Brown, Andrew2016-12-122016-12-122016-12-12http://hdl.handle.net/10539/21515A project report submltted to the Faculty of Engineering, University of the Witwatersrand, in the fulfillment of the requirements for the degree of Master of Science in Engineering. Johannesburg, 1995The purpose of this project is to analyse the problems encountered when converting from a mix of trackless mechanised mining methods, which at one time produced up to 80 percent of tons mined, to a more convetional type society aspect, the cost of converting back to conventional, ( Abbreviation of abstract)enThesis