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Browsing by Subject "Borehole radar"

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Advances in geophysical technologies for the exploration and safe mining of deep gold ore bodies in the Witwatersrand basin, South Africa

Author: Durrheim, RJ ; Vogt, D ; Manzi, M Date: Aug 2013 Gold is currently mined at depths reaching 4km in the Witwatersrand basin of South Africa. Geophysical techniques have been used to explore for new resources, and to design and operate mines efficiently and safely. The authors report on ... Read more
Application of borehole radar to South Africa’s Ultra-Deep gold mining environment

Author: Trickett, JC ; Stevenson, F ; Vogt, D ; Mason, I ; Hargreaves, J ; Eybers, H ; Fynn, R ; Meyering, M Date: May 2000 Borehole Radar has been identified as the most immediately applicable electromagnetic technique to delineate disruptions to gold reef in the South African Deepmine environment. The economically important Ventersdorp Contact Reef (VCR) has ... Read more
Borehole radar as a tool to optimise mine layouts and production

Author: Mafiri, MT ; Nyareli, T ; Ngwenya, B ; Vogt, D Date: Nov 2008 The major gold and platinum deposits of South Africa occur in the Witwatersrand Basin (gold) and Bushveld Complex (platinum) (Henning et al., 1994; Carr et al., 1994; Cawthorn, 1999). While the origins and geology of the two structures have ... Read more
Borehole radar directionality in the time domain in small aperture antennas

Author: Vogt, DR ; Nyareli, TN Date: Jun 2008 It is difficult to achieve significant directivity in the radial direction of a borehole radar antenna, because the spacing of antenna elements is typically constrained by the borehole diameter to be considerably less than a wavelength. In ... Read more
Borehole radar system for South African gold and platinum mines

Author: Vogt, D Date: Dec 2006 Borehole radar is an electromagnetic tool that can be applied to assist in the delineation of orebody geometry, ideally using routinely drilled cover and exploration boreholes. Successful trials of borehole radar for delineating reef horizons ... Read more
Deep-level Gold and Platinum Mining - The Application of Geophysics in South Africa

Author: Van Schoor, Michael ; Nkosi, Nomqhele Z ; Magweregwede, Fleckson ; Kgarume, Thabang E Date: Aug 2022 This book provides the basic know-how and guidance to effectively exploit non-destructive geophysical technologies and apply them in the underground mining environment to optimise mineral extraction and to contribute to safer mining. The ... Read more
Experimentally achieving borehole antenna radar directivity in the time domain in the presence of strong mutual coupling

Author: Vogt, D ; Nyareli, T Date: Jun 2008 It is difficult to achieve significant directivity in the radial direction of a borehole radar antenna, because the spacing of antenna elements is typically constrained by the borehole diameter to be considerably less than a wavelength. ... Read more

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Browsing by Subject "Borehole radar"

Browsing by Subject "Borehole radar"

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