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of 91
pro vyhledávání: '"B.P. Watson"'
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy. 121:1-12
The Upper Group 2 (UG2) chromitite reef is a shallow-dipping stratiform tabular orebody in the South African Bushveld Complex, which strikes for hundreds of kilometres. Mining is extensive, with depths ranging from close-to-surface to 2 500 m. Pillar
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy. 121:1-8
The research described in this paper was done to confirm the Upper Group 2 (UG2) PlatMine peak pillar strength formula (Watson et al., 2007), which was determined from a back-analysis of failed and unfailed pillars. Underground measurements were made
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy, Volume: 121, Issue: 1, Pages: 47-55, Published: JAN 2021
SYNOPSIS Potholes on the Merensky and UG2 reefs in the Bushveld Complex occur as near-circular to elliptical depressions or slumps on the reef horizon, normally presenting as severe disruptions which prevent economic extraction. Within the pothole, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1c6383bbae908d65635ff142e704565
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532021000100008&lng=en&tlng=en
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532021000100008&lng=en&tlng=en
Autor:
Yasuo Yabe, B.P. Watson, H. Ogasawara, Takatoshi Ito, Kosuke Sugimura, Siyadnda Mngadi, Makoto Kanematu, Shunsuke Yoshida, Ryogo Tadokoro, Musa Manzi, Mitsuya Higashi, Martine Ziegler, Akio Funato, Bennie Liebenberg, Raymond Durrheim
The 2014 Orkney earthquake (M5.5) occurred below the Moab Khotsong gold mine in South Africa. The shallowest aftershocks were located only several hundred meters below the deepest level of the mine. Two boreholes (Holes A (817 m) and B (700 m)) were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03004962eba64205da913a629c552370
https://doi.org/10.5194/egusphere-egu2020-3288
https://doi.org/10.5194/egusphere-egu2020-3288
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy, Volume: 117, Issue: 12, Pages: 1139-1144, Published: DEC 2017
There is currently no standard method of evaluating tendon straps and weld mesh for underground excavation support in South Africa. At the request of suppliers, the CSIR has been conducting pure tensile tests on these elements with all the strands cl
Autor:
Takatoshi Ito, Siyanda Mngadi, B.P. Watson, H. Ogasawara, Yasuo Yabe, Kosuke Sugimura, Ryogo Tadokoro, Makoto Kanematsu, Akio Funato, Shuhei Abe, Raymond Durrheim, Akimasa Ishida, Gerhard Hofmann, Mitsuya Higashi, Lourens Scheepers, Harumi Kato
Publikováno v:
Proceedings of the Ninth International Conference on Deep and High Stress Mining.
To demonstrate the possibility of stress measurement at depths of more than 3 km, in-situ stress states were determined around the source faults of three seismic events: a Mw2.2 seismic event at about 3.3 km below surface in Mponeng gold mine, a Mw3.
Autor:
R. Gerber, B.P. Watson
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy, Volume: 118, Issue: 5, Pages: 493-504, Published: MAY 2018
The hangingwall of the UG2 Reef is characterized by stratification in the form of thin and weakly cohesive chromitite stringers that can vary in number and height above a stope. These stringers, in conjunction with shallow-dipping thrust faulting, en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a3537228027e8eb00409082015ab3db
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532018000500009&lng=en&tlng=en
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532018000500009&lng=en&tlng=en
Publikováno v:
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. 31:581-596
The influence of an interface on the initiation and propagation of fractures was investigated using the Brazilian tensile test (diametral compression of a disc). Failure in the Brazilian test takes the form of an extension fracture in the loaded diam
Publikováno v:
Proceedings of the First Southern Hemisphere International Rock Mechanics Symposium.
In the laboratory, core obtained from certain platinum mines in the Bushveld Complex in South Africa showed a strong nonlinear relationship between applied load and induced deformation. This nonlinear behaviour invalidates assumptions that are typica
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