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Keywords: pillar extraction
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Proceedings Papers

Paper presented at the ISRM AfriRock - Rock Mechanics for Africa, October 3–5, 2017
Paper Number: ISRM-AFRIROCK-2017-036
... Mining in the Carletonville area of the Witwatersrand Basin predates 1934. Owing to the depletion of higher grade ore, the current activities focus increasingly on the extraction of lower grade secondary reefs as well as remnant and pillar extraction. Of particular interest is multi-reef remnant...
Proceedings Papers

Paper presented at the ISRM AfriRock - Rock Mechanics for Africa, October 3–5, 2017
Paper Number: ISRM-AFRIROCK-2017-078
... suggested that the project would indeed be a viable way to increase the total potential revenue. This necessitated a study on the stability of the underground excavations during the pillar extraction process based on a conceptual design. The proposed mining layout and extraction sequence was simulated...
Proceedings Papers

Paper presented at the ISRM AfriRock - Rock Mechanics for Africa, October 3–5, 2017
Paper Number: ISRM-AFRIROCK-2017-079
... on the No. 4 Seam will have a typical extraction ratio of approximately 60%. With the partial pillar extraction (stooping process), the overall extraction ratio would typically increase to approximately 75%, which makes it economically viable provided that it can be carried out safely. A numerical model...

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