CIM Journal, Vol. 7, No. 1

CIM Journal, Vol. 7, No. 1, 2016
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Texte
Sommaire: Roof bolts are subjected to axial stresses, shear stresses, or both. Axial and shear stresses were compared between roof bolts machined with two and three slots. Shear stresses perpendicular to and at an angle to the shear planes were evaluated by analyzing a three-slot instrumented roof bolt, performing laboratory tests on two- and three-slot roof bolts, and conducting in-situ test analyses. Three-slot bolts appear to provide a complete bending strain profile, requiring no prior knowledge of...
Publication: CIM Journal
Auteur(s): K. V. Jessu, T. R. Kostecki, and A. J. S. Spearing
Mots clés: Angled double-shear test, Distributed optical sensing (DOS), Double-shear tests, Fibre Bragg grating (FBG)
Numéro: 1
Volume: 7
Année: 2016
Texte
Sommaire: This paper reviews the evolving Ontario mining regime for mining industry-Aboriginal engagement and its apparent alignment with court decisions, domestic law, emerging international norms, mining industry rules, and mining firm-Aboriginal agreements, drawing on publicly available commentary from government officials, the private sector, and Indigenous communities. This paper provides a preliminary analysis of the potential implications of the new regime, especially for the mining industry and...
Publication: CIM Journal
Auteur(s): K. Webb, M. Hohn
Mots clés: Aboriginal communities, Consultation, Ontario Mining Act, Stakeholder engagement
Numéro: 1
Volume: 7
Année: 2016
Texte
Sommaire: This paper studies the characterization and dissolution of a Nigerian pyrolusite ore, reporting the results of ore physicochemical analyses and detailed ore characterization before and after leaching at optimal conditions. Ore dissolution rate increased proportional to acid concentration and temperature, but decreased with ore particle size. In a 4 M H2SO4 solution at 80°C with a particle size of –90+75 μm and moderate agitation, ore dissolution rate reached 78.7%. Unleached residue produced...
Publication: CIM Journal
Auteur(s): A. A. Baba and L. Ibrahim, R. B. Bale, A. G. F. Alabi, F. A. Adekola, M. K. Ghosh, K. Sanjay, and A. R. Sheik
Mots clés: Characterization, Dissolution kinetics, Leaching, Nigeria, Pyrolusite ore, Sulphuric acid solution
Numéro: 1
Volume: 7
Année: 2016
Texte
Sommaire: The development curve in the extractive sector has become longer, steeper, and riskier due to increased social, legal, and political risks from various stakeholders. Indigenous peoples are a unique stakeholder because their growing legal rights to lands and resources can often determine a project’s outcome. A project will only be successful if it is able to obtain the legal permits, withstand any judicial reviews, and gain and maintain the social license to operate. Stakeholder identification...
Publication: CIM Journal
Auteur(s): K. Ramji
Mots clés: Aboriginal title and rights; Corporate and social responsibility (CSR); Extractive sector; Impact benefits agreement (IBA); Indigenous peoples; Management and engagement; Risk management; Social, legal, and political risk (SLP); Social license to operate (SLO); Stakeholder identification; United Nations Declaration on the Rights of Indigenous Peoples (UNDRIP)
Numéro: 1
Volume: 7
Année: 2016
Texte
Sommaire: Most underground diesel equipment is equipped with diesel oxidization catalysts (DOCs) to reduce carbon monoxide and hydrocarbon emissions. DOCs do not alter nitrogen oxides concentrations but can promote the oxidization of nitric oxide (NO) to the more toxic nitrogen dioxide (NO2). Vale and CanmetMINING have been researching how to reduce worker exposure to diesel emissions by testing mining equipment DOCs. Results indicate a > 77% decrease in carbon monoxide concentration but a 46–315%...
Publication: CIM Journal
Auteur(s): J. Stachulak, M. Gangal, C. Allen
Mots clés: Catalytic converter, Diesel emission, Diesel engine, Diesel oxidation catalysts (DOCs), Load haul dump (LHD), Mine air quality, Nitrogen oxides (NOx), Total hydrocarbon concentrations (THC), Underground mines, Ventilation
Numéro: 1
Volume: 7
Année: 2016
Texte
Sommaire: This paper compares Canadian provincial mining safety regulations regarding the use and testing of cage safety catches, including a brief history and evolution. Regulations are similar across provinces, with only slight variations. Currently, the “Ontario-type” safety dog is the most commonly used safety catch in Canada. Performance estimation of the compensation mechanism for different safety-dog shapes and tooth angles show this shape works well and has consistent braking results, but the...
Publication: CIM Journal
Auteur(s): B. Galy and L. Giraud
Mots clés: Cage, Deceleration, Free fall, Hoist, Mining safety, Performance, Regulation, Safety catches, Safety dogs
Numéro: 1
Volume: 7
Année: 2016
Texte
Sommaire: The potential for mudrushes is a potential hazard that should be evaluated during cave mining studies. Mudrushes are a phenomenon that can have very different origins, but produce the same results: injury, loss of life, damage to property, excess dilution, production delays, or mine closure. Although mudrushes are more common in cave mines than other mines, any mining activity that enables the accumulation of fine particles and water is susceptible to mudflow. This paper describes the process...
Publication: CIM Journal
Auteur(s): J. Jakubec, R. Clayton, A. R. Guest
Mots clés: Cave mining, Mudflow, Mudpush, Mudrush, Risk, Wet muck
Numéro: 1
Volume: 7
Année: 2016
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