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Boring At High Thrust And Its Potential In The Hard-Rock Mining Industry In South Africa
By J. W. Wilson, P. C. Graham
SUMMARY The Witwatersrand quartzites in which South African gold mining operations are moat exclusively conducted, are notoriously difficult and costly to drill. Despite this situation, however, wi
Jan 1, 1974
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The Significance Of Filter Cake Pore Structure As Determined By Micro-Ct In The Analysis Of Filtration Phenomena
By J. D. Miller, C. L. Lin
Filtration of fine particles involves filter cake formation and removal of surface moisture by drawing air through the porous structure. Accurate assessment of the transport properties of porous medi
Jan 1, 2002
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Legal Problems In Undersea Mineral Development ? I. Introduction
By Northcutt Ely
My topic today is our Nation's interest in the minerals beneath the oceans. I will state what I think should be our objectives, the means available to attain these objectives, and the obstacles t
Jan 1, 1969
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Preventing Roof Falls in Weak Ground
By Ryan C. Stephan, Christopher Mark
"Some of the weakest roof in United States coal mines is found in the Illinois Basin. Historically, the Illinois Basin has also suffered from high rates of unplanned roof falls and rock fall injuries.
Jan 1, 2019
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Update On Development Of Mini-Disc Drill Bits
By J. E. Friant
The Mini-DiscTM cutter drill bit is a radical design departure from the traditional tri-cone rockdrill bit. Miniature disc type cutting tools as small as 3.25 inches (82.5 mm) diameter are fitted to
Jan 1, 1999
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Evaluation Of High-Temperature Disposable Filter Elements In An Experimental Underground Mine
Filtration systems with disposable filter elements (DFEs) are used in the underground coal mining industry to control particulate matter emissions from diesel-powered permissible and nonpermissible co
Jan 1, 2011
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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
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Maintenance Contract on Cat 785 Trucks Works Well at Round Mountain
By J. B. Rasmussen
As part of a purchase of a fleet of Caterpillar 785 trucks, Round Mountain Gold Corp., Cashman Equipment Co. and Caterpillar Inc. entered into a four-year contract for the major maintenance of the fle
Jan 1, 1991
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New Developments In The Recovery Of Manganese From Lower Grade Resources
By N. Chow
The recovery of manganese from lower grade resources has been studied for a number of years. Of key importance of prior work, was the discovery that higher valent manganese resource can be readily lea
Jan 1, 2011
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Development of a tool for assessing the environmental sustainability of mining facilities
By G. Gaidajis, K. Angelakoglou
The development of a tool for assessing the environmental sustainability of mining facilities is described in this study. The tool is based on the analysis of basic components of the examined system,
Jan 1, 2011
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Gotthard-Base Tunnel, Section Faido Previous Experience With The Use Of The TBM
By Martin Herrenknecht
After the successful breakthrough at the end of 2006 of both TBMs into the multifunctional site Faido (MFS), in the middle of 2007 the two tunnel boring machines resumed the 12 km long section between
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Technical Note - Thick seam mining with artificial roof laying support
By J. B. Gwiazda
Introduction Thick seams constitute a considerable portion of Polish coal reserves. In producing mines and those under construction, the reserves where the height is more than 4.5 m (15 ft) total a
Jan 3, 1987
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Double Shields to Build the High Speed Railway Network in Spain
By E. Fernandez
HIGH SPEED RAILWAY NETWORK Spain is a very adequate country to develop the high speed railway network thank to its geographical feature which has a 600km long radius, from Madrid- the capital that
Jan 1, 2005
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Ambitious Endeavors in Mechanized Shaft Construction: A Case History of Two Mine Shaft Projects in Australia
By John Zeni
In Australia during the 1990s, Zeni Drilling took on several demanding shaft boring contracts. This paper describes the safety, operational, technical and environmental advantages derived through the
Jan 1, 2001
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Multiple Criteria Approach To Model Calibration In Dem Simulation Of Compaction Processes
By A. Sand
A 2-dimensional computational model based on the discrete element method (DEM) is utilized for modeling of stamp-charged coke making. In this process, a large volume of coal is compacted to one single
Feb 27, 2013
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Geochemistry of ilmenite and applications to ilmenite provenance and Ti-mineral exploration
By Antonio Pineda, Roger K. McLimans, Felicity E. Lloyd
lmenite is a primary ore feed to the DuPont chloride process for the manufacture of titanium diox-ide pigment. We seek to determine ilmenite geochemistry as a function of original source and as-certai
Jan 1, 2005
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The Upper Pennsylvanian Pittsburgh Coal Bed: Geology And Mine Models
By L. F. Ruppert, W. D. Watson, S. J. Tewalt, L. J. Bragg
The U.S. Geological Survey recently completed a digital coal resource assessment model of the Upper Pennsylvanian Pittsburgh coal bed which indicates that of the original 34 billion short tons [31 bil
Jan 1, 2000
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Variations In New Mexico Concrete Through Time
By Kristen E. Coose
Concrete is a mixture of a fine aggregate (sand), a coarse aggregate (gravel), cement, and water. Cement itself is the most expensive of the ingredients but generally amounts to only about 10% of the
Jan 1, 1999
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Fitness-For-Purpose: Should You Buy One Grinding Mill For The Price Of Two?
By P. Ulrich, V. Svalbonas
The early to mid 1980s was a period of mining consolidation, and many senior design engineers retired from the mill industry. Similar conditions have existed in the last few years. This creates a lo
Jan 1, 2001
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If the Technology Fits: an Evaluation of Mobile Proximity Detection Systems in Underground Coal Mines Mining, Metallurgy and Exploration (42170b04-f5e7-4cc7-898c-55ceeac8ed22)
By LaTasha R. Swanson, Jennica L. Bellanca
Proximity detection systems (PDSs) for mobile machines have the potential to decrease injuries and fatalities. Early adopters of the technology have identified some challenges, which present an opport