June/July 2016

CIM Journal and CMQ

Excerpts taken from abstracts in CIM Journal, Vol. 7, No. 2.
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Preliminary investigation of rockmass response to undercut blasting in a block cave mining system using VRSV

J. D. Tibbett, F. T. Suorineni, and B. K. Hebblewhite, University of New South Wales, Kensington, Australia

ABSTRACT Block caving is the preferred underground mining method to profitably extract massive, low-grade orebodies; however, lack of cave access inhibits understanding the rockmass response to mining, which is needed for safer, more productive operations. Combining large datasets from multiple sources with virtual reality scientific visualization (VRSV) is an alternative method for understanding complex cave behaviour, by providing virtual access to the cave. A customized VRSV module was developed at UNSW Australia to investigate rockmass response to undercut developments at a case-study block caving operation. Time/sequence effects are investigated in rockmass response to blasting, which is an important factor in hard-rock mines.


Inverse slope method for interpreting vertical electrical soundings in sedimentary phosphatic environments in the Al-Sharquieh mine, Syria

J. Asfahani, Geology Department, Atomic Energy Commission, Damascus, Syria

ABSTRACT The inverse slope method (ISM) was applied to reinterpret vertical electrical soundings (VES) data from pits at the Al-Sharquieh phosphate mine, in order to demonstrate applicability and suitability of the ISM for interpreting VES data from sedimentary phosphatic environments. The ISM overcomes limitations of the curve matching method and the complexity of lithological sections. The ISM geo-electrical interpretation results correlated well with lithologies of the pits. This method characterized resistivity and thickness of the phosphatic layer, and identified favourable phosphate-prospecting areas using the newly developed thickness/depth parameter. The ISM is recommended for interpreting VES measurements in similar sedimentary phosphatic regions.


Relative-value, discrimination-factor, and vector-ratio method for defining anomalies in geochemical data

C. I. Godwin, Department of Earth, Ocean and Atmospheric Sciences, The University of British Columbia, Vancouver, British Columbia, Canada and Godwin Consultants Ltd., Port Moody, British Columbia, Canada

ABSTRACT The relative-value (R-value), discrimination-factor (D-factor), and vector-ratio (V-ratio) method (RDVM) provides a geological knowledge-based statistical and geological-genetic interpretation scheme for geochemical data that enhances discovery in geochemical exploration. The practical advantage of RDVM is that it synthesizes geochemical features geologically related to ore-deposit discovery in three steps: reclassifying element concentrations using log-probability plots into R-values; calculating geologically defined D-factors from R-values; and determining V-ratios. D-factors are the sum of R-values, divided by the number of R-values summed. Based on the analyses selected, D-factors mimic rock or mineral deposit signatures. V-ratios refine interpretations of rock type and vector to orebody locations.


A laboratory protocol to evaluate potential chemical interferences in flotation circuit applications

B. G. Cousins, B. O’Rourke, Formerly of Ashland Water Technologies, Mississauga, Ontario, Canada; and C. Spence, Formerly of Hudbay Minerals, Flin Flon, Manitoba, Canada

ABSTRACT Some non-flotation chemicals are added to flotation circuits directly and indirectly to control issues such as scaling and dust in other areas of the operations. Since dosage levels are generally not high, a standard laboratory float test may not be able to determine the effect of a specific chemical on the productivity of the flotation circuit. This paper presents a laboratory testing protocol that uses kinetic float studies to test the effect of normal to extreme doses of antiscalant and dust chemistries (5–100 g/t). Results indicate that this protocol helps to predict potential interference by a particular chemistry on the flotation circuit.


Canadian Metallurgical Quarterly cover
Excerpts taken from abstracts in CMQ, Vol. 54, No. 2.
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Influence of thermal diffusion on decarburisation of iron–chromium alloy droplets by oxygen–argon gas mixtures
P. Wu, Y.D. Yang, M. Barati, and A. McLean, Department of Materials Science and Engineering, University of Toronto, Toronto, Ontario, Canada

Effects of Al2O3, CaO and Cr2O3 on liquidus temperatures of Fe–Mg–Si–O slags
A. Ilyushechkin, CSIRO Energy Technology, Kenmore, QLD, Australia; P.C. Hayes and E. Jak, Pyrosearch, School of Chemical Engineering, TheUniversity of Queensland, Brisbane, Queensland, Australia

Manufacturing of copper foams through accumulative roll bonding (ARB) process: structure and damping capacity behavior
M. Asadi Zeidabady, M. Tajally, and E. Emadoddin, Faculty of Materials Engineering and Metallurgy, Semnan University, Semnan, Iran

Creep deformation and damage evaluation of service exposed reformer tube
N. Roy, Materials Science and Technology Division, CSIR-National Metallurgical Laboratory, Jamshedpur, India; A. Raj, R.V.S. College of Engineering and Technology, Jamshedpur, India; B. N. Roy, Birsa Institute of Technology, Sindri, India; A. K. Ray, Materials Science and Technology Division, CSIR-National Metallurgical Laboratory, Jamshedpur, India

Combined influence of fluorides and ferric ions on corrosion of titanium and Pd alloyed titanium in 100 g L−1 sulfuric acid solution
P. Laihonen and M. Lindgren, Outotec Research Center, Pori, Finland

Statistical model for gas holdup in flotation column in presence of minerals
K. Bhunia, G. Kundu, and D. Mukherjee, Chemical Engineering Department, Indian Institute of Technology, Kharagpur, India

Solid reaction between Al and B4C
S. Wu, S. Wu, G.

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Retour à la table des matières | Article de  fond : les microbes au service de l’extraction minièreSection technologie | Profil de projet : la mine Renard
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