Geomech Consulting (Pty) Ltd2024-05-082024-05-082020https://sahris.sahra.org.za/sites/default/files/additionaldocs/D3%20-Subsidence%20Investigation%20Report.pdfhttp://lhg.cput.ac.za//handle/123456789/314A rock engineering investigation has been conducted to assess the risks of surface subsidence and sinkhole formation in the Elandsfontein Colliery mining area as a result of the existing underground mine workings on the No. 1 Seam. Underground mining has been conducted extensively at Elandsfontein to date, however, there remain significant No. 1 Seam reserve areas which may be exploited either via underground or opencast mining methods in future. The No. 1 Seam is typically overlain by the No. 2 Seam which, to date, has only be exploited via opencast mining methods due to its relatively shallow depth across the mining area as well as the weak nature of the Shale layer which typically forms the immediate roof on the No. 2 Seam. This report serves to document the findings of the subsidence investigation report.enGeologyMines and mineral resourcesElandsfontein (South Africa)Geotechnical engineeringMining engineeringUnderground constructionCoal mines and miningGround control (Mining)Rock mechanicsMine subsidencesTechnical Report