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July 2012

Volume 64    Issue 7

COAL

Importance of monitoring for deep two-seam longwall layouts
K. Fleck, C. Semborski, I Christensen, H. Maleki
Preview  

FEATURED ARTICLES

Design considerations for impounding valley leach pads vs. conventional
Allan Breitenbach, Mark Smith
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Minnesota’s vibrant mining industry ranks third in revenues generated
Greg Beckstrom
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2011 review of zirconium
R. Adams
Preview  
Is bigger better? Colorado MPD examines age-old question
William Gleason
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Building on success: SME Minnesota Section Annual Meeting
Emily Wortman-Wunder
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TECHNICAL PAPERS

Coal workers’ pneumoconiosis prevalence disparity between Australia and the United States
G. J. Joy, J. F. Colinet, D. D. Landen
Abstract  
Development of a canopy air curtain to reduce roof bolters’ dust exposure
J. M. Listak, T. W. Beck
Abstract  

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