Author:Mngadi, SB; Durrheim, RJDate:Oct 2013Subsidence and collapse of unmapped shallow coal mine workings poses a risk to the public and hampers the development of valuable property. A high-resolution reflection seismic survey was conducted to determine whether it is possible to map ...Read more
Author:Moodie, BDate:1974A survey of the Maceral composition of the products prepared by the collieries in the Republic was initiated a number of years ago. The first report (Report No. 10 of 1974) dealt with the Maceral composition of the products prepared by the ...Read more
Author:Moodie, B; Kunstmann, FHDate:1963The results of the petrographic analysis and of the laboratory coking tests are discussed in this report.Read more
Author:Madden, BJ; Canbulat, I; Jack, BW; Prohaska, GDDate:Dec 1995The SIMRAC project COL 021A entitled “a reassessment of coal pillar design procedures” set out to achieve a coal pillar design procedure that takes cognisance of different geological and structural factors as well as the influence of the ...Read more
Author:Boshoff, HPDate:1961This report investigates 3 boreholes drilled on the farm Driefontein 70 and Rolfontein 40 in the Amersfoort district and Nooitgedacht 105 in the Ermelo District of Transvaal. Coal cores were used for description and sampling, taken from the ...Read more