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Underground Extraction Of Contiguous Coal Seams/Sections Consisting Thin Parting: A Case StudyBy Rajendra Singh
Underground depillaring of contiguous coal seams/sections is a difficult problem, which becomes even more complex if the interburden/parting between them is thin. Conventionally, the depillaring with
Jan 1, 2004
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Coal - Some Geological Factors Affecting the Upper Freeport Coal and Its QualityBy E. F. Koppe
The Upper Freeport coal in the Freeport and New Kensington quadrangles, Pennsylvania, varies from a bony streak to a thick coal deposit often exceeding ninety inches, the "Double" or "Thick Freeport".
Jan 1, 1961
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The Critical Minerals Initiative of the US Geological Survey’s Mineral Deposit Database Project: USMIN "Mining, Metallurgy & Exploration (2021)"By Patrick Scott, Germán Schmeda, Morgan Mullins, Liam Knudsen, Bradley S. Van Gosen, Carma A. San Juan, Nicholas A. Karl, Jeffrey L. Mauk, Clayton Forbush
The objective of the US Geological Survey’s mineral deposit database project (USMIN) is to develop a comprehensive twentyfirst century geospatial database that is the authoritative source of the most
Feb 8, 2021
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History Of Timber Piles And Preservation Techniques - A Presentation At The Deep Foundations Institute Annual Meeting Williamsburg, Virginia, December 1982By Bruce Haldeman
Timber has been used as pile support for structures for 6,000 years. Some means of preservation of wood go back almost that far. Timber piles support all types of structures ? some are buried below th
Jan 1, 1984
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Continuous Improvements of Porcupine Joint Venture (PJV) Dome Mine's Gravity CircuitBy T. Y. Chong, J. A. Folinsbee, M. Fullam
PJV Dome Mine has used some form of gravity concentration since start of milling operation in 1909 to recover free milling gold. Amalgamation and conventional jigs were first used and were replaced wi
Jan 1, 2005
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The Ivar Project - An Uncommon, Everyday TBM TunnelBy Yngve Jordal, Sverker Hartwig
The IVAR Project is Norway's largest sewer project presently under construction. One part of it is an 8.1 km (26 575 ft) long, 3.5 m (11 ft 6 in.) diam tunnel, bored in one year. The tunneling pr
Jan 1, 1991
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Performance Comparison of Real-Time Light Scattering DustMonitors Across Dust Types and Humidity Levels Mining, Metallurgy and ExplorationBy Donald P. Tuchman, Justin R. Patts, Emanuele G. Cauda, Andrew B. Cecala, Elaine N. Rubinstein
Video techniques for monitoring exposure, such as NIOSH’s “Helmet-CAM,” employ both real-time dust monitors and mobile video cameras to assess workers’ respirable dust exposures. Many real-time person
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Breakage Characteristics for Ores for Ball Mill ModellingBy Whiten W. J
An investigation on the breakage characteristics of closely sized orc samples at different levels of input energy was carried out to determine an appearance function for possible use in ball mill mode
Jan 1, 1983
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OFR-88-80 Phase 1: Research On The Hydrology And Water Quality Of Watersheds Subjected To Surface MiningFive watersheds, ranging in size from 29 to 49 acres, were selected in East-Central Ohio to investigate the hydrologic and water quality conditions occurring before, during, and after surface mining.
Jan 1, 1978
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Evaluating Options For Gold Heap Process Optimization Using A Comprehensive Process ModelBy S. Garcia, J. Gebhardt, D. McBride, A. Hernandez, A. Esplín, M. Cross
The Minera Yanacocha operation consists of several heaps interconnected with ponds and gold recovery plants and presents various operating challenges. A comprehensive process model has been developed
Jan 1, 2007
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The Aurora Super-Pump, a Large Diameter Slurry Pump for Aurora NorthBy D. Wolfe, R. Cleminson
"The Aurora North mine has been operating for more than ten years, and is the source of over half of Syncrude’s bitumen production. The slurry systems at Aurora experience high rates of wear, and miss
Jan 1, 2013
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Back Caving Mechanism and Preventive Measures for Deep Open Stopes ? Case StudiesBy Jerry Ran
Stope back caving in a mine using open stope mining interrupts the planned mining sequence and causes oversize muck and dilution with adverse economic implications. As many underground mines are minin
May 1, 2004
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Top Coal Failure Mechanism Of Extremely Thick Seam In Top Coal Caving MiningBy Nan Hua
As a high production and high efficient mining method, top coal caving method is now widely used in China. However, as more extra-thick coal seams are mined, it becomes more and more difficult to make
Jan 1, 2009
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Maximizing Gravity Recovery through the Application of Multiple Gravity DevicesBy J. A. Abols, P. M. Grady
Recovery via gravity is one of the oldest mineral processing methods available. Unfortunately, the use of gravity techniques for gold recovery has been in decline for the past century as more effectiv
Jan 1, 2005
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Flotation Improvements in the Luzenac Penhorwood Talc ConcentratorBy Ross Byron, Ken Roberts
"During the fall of 2001 a program was initiated to determine the feasibility of improving the metallurgy in the flotation circuit at the Penhorwood Talc Concentrator located near Timmins, Ontario. Be
Jan 1, 2004
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Diaphragm Wall Construction, Instrumentation, and Testing for a Hydroelectric Power FacilityBy David Gatto, Nicolas A. Willig-Friedrich, Jeff A. Segar
"With the increasing demand for electricity, and requirements to generate this power cleanly, more producers are turning towards hydroelectric power. A project in Iowa currently under construction wil
Jan 1, 2016
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Vegetative Studies on Sulphide and Slag TailingsBy E. M. Watkin
"Although Canada has achieved one of the highest living standards in the world, people and organizations have, over the past decade, begun to question the cost and means of this achievement. Concern h
Jan 1, 1975
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OFR-50(2)-75 Evaluation Of Mill Tailings Disposal Practices And Potential Dam Stability Problems In Southwestern United States. ? V.2 - Investigation Report, Phelps Dodge Corporation, Morenci Tailings Dams, Morenci, ArizonaVolume 2 presents the results of studies of Phelps Dodge Corporation's tailings embankments numbers 1West and 2 West, at Morenci, Ariz. The work involved compilation and description of pertinent
Jan 1, 1974
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Circular TunnellingThe work described herein is the opening phase of an extensive system of underground excavation undertaken under contract with a Malayan authority.The specifications called for the lining of all tunne
Jan 1, 1941
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Challenging Perceptions? Sustainability Reporting, the Media and MiningBy P Clark, P A. Kirsch, R Tapia Rivera
Community members’ sources of information about companies’ social investments are often influenced by the messages in a variety of communication channels, such as newspapers, television and social med
Jul 16, 2014