CIM Journal Vol.6 No.4

CIM Journal, Vol. 6, No. 4, 2015
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Sommaire: With growing international interest in mineral resources in Central Africa, the importance of transparency in resource development cannot be overemphasized. Without transparency, the region cannot maximize revenues from resources. Although the importance of transparency is beginning to be recognized, many factors can hold back the gains of transparency from resulting in real economic development for the countries involved. This paper reviews current financial, economic, and development...
Publication: CIM Journal
Auteur(s): C. Nwapi, A. Ingelson
Mots clés: Central Africa, Mineral development, Subnational transparency, Transparency
Numéro: 4
Volume: 6
Année: 2015
Texte
Sommaire: Vale has been actively evaluating new technologies to curtail diesel emissions. This paper discusses the selection, installation, operation, and evaluation of the MANN+HUMMEL SMF®-AR diesel particulate filter system to reduce diesel particulate matter emissions in underground mines. The system uses a sintered metal filter element, an iron fuel-borne catalyst with an onboard dosing system, an electric heater that uses onboard power, and a sensor-based control unit. More than 6,000 h of testing...
Publication: CIM Journal
Auteur(s): J. S. Stachulak, C. Allen, V. Hensel
Mots clés: Diesel emissions, Diesel particulate filter (DPF), Diesel particulate matter (DPM), Underground mines
Numéro: 4
Volume: 6
Année: 2015
Texte
Sommaire: This paper presents the mixed spectral behaviour of iron ores from deposits in Gua, India. Spectral signatures of powder samples and their two-component mixtures were generated by spectro - radiometry. Spectra were divided into continuum and absorption components. A modified Gaussian model was used to extract subtle features from the absorption components of the spectra. A linear unmixing model (LUM) applied to estimate minerals from the spectra of mixed powder samples indicated that this...
Publication: CIM Journal
Auteur(s): S. Patteti, B. Samanta, and D. Chakravarty; D. Dutta
Mots clés: Abundance estimation, Hyperspectral, Iron ore, Linear mixing model (LMM), Linear unmixing model (LUM), Modified Gaussian model (MGM)
Numéro: 4
Volume: 6
Année: 2015
Texte
Sommaire: Conciliation between expansion of the mining industry and sustainable development requirements represents a great challenge. With regards to the various controversies touching this industry, the last decade was marked by a great mobilisation phase of all stakeholders. However, there are still many shortcomings regarding operationalization of the sustainable development concept. This challenge involves shared responsibility between the stakeholders. It requires strengthening government...
Publication: CIM Journal
Auteur(s): N. Bensalah, D. Ferrand, et C. Villeneuve
Mots clés: Adaptation, Climate change, Controversy, Corporate social responsibility, Environment, Ethics, Mines, Stakeholders, Sustainable development
Numéro: 4
Volume: 6
Année: 2015
Texte
Sommaire: In an environment of rising energy prices and mining at greater depths, cost-efficient loading and hauling equipment is essential. Conducted at an underground mining operation, this study analyzes the energy consumption and gas emissions of diesel and electric load-haul-dump machines (LHDs) with similar bucket capacities. Based on energy prices from the first quarter of 2014, results of discrete event simulation show that energy costs for diesel and electric LHDs are US$0.24/t and US$0.07/t,...
Publication: CIM Journal
Auteur(s): A. Salama, J. Greberg, B. Skawina, and A. Gustafson
Mots clés: Discrete event simulation, Energy consumption, Gas emissions, Loading systems
Numéro: 4
Volume: 6
Année: 2015
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