نتایج جستجو برای: artisanal gold mine
تعداد نتایج: 107584 فیلتر نتایج به سال:
Introduction During 1986 the Gold Division of Anglo American Corporation investigated the use of interactive graphics systems for use in the day-to-day operations and management of its gold mines. With the assistance of Intergra~h South Africa, whose system was finally selected, the Gold Division has begun a major programme of implementation and customisation which is showing signs of becoming ...
Background: The enormous numbers of people involved in artisanal gold mining (AGM) together with primitive methods being used in processing gold have resulted in health and environmental challenges. Based on this, both the local and international stakeholders in mining and health sectors engaged in therapeutic practice to mitigate the challenges. Methods: Physical observation and soil samples ...
Mining is one of the major causes of elevation of naturally-occurring radionuclide material (NORM) concentrations on the Earth's surface. The aim of this study was to evaluate the human risk associated with exposure to NORMs in soils from mine tailings around a gold mine. A broad-energy germanium detector was used to measure activity concentrations of these NORMs in 66 soil samples (56 from fiv...
BACKGROUND In 2010, Médecins Sans Frontières discovered a lead poisoning outbreak linked to artisanal gold processing in northwestern Nigeria. The outbreak has killed approximately 400 young children and affected thousands more. OBJECTIVES Our aim was to undertake an interdisciplinary geological- and health-science assessment to clarify lead sources and exposure pathways, identify additional ...
چکیده ندارد.
Gold mines in the Yellowknife, NT, region--in particular, the Giant Mine--operated from 1949-99, releasing 237,000 tonnes of waste arsenic trioxide (As2O3) dust, among other compounds, from gold ore extraction and roasting processes. For the first time, we show the geospatial distribution of roaster-derived emissions of several chemical species beyond the mine property on otherwise undisturbed ...
A new multistage stochastic mine production scheduling approach is developed and tested in a large operating gold mine. The approach takes short scale orebody information in the form of grade control data into account. As simulated orebodies used in stochastic long term mine planning are based on sparse exploration data while grade control data are unavailable at the time of production scheduli...
The repurposing of gold (Au) mine tailings from artisanal and small-scale mining (ASGM) operations via alkali activation technology is a promising strategy for waste reduction in developing countries. Direct tailings, however, challenging because these materials contain relatively low aluminum (Al)-bearing minerals. In this study, palm oil fuel ash (POFA) was elucidated as high Al-bearing deriv...
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