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Hydrothermal Silicification and Alteration of Breccias from Lucky Strike and Menez Gwen hydrothermal fields (Mid-Atlantic Ridge, Azores)
By I. A. Costa, Y. Fouquet, F. Barriga
"Lucky Strike and Menez Gwen are two hydrothermally active sites located along the border of the Azorean plateau, southwest of the Azores islands where the alteration processes affecting basaltic rock
Sep 1, 2014
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Long Distance Conveyor Control ? Introduction
By Charles LeMoyne
The Cable belt Company has been building single flight conveyors for a number of years. The simple design concepts of this type conveyor, introduced over thirty years ago, when distances of one to two
Jan 1, 1983
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New Test Methodology For Estimating The Abrasiveness Of Soils For TBM Tunneling
By F. Dahl, P. Raleigh, J. Holzhauser, B. Nilsen
Tunnel excavation using tunnel boring machines (TBMs), has become increasingly common in recent years, despite the fact that precise evaluation of certain risks have not kept pace with the use of thes
Jan 1, 2007
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Industrial Minerals 2007
Editor?s note: Each year, the June issue of Mining Engineering features an industrial minerals review. Several people put in a fair amount of time in developing the material for this issue. Thank y
Jan 1, 2008
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Eskay Creek Mine and Mill – A Continuing Success
By Garry Biles
The Eskay Creek Mine is a high-grade gold and silver underground mine in northwestern British Columbia. The mine started operations in late1994. For the first three years, ore was crushed to -50 mm(-
Jan 1, 2000
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Preventive Maintenance Policy Supported By A Quality Control Chart And Kolmogorov-Smirnov Tests: Emet Colemanite Mineral Processing Plant, Turkey
By S. Yerel
In a mineral processing plant, the determination of a preventive maintenance schedule is one of the most important maintenance policies. In this study, to determine the preventive maintenance schedule
Jan 1, 2007
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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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Roof Monitoring Helps Prevent Injuries in Stone Mines
By A. T. Iannacchione
From 1990 to 1996, 16 states reported 92 injuries from falls of roof, rib or face in the more than 90 underground stone mines in the United States (Fig.1). Missouri, Pennsylvania and Kentucky account
Jan 1, 2000
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Tectonic Stress Reconstruction Based on Structural Features in Tectonic Superposition Areas Mining, Metallurgy and Exploration (db46774a-751c-4994-a9c0-cdb544845a1e)
By Chen Lin
Tectonic stress is an important parameter for understanding the dynamics of underground engineering and for the exploitation of coalbed methane. Multiple-period structural features usually have comple
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Tectonic Stress Reconstruction Based on Structural Features in Tectonic Superposition Areas Mining, Metallurgy and Exploration
By Chen Lin
Tectonic stress is an important parameter for understanding the dynamics of underground engineering and for the exploitation of coalbed methane. Multiple-period structural features usually have comple
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Multi-Gravity Separator: An Alternate Gravity Concentrator To Process Coal Fines
By A. K. Majumder
The multi-gravity separator (MGS) is a novel piece of equipment for the separation of fine and ultra-fine minerals. However, the published literature does not demonstrate its use in the separation of
Jan 1, 2007
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Newmont’s Ahafo Mine – Gold Mining in West Africa
By John Mitchell, Mark K. Jorgensen
Newmont Mining’s Ahafo Mine is located in Ghana approximately 300 km (190 miles) northwest of the capital city of Accra in the Brong-Ahafo region. The nearest city is Sunyani, located 45 km (28 miles)
Jan 1, 2007
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Thermal Fragmentation as a Possible, Viable, Alternative Mining Method in Narrow Vein Mining? Mining, Metallurgy and Exploration (bd487436-b3d1-4763-8a02-8d7c396a0d79)
By Larissa Koroznikova, Steve Durkin, Patrick Bouwmeester, Michael Tuck
In currently used mining methods, blasting techniques often causes dilution of valuable ore and results in costly processing requirements. In the context of narrow vein mining of thin and highly conce
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The Regulation of Subsidence and Underground Coal Mining in Illinois
By Paul J. Ehret
With the passage of the Surface Mining Control and Reclamation Act (SMCRA), and the implementation of state permanent programs, underground coal mining operations are for the first time subject to gov
Jan 1, 1986
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Allegheny River Tunnel Crossing Project
By Paul A. Roy
The North Shore Connector Project for the Port Authority of Allegheny County constructs twin Tunnel Boring Machine (TBM) tunnels through cohesive soils and rock beneath the Allegheny River and a narro
Jan 1, 2008
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Pressure Sulfuric Acid Leaching of Manganese-Rich Slag with Pyrite as Additive Mining, Metallurgy and Exploration
By Shanming He, Jinliang Wang, Xiaoming Wang, Chunfa Liao
Large amounts of manganese-rich slag were generated from smelting low-grade manganese ore containing high iron and high phosphorus in electric furnace or blast furnace, which contain 25–40 mass% Mn. T
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Pressure Sulfuric Acid Leaching of Manganese-Rich Slag with Pyrite as Additive Mining, Metallurgy and Exploration (7db33dda-c50f-417f-8a4f-b58cc9ccfa5b)
By Shanming He, Jinliang Wang, Xiaoming Wang, Chunfa Liao
Large amounts of manganese-rich slag were generated from smelting low-grade manganese ore containing high iron and high phosphorus in electric furnace or blast furnace, which contain 25–40 mass% Mn. T
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The Crossrail Experience
By Bill Tucker, Mike Black
"PROJECT OVERVIEW Crossrail, Europe’s largest construction project, will increase London’s transportation capacity by 10% when it opens in 2018. The Crossrail scheme is a combination of surface and un
Jan 1, 2016
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Lithium Resources
By Ihor A. Kunasz
Lithium minerals occur predominantly in pegmatites that contain mineral assemblages derived from the crystallization of post- magmatic fluids or from the metasomatic action of residual peg- matitic fl
Jan 1, 1994
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Liebherr Celebrates 50th Anniversary, Introduces 300-ton Mining Truck
By William R. Yernberg
In October 1999, Liebherr-America, Liebherr Construction and Liebherr Mining Equipment held anopen house at its Newport News, VA, plant. The open house was held to celebrate the company’s50th anni
Jan 1, 2000