In order to gain a knowledge of the heat emitted from a variety of sources at the blind heading of an underground gold mine, the present study conducts an in situ measurement study in a blind heading …
At greater depth, heat inside underground mines increases due to geothermal gradient, heat released from high-capacity machinery, exposed rock surface, auto-compression of air, human metabolism, etc. Prolonged physical work in thermal environments severely affects the health, safety and efficiency of miners.
The findings showed that gold mining activities had resulted in environmental degradationevidenced by observable effects such as dust at crusher location sites, coloration in stream water,...
Innovation plays a critical role in the mining industry as a tool to improve the efficiency of its processes, to reduce costs, but also to meet the increasing social and environmental concerns among communities and authorities.
Abstract. Mining poses serious and highly specific threats to biodiversity. However, mining can also be a means for financing alternative livelihood paths that, over the long-term, may prevent biodiversity loss. …
Gold veins show features relating to erratic grade distribution (nugget effect), and variable geometry and internal architecture. These features include variations in dip, strike and width,...
Gold veins show features relating to erratic grade distribution (nugget effect), and variable geometry and internal architecture. These features include variations in dip, strike and width, late-stage faulting/shearing effects and vein continuity and type.
The long-term effects of underground mining (EM) on the herb, shrub, and tree communities in the Nanjiao mining area, China, from 1987 to 2017 were evaluated. The …
Respirable dust, diesel particulate matter, crystalline silica and noise pollution are the most common causes of health issues experienced by underground mine workers. Assessment of exposure levels in relation to standard regulatory body permissible levels is essential for the safety of mine workers. Objectives.
Manzi et al. show that 3D seismics can now be used to mitigate the risks to mine workers posed by water inrushes and the ignition of flammable gases in deep underground gold mines of Witwatersrand Basin, South Africa.
Health problems of gold miners who worked underground include decreased life expectancy; increased frequency of cancer of the trachea, bronchus, lung, stomach, and liver; increased frequency of pulmonary tuberculosis (PTB), silicosis, and pleural diseases; increased frequency of insect-borne diseases, such as malaria and dengue fever; noise …
This research recognizes the potential use of bioassays to evaluate the toxic effects generated by chemical wastes produced by gold mining and discharged into surface waters.
To address this gap, we aimed to explore (i) community member's perception of the mechanisms through which their health has been affected by mining projects and (ii) to identify the implications of different extraction projects for health and well-being in Burkina Faso, Mozambique and Tanzania.
Mining affects biodiversity at multiple spatial scales (site, landscape, regional and global) through direct (i.e. mineral extraction) and indirect processes (via industries supporting mining operations, and …
Manzi et al. show that 3D seismics can now be used to mitigate the risks to mine workers posed by water inrushes and the ignition of flammable gases in deep underground gold mines of Witwatersrand Basin, South Africa. Potential conduits that may transport water and methane to underground workings are successfully mapped using edge detection ...
Gold veins show features relating to erratic grade distribution (nugget effect), and variable geometry and internal architecture. These features include variations in dip, strike and width, late-stage faulting/shearing effects and vein continuity and type.
A Stochastic Mixed Integer Programming Framework for Underground Mining Production Scheduling Optimization Considering Grade Uncertainty. Abstract: Conventional mine …
Figure 1 shows an example of a buildup and explosion of toxic gases, such as methane (CH 4), nitrogen dioxide (NO 2), and hydrogen sulphide (H 2 S) in an underground mine. The inhalation of an overlooked black damp in mines, which is a mixture of dust, carbon dioxide, and nitrogen [], gradually overcomes and destroys the …
Dear Colleagues, Sampling is a critical component throughout the entire mine value chain. It includes sampling of both in situ and broken material for exploration, resource, and grade control and geoenvironmental, metallurgical and geometallurgical purposes; sampling is also a critical success factor in the analytical laboratory.
Current trends and future of the mining industry. It will contribute to improve the understanding of the dynamics and mechanisms involved in the innovation …
The underground gold mines of South Africa offer a unique historical setting to study heat acclimation. The early heat stress research was conducted and described by a young medical officer, Dr. Aldo Dreosti.
While underground mining initially disturbs only a small portion of the surface above a mined area, long-term effects from ground subsidence can be more severe and widespread than the effects from modern strip mining and reclamation.
To the best of our literary search, the effects of D-MIMO on underground mine mm-waves wireless channel including NLOS-MSE have not been reported yet. Thus, purpose of this experimental investigation is twofold; first, to present an experimental study that reveals the priority of D-MIMO over D-SISO systems for mm-waves wireless …
The Karari underground gold mine has been used as a case study. The rock mass structure was characterised as jointed/blocky/bedded class and ground behaviour types identified for evaluation were 'intact rock failure', 'structural failure' and 'water effect'.
Pongkor's Mine Character Pongkor is the largest underground gold mining operations in Java and has a diverse underground mining method which owned By PT Antam, an Indonesian State Owned Mining Company. It lies at Mount Halimun National Park, about 90km from Jakarta, it covers a surface area of approximately 6.047 Ha.
The mining depths of Savuka and Tautona are more than 3700 m, the West Deep gold mine of Anglo Gold Co., Ltd., has a depth of 3700 m, the ore body of West Driefontein gold mine occurs in the underground of 600 m and extends to below 6000 m. At present, the deepest South Deep Level gold mine has a mining depth of 3500 m.
In order to gain a knowledge of the heat emitted from a variety of sources at the blind heading of an underground gold mine, the present study conducts an in situ measurement study in a blind heading within the load haul dumps (LHDs) that are operating. The measurements can provide a reliable data basis for the setting of numerical …
Yaramoko Gold Mine is located in the western part of the country, between Ougagadougou (capital) and Bobo-Dioulasso (second largest city). Data was collected in two neighbourhoods of the closest town that were near the mine. The mine is operational since 2016 and extracts the ore from underground. Less than 100 km away from the …
Although this study could not establish a cause-effect relationship between the mining activities and soil properties, the processes involved in the artisanal gold mining, which …
Increasing demand for metals caused by global economic growth and exploitation of shallow mineral deposits forces mineral extraction to go deeper. A direct consequence of this development is an increase in rock pressure-related mining problems. The role of rock engineering in the design and operation of deep mines is discussed in …