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The application of vertically-mounted jet fans in ventilation shafts for a rail overbuild
By R. E. Ray
Compared to conventional fully ducted axial and centrifugal fan systems, jet fans can offer a number of advantages for control of smoke during fire emergencies and dilution of diesel engine exhaust pr
Jan 1, 2009
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Los Angeles Metro Gold Line Eastside Extension—Tunnel Construction Case History
By Christophe Bragard, Brett Robinson
This paper reflects the challenges encountered during the construction of the light rail tunnels under Boyle Heights, in Los Angeles, California. Equipped with two state-of-the-art EPB TBMs, the c
Jan 1, 2007
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A Bubble Coalescence Study Using Sound - Preprint 09-076
By W. Kracht
Frothers are surfactants used in floatation to aid generation of small bubbles. Studying events at the moment of bubble creation is a challenge because of the short time frame. This presentation intro
Jan 1, 2009
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Recent Advances In Coal Spiral Development – Preprint 97-82
By W. S. Weldon, R. M. G. Machunter
The use of spiral separators for the beneficiation of fine coal typically in the size range - 2+0.lmm is now well established process technology. Developments during the mid 1980's resulted in th
Feb 24, 1997
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International Standards in Public Participation in Financing Oil and Gas Pipelines: The Transparency of Risk Management Measures and Emergency Response Plans
By E. Nickel
"Bi- and multilateral banks as well as export credit agencies in the OECD countries, but also numerous commercial banks, last year committed themselves to compliance with the World Bank’s standards. T
Jan 1, 2005
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Keys To Selecting An Expert Electric Motor Shop
By Fredrick Fränding
In mining and quarrying operations, electric motors can fail for a variety of reasons. Some failures are directly linked to demanding production requirements and contaminant-laden environments and, co
Jan 1, 2009
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Planning Of Ventilation And Air-Conditioning In Hot And Deep Mines
By Mehmet Guney
Acceptable working environments in production areas and service openings of Mindola Mine on the Zambian Copperbelt are currently maintained with an air volume of 1000 cu m/s and 5500 kW of installed
Jan 1, 1982
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Development Of An On-Line Coal Washability Analysis System Using X-Ray Computed Tomography
By G. T. Adel, J. D. Miller, C. L. Lin
Washability analysis determines the maximum separation efficiency that can be achieved in the operation of coal preparation plants. Unfortunately, there are no on-line techniques for determining this
Jan 1, 2000
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OCHRE ? A Natural Iron Oxide In The Colored Pigment Market
By S. D. Bearden
Color enhances expression and communication in all physical objects experienced in life. Pigments provide color and in some applications have a specific additional function. Natural iron oxides are wi
Feb 27, 2013
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Developing Trees Tolerant to Degraded Mine Soils in an Underground Greenhouse Mining, Metallurgy and Exploration
By Michael Kukay, Paul Conrad, Cosmas Opoku-Ware
This project is exploring the potential for developing trees tolerable to degraded un-reclaimed mine site soils and tailings as a solution to re-establishing long-term tree growth on those sites. The
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LiDAR Mapping of Ground Damage in a Heading Reorientation Case Study
The Subtropolis mine is a room-and-pillar mine extracting the Vanport Limestone near Petersburg, Ohio. In February 2018, mine management began implementing a heading reorientation to better control th
Jan 7, 2020
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Mining Development In The Context Of Regional Development
By K. Oraee
A comprehensive, harmonic and sustainable development has always been a real concern of state policy makers. To reach such development, regional planning is an approach which is widely applied. Th
Jan 1, 2012
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Quantifying Relationships Between Subsidence and Longwall Face Advance Using DInSAR
Surface subsidence that results from longwall mining can be large magnitude and can affect significant areas. Conventional methods for subsidence monitoring include leveling, global positioning system
Jan 7, 2020
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An Analysis Of Subsidence Movements Associated With An Abandoned Shallow Room-And-Pillar Coal Mine
By Yoginder P.
ACKNOWLEDGEMENTS Authors sincerely appreciate the interest, cooperation and technical support of the coal company management and staff in conducting the study. Without their assistance this study
Jan 1, 1986
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Application of Ground Freezing for Underground Construction
By Helmut Hass, Michael S. Shultz
For many tunneling, deep shaft and deep excavation projects ground freezing is one of the best if not the only technique available to create a watertight and load bearing temporary support system in s
Jan 1, 2005
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Use of the Field-Based Silica Monitoring Technique in a Coal Mine: A Case Study Mining, Metallurgy and Exploration (73df3ae5-6ddf-4125-a270-9ce737fe4b48)
By James J. Meadows, Jason D. Pampena, Emanuele G. Cauda, Lauren G. Chubb
Exposure to respirable crystalline silica (RCS) can cause serious and irreparable negative health effects, including silicosis and lung cancer. Workers in coal mines have the potential of being expose
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Missouri-Rolla’s Online Program Gains Popularity
By Tad S. Golosinski, R. Larry Grayson
Online education is not new. During the last decade, it has reached the stage where many universities offer a variety of courses, degrees and programs without any associated residency requirements.
Jan 1, 2002
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Effects Of Obstructions, Sample Size And Sample Rate On Ultrasonic Anemometer Measurements Underground
By A. L. Martikainen
In fluctuating airflow, continuous air velocity recording is the most reliable method of air velocity measurement. It allows for fast recognition of changes and the calculation of long-term averages.
Jan 1, 2011
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Seismic Design Measures for the Retrofit of the Claremont Tunnel
By Bill Cain, David F. Tsztoo, R. John Caulfield, D. Scott Kieffer
In 1994, the East Bay Municipal Utility District (EBMUD) commenced a system-wide Seismic Improvement Program to protect their facilities from catastrophic damage. A primary focus of this program has b
Jan 1, 2005
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How to Size Smooth Roll Crushers
By Adam Zanker
Smooth roll crushers are widely used as secondary crushers, operating most effectively when set for size reductions in a ratio between 3 or 4 to I. The feed supplied to these units varies from 13 to
Jan 6, 1980