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Effects of Chinese Mineral Strategies on the U.S. Minerals Industry
By P. A. Plunkert, D. E. Morse, Pui-Kwan Tse, W. D. Menzie, Lucy McCartan, J. F. Papp
China’s burgeoning economy is responsible for a major share of recent world mineral consumption increases. In addition to factors traditionally recognized in market economies1 and factors unique to s
Jan 1, 2006
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Mining Applications Of Small Disc Cutters
By J. E. Friant
Until 1956, drill and blast was the only way to excavate rock. In that year, a tunneling machine using disc type cutters economically bored a small Toronto tunnel. Its amazing 105 ft/day set a new w
Jan 1, 2002
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Leica Dozer 2000 At The San Miguel Lignite Mine: The Uses Of GPS Grade Control In Surface Mining
By M. Heger
February 2, 1999 marks a milestone in earth-moving technology at the San Miguel Lignite Mine. It was on that date that The North American Coal Corporation (NAC) took delivery of three Leica Dozer 200
Jan 1, 2002
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Silica Dust Sources In Underground Metal/Nonmetal Mines - Two Case Studies (b311d9b0-a7c4-4e80-9fbb-e293d45f1daa)
By R. H. Grau
NIOSH’s Pittsburgh Research Laboratory is currently involved in research to identify silica dust generation in underground metal/nonmetal mines. The ultimate goal of this research is to develop con
Jan 1, 2002
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Leaching And Electrochemical Behavior Of Gold In Iodide Solutions Part I: Dissolution Kinetics
By J. B. Hiskey
Of the halogens, the gold iodide complexes are the most stable in aqueous solutions. A series of experiments were performed to investigate the kinetics and mechanism of the leaching reaction between g
Jan 1, 1990
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Geostatistical Assessment And Quantification Of Uncertainity Of Methane In The Caved And Fractured Zone Of Longwall Mines
By C. Özgen Karacan
The formation of the gas emission zone in longwall mining and the potential amount of gas in this zone are factors of local geology and spatial variability within this geology. Therefore, geostatistic
Jan 1, 2012
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Copper Prices Help Arizona’s Mining Industry
By William R. Yernberg
SME’s Arizona Conference was held at the Doubletree Hotel at Reid Park in Tucson on Dec. 5and 6, 2004. The annual conference is organized by the Arizona Conference Board of Directors, which represent
Jan 1, 2005
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Considerations For Blending Low-Rank and High-Rank Coals – Preprint 97-15
By O. Ogunsola, M. Downing
This paper gives a brief overview of impacts of coal blending on coal-fired power plants performance and discuses the preliminary results of an on-going study aimed at evaluating the effect of coal pr
Feb 24, 1997
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Carbon Emissions From Base Metals - Preprint 09-096
By M. J. Farrell
Mining is a significant emitter of greenhouse gases and is the focus of increasing attention from green groups and regulators. Miners need to know their own carbon emissions and how they compare with
Jan 1, 2009
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One Mineralogist’s View of the PDAC Meeting
By Bruce Geller
Attending the Prospectors and Developers Association of Canada (PDAC) meeting and exhibit has become an annual tradition for many in the mining industry. Similar to last year’s synopsis, this report
Jan 1, 2003
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Coal Division - Coal for Electric Generation - Its Problems
The primary use of coal in the US is for electric generation. The problems associated with the use of this vast amount of coal is the central theme of these sessions. The problems discussed include: p
Jan 1, 1979
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Design And Construction Of The Lafayette Bluff Tunnel
By D. L. Petersen, C. R. Nelson, B. K. Nelson, B. D. Wagener
The Lafayette Bluff tunnel, currently under construction for the Minnesota Department of Transportation (MnDOT), will be among the widest highway tunnels in the United States. The 199-meter tunnel is
Jan 1, 1991
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Signal Processing With Wavelet Transform For In-Seam Seismic Based Mine Void Detection Technique
By M. Ge
Signal processing is a major challenge for In-Seam Seismic (ISS) technique. Fourier Transform is an important tool for signal processing such as frequency analysis. However, for ISS signal, localized
Jan 1, 2007
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Geotechnical Considerations No. 7 Subway Line Extension Project in New York City
By P. K. Das, S. K. Singh, C. C. Chang, E. C. Wang, R. B. Roberts
As part of the New York City’s redevelopment of the far west side of mid-town Manhattan, this project will add 1.5 miles of twin bored tunnel to No. 7 Subway Line. The proposed alignment extending fro
Jan 1, 2005
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Novel Coal Collector Derived From Pine Tree Pulping
By J. Hines
Traditionally, fuel oil or diesel was the collector of choice in coal flotation, but in recent years these materials have come under increased scrutiny because of concerns about the toxicity of some c
Jan 1, 2011
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Reducing Emissions Through The Use Of A Fuel Borne Combustion Catalyst
By R. Curtis
To achieve compliance with 2015 EPA Tier 4 Final regulations, which permit only around 10% of Tier 3 particulate matter (PM) and NOx emissions, a number of technologies are being implemented. Use of a
Feb 27, 2013
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Dust Control Considerations For Deep-Cut Faces When Using Exhaust Ventilation and a Flooded-Bed Scrubber - Preprint 97-48
By R. A. Jankowski
The U.S. Bureau of Mines (USBM) conducted a series of laboratory tests to investigate the effectiveness of using a flooded-bed scrubber with exhaust ventilation in deep-cut faces of up to 12.2 m in le
Feb 24, 1997
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Testing and analysis of cement foam materials for coal mine seals - SME Transactions 2014
By K. M. Mohamed, R. K. Zipf
The shear strength properties of generic cement foam material and cement foam/concrete interfaces were examined at three testing scales. In laboratory direct shear tests on specimens with average shea
Jan 1, 2014
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Flexible Change Of Support Model Suitable For A Wide Range Of Mineralization Styles
By D. F. Machuca-Mory
A change of support model consists of a procedure to change a stationary histogram at a small data scale to represent a larger scale; typically a distribution of sample drill-hole data is changed to r
Jan 1, 2008
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The Mineral Nature Of Asbestos
By Malcolm Ross
Fibrous minerals are common in nature but asbestiform minerals are rare. The unique mineralogical characteristic common to all the asbestos minerals is their morphologic form (or habit of crystallizat
Jan 1, 2007