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Madagascar welcomed back
By Schwartz M.
Madagascar's democratic election has led to a return to its position as a preferred trade partner with the USA and a priority market with Canada. Michael Schwartz takes a look at two key mining projec
Feb 1, 2015
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Rare earths - What is the answer to China's monopoly?
By Schwartz M.
The current status of the heavy and light rare-earth elements outside China is reviewed. New suppliers of the light rare-earth elements are Lynas (Australia/Malaysia) and Molycorp (USA), which are ant
Feb 1, 2015
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Constructability Challenges for Perimeter Control Blasting and Slope Development in Shale and Other “Weak” Rocks
By D. J. Scarpato
"Slope construction in shale can present some interesting challenges for geotechnical design engineers and contractors alike. There are challenges that can be expected and designed-for; however, all t
Jan 1, 2015
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Spontaneous Combustion Charateristics of Multiple Oxidated Non-Caking Coal
By Z. Yanni, W. Xuan, Z. Jingyu, D. Jun
"In order to conserve the coal resources, many coal mines which have been mined begin to re-mine. Re-mining face is of complicated circumstances and coal spontaneous combustion is unknown, so experime
Jan 1, 2015
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A Proposed Approach for Modelling Competitiveness of New Surface Coal Mines
By J. W. Joubert, R. C. W. Webber-Youngman, M. D. Budeba
"SynopsisCost estimation for surface coal mines is a critical practice that affects both profitability and competitiveness. New mines require these costs to be estimated using available information be
Jan 1, 2015
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Large Underground Excavation Support for Ore Exploitation
By R. Lapcevic, P. Lokin
"Among other components, ore body „T“ was discovered in the Bor pit copper mine at a depth of app. 500m. The ore body is relatively small: 60-65m long, 40-45m wide and up to 50m high, but with an extr
Jan 1, 2015
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Role of Applied Potentials on Bioleaching of Chalcopyrite Concentrate and Growth of Acidithiobacillus Ferrooxidans
By K. A. Natarajan, Abha Kumari
"The effect of applied DC potentials on the bioleaching of a chalcopyrite concentrate in the presence of Acidithiobacillus ferrooxidans is discussed. Copper dissolution was the highest at an applied p
Jan 1, 2015
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Cement Deep Soil Mixed Walls/Grout Plug for Groundwater Cut Off and Excavation Support at the Bart Warm Springs Extension
By Harry Schnabel, Mitchell L. Fong, Douglas R. Jenevein, Thomas S. Lee
"The Warm Springs Extension (WSX) is one of a series of projects that will eventually extend the Bay Area Rapid Transit System (BART) from Fremont to San Jose, California. A cut and cover tunnel was u
Jan 1, 2015
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Experimental and Numerical Studies on Flow Characterstics in Rock Fracture Intersections Considering Influence of Intersecting Angle
By Y. Jiang, B. Li, R. Liu
"In this study, laboratory flow tests were conducted on 2-D artificial rock fracture network models containing a single intersection constituted by two inlet and two outlet branches. Three models with
Jan 1, 2015
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Numerical Analysis of Progressive Failure of DM Columns beneath Embankment on Soft Ground
By Zhou Haizuo, Diao Yu, Zheng Gang
"The conventional design method for the embankment supported by DM columns usually assumes the simultaneous failure of all the columns. However, the progressive failure may occur in practice, especial
Jan 1, 2015
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Plant Layout and Logistics
By Jeffrey T. McGinty, Frank M. Wheeler
Plant layout is the arrangement of equipment, process areas, departments, infrastructure, and support facilities. Plant logistics is the flow of parts, people, resources, and information throughout th
Jan 1, 2015
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Reliability analysis of hydraulic shovels
By E. Siami-Irdemoosa, S. R. Dindarloo
"Pareto analysis was used to investigate the failures database of a Hitachi EX1900 hydraulic shovel over one year of continuous operation. The hydraulic system and hydraulic links, hoses and piping we
Jan 1, 2015
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The Fixation of CO2 in Carbonates: Application for Iron- and Steelmaking
By Ron Zevenhoven
In Finland one opportunity for large-scale CO2 capture, utilisation and storage (CCUS) is CO2 mineralisation, i.e. mineral carbonation. A process route under development towards industrial application
Jan 1, 2015
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Synthesis and Sintering of Titanium Aluminide (Ti-48Al) Powder
By Hung-wei Liu, Kevin Plucknett
Early attempts to manufacture titanium aluminides using blended elemental powders, through powder metallurgical processes, have been obstructed due to serious swelling during sintering. Although the u
Jan 1, 2015
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Axial Performance of a Modified Fully Grouted Cable Bolt Tested with a New Laboratory Short Encapsulation Pull Test
By Paul C. Hagan, Jianhang Chen, Serkan Saydam
"Modified cable bolts are commonly used in underground mines due to their superior performance in preventing bed separation when compared with plain strands. To better test the axial performance of a
Jan 1, 2015
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Investigation into Strata Behaviour and Fractured Zone Height in a High-Seam Longwall Coal Mine
By G. Song, S. Yang
"SynopsisThe development of techniques and equipment for single-pass high-seam longwall mining in China is reviewed. Some methods used to obtain the fractured zone height are discussed. The boundary b
Jan 1, 2015
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A new preparation scheme for a difficult-to-float coking coal by column flotation following grinding
By Yijun Caoa, Xiuxiang Taoc, Zhongbo Hub, Yinfei Liaoa
A new preparation scheme for a difficult-to-float coking coal from the Kailuan Mine, Tangshan, China was investigated. The results showed that grinding followed by column flotation was beneficial for
Jan 1, 2015
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Value-in-use model for chlorination of titania feedstocks (0e024aa2-1bbf-4aa3-a06b-c832965b74fa)
By J. H. Zietsman, S. Maharajh, J. Muller
In the chlorination process for TiO2 pigment production, blends of titania feedstocks such as ilmenite, synthetic rutile (SR), natural rutile, upgraded slag, and chloride-grade slag are reacted with c
Jan 1, 2015
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Using the Superposition of Seed Waveforms to Predict Seismic Effect by Blasting
By Yang Jun, Qu Mei, Zheng Yao-wu, Chi Li-yuan
Due to the necessity of the prediction of blasting seismic effect around strip mine bench blasting area, the paper provides a method to predict the blasting seismic effect by employing the superpositi
Jan 1, 2015
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Distribution of Tensile Stress under Modified Boundary Condition in Theoretical Solution for the Diametrical Compression Test
By T. Tsutsumi, S. Kukino
"During the diametrical compression test, the tensile stress generated near the loading plate is influenced by the contact area between the loading plates and specimen. However, very few studies have
Jan 1, 2015