-03-102015-03-102015-03-10http://hdl.handle.net/10539/17212A comprehensive study was undertaken to minimize the Technical Environmental risks in extending the current BuffeUfontein Infrastructure, an additional 1 000 metres in depth, to a mean! rock breaking depth of 3 740 m below surface. A systematic approach was adopted in determining the environmental requirements, methods of ventilation and implications of physical limitations. Maximum re-use of existing ventilation Infrastructure and refrigeration machinery was pre-requisite. The determination of air reticulation capacities and chilling equipment operational limitations paramount.enThesis