revenues, 32 percent vs. 38 percent. Hugh Cameron, PWC's executive who focuses on mining in Africa, however was quick to point out this by no means implied that things were about to turn bad for the mining sector, as dropping margins from 28 percent to 23 percent hardly signalled ...
Seismic waves emitted during fracturing were monitored using a dense state-of-the-art network of high sensitivity acoustic emission sensors near the mining area.26 Most deep level gold mines in South Africa have in-mine seismic monitoring systems that record seismicity down to Mw −1. However,...
Gold mines in South Africa use large volumes of water for cooling and other purposes underground. The mines are often at great depths, for example 3600 metres below surface level. Water piped down the shaft can therefore be at high pressures unless a system of pressure reducing dams or valves...
The South African gold mining sector remains a significant contributor to the country’s economy. Facing several challenges that hinder the realisation of South Africa’s full mineral potential, the sector’s sustainability and profitability can be enhanced through implementing operational improvement measur...
Time-dependent behaviour of hard rock in deep level gold mines In deep level hard rock mining the rheological behaviour of the rock is important as time-dependent aseismic processes can lead to a stable dissipation of energy thus reducing violent outbursts. Underground closure measurements, observat...
Fill support systems for deep level gold mines : Patchet, S J J S Afr Inst Min Metall, V78, N2, Sept 1977, P34–46 - 《International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts》 被引量: 0发表: 1978年 Sample variance in photometric redshift calibration: ...
F. Malan CSIR Mining Technology, Johannesburg, South Africa Summary Although hard rock is not usually associated with large creep deformation, signi?cant time-dependent behaviour is observed in the tabular excavations of the South African gold mines. Time-dependent closure data was collected in ...
aCARLETONVILLE, South Africa (AP) -- Singing and dancing despite exhaustion, the last of 3,200 miners trapped deep underground for more than a day emerged safely Thursday night, delivering a happy ending but raising questions about the safety of South Africa's important gold mines CARLETONVILLE,...
mining-discovery-with-deep-learning -> Mining and Tailings Dam Detection in Satellite Imagery Using Deep Learning e-Farmerce-platform -> classify crop type sentinel2-deep-learning -> Novel Training Methodologies for Land Classification of Sentinel-2 Imagery RSSC-transfer -> The Role of Pre-...
Mining has been ongoing in the region since the late 1800s [1]. Easily exploitable near-surface deposits were mined first; however, as these shallow deposits were exhausted, mining has progressed to significant depths. Many mines currently in operation in the Sudbury Basin are at depths greater...