The relationship between PM.sub.2.5 concentration and typical metal elements around a uranium deposit in eastern China was analyzed. The correlation between PM.sub.2.5 concentration and metal content ...in PM.sub.2.5 is generally poor, while the correlation between metal elements is generally good. The analysis shows that PM.sub.2.5 concentration and U content show the same trend with seasonal replacement, and Th content has a positive correlation with PM.sub.2.5 concentration on the whole. PM.sub.2.5 concentration was positively correlated with the content of Pb, Cd and Al. There is no obvious relationship between PM.sub.2.5 concentration and Ti content, and other theoretical explanations need to be studied.
We combine georeferenced data on mining extraction of 14 minerals with information on conflict events at spatial resolution of 0.5° × 0.5° for all of Africa between 1997 and 2010. Exploiting ...exogenous variations in world prices, we find a positive impact of mining on conflict at the local level. Quantitatively, our estimates suggest that the historical rise in mineral prices (commodity super-cycle) might explain up to one-fourth of the average level of violence across African countries over the period. We then document how a fighting group's control of a mining area contributes to escalation from local to global violence. Finally, we analyze the impact of corporate practices and transparency initiatives in the mining industry.
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The aim of this paper is to describe a new discrete method for the evaluation of local damage to the bearing system of underground structures. The discrete boundary element method, which serves as a ...numerical means for detecting local cracks, has been used in the past either as a general means for identifying sites with cracks or for assessing the possibility of bumps occurring in underground mines. Newly, this method is non-trivially extended to the combination with non-linear Navier-Stokes equations, which are solved by finite volumes used to describe the propagation of air movement that creates a subsonic pressure wave in the free space within the structure. Interaction of waves along the boundary of both phases is ensured by interfacial conditions, which correspond to the combination of both numerical means - discontinuous boundary elements and finite volumes. To maintain compatibility of both environments, discretization of both air and solid is based on hexagonal meshes. Two typical examples demonstrate the suitability of the method showing an initial (critical) state of the development of pressure waves and the condition of damage to the structures of underground parking.
El depósito de relave minero abandonado, ubicado en la localidad de Collpa del distrito de Santa Bárbara de Carhuacayán, provincia de Yauli, departamento de Junín, genera una contaminación ambiental ...grave a este poblado; sobre todo afecta a la cuenca alta del río Mantaro; esta es la razón por la cual se estudió este material para su posible uso como aditivo estabilizante de un tipo de suelo: ML (limo inorgánico), para la cimentación de construcciones. Los procedimientos fueron ensayos de laboratorio como ensayos granulométricos, límites de Atterberg, proctor estándar, de gravedad específica de los suelos, de corte directo y para finalizar se analizó la carga portante admisible de cada muestra analizada (qadm). Estas muestras están constituidas por el suelo ML con la combinación del relave minero en proporciones porcentuales de 0%, 20%, 30% y 50%, con respecto al peso total de cada muestra. Los resultados del proyecto, al analizar y calcular los datos obtenidos de los ensayos de laboratorio, fueron: 5kg/cm2, 4.67kg/cm2, 5.84kg/cm2 y 7.57kg/cm2, que son los qadm de cada muestra con la proporción de relave en forma ascendente, respectivamente. En conclusión, el relave minero estudiado aumenta las características mecánicas del suelo ML, estabilizándolo con respecto a su estado base.
Sustainability science has grown as a field of inquiry, but has said little about the role of large-scale private sector actors in socio-ecological systems change. However, the shaping of global ...trends and transitions depends greatly on the private sector and its development impact. Market-based and command-and-control policy instruments have, along with corporate citizenship, been the predominant means for bringing sustainable development priorities into private sector decision-making. This research identifies conflict as a further means through which environmental and social risks are translated into business costs and decision making. Through in-depth interviews with finance, legal, and sustainability professionals in the extractive industries, and empirical case analysis of 50 projects worldwide, this research reports on the financial value at stake when conflict erupts with local communities. Over the past decade, high commodity prices have fueled the expansion of mining and hydrocarbon extraction. These developments profoundly transform environments, communities, and economies, and frequently generate social conflict. Our analysis shows that mining and hydrocarbon companies fail to factor in the full scale of the costs of conflict. For example, as a result of conflict, a major, world-class mining project with capital expenditure of between US$3 and US$5 billion was reported to suffer roughly US$20 million per week of delayed production in net present value terms. Clear analysis of the costs of conflict provides sustainability professionals with a strengthened basis to influence corporate decision making, particularly when linked to corporate values. Perverse outcomes of overemphasizing a cost analysis are also discussed.
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Effect of mining on the EPT Rivera-Pérez, Juan Mateo; Shimano, Yulie; Luiza-Andrade, Ana ...
Hydrobiologia,
02/2023, Volume:
850, Issue:
3
Journal Article
Peer reviewed
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
•The Australian state intervenes in the Australian mining industry in the Philippines.•States engage with commodity chains at various points outside their territory.•The ‘home’ state of a mining ...company contributes to inequalities in commodity chains.•Juniors and mid-size companies are increasingly important in the mining industry.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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