Ngwenyama, Philani Larrance; De Graaf, Wolter Willem; Preis, Eugene Pieter(Southern African Institute of Mining and Metallurgy, 2017-03)
The depletion of coal reserves in the Witbank coalfield in Mpumalanga
Province has resulted in mining companies exploring the possibilities of
extracting coal pillars. These are pillars that were left behind for
hangingwall ...
Ngwenyama, Philani Larrance; De Graaf, Wolter Willem(Southern African Institute of Mining and Metallurgy, 2021-12)
South Africa is one of the leading producers and exporters of coal globally. A significant amount of the
country’s production is obtained from previously mined underground bord and pillar workings. This
coal is in the ...
