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Stratified Sampling of Drill Core
By Norman O. Lotter
Drill core is preferred as the sample material for metallurgical and mineralogical characterisation and flowsheeting of an orebody. The question arises as to how to do this at the economic optimum, si
Jan 1, 2010
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OFR-22-72 Evaluation Of Anemometers For Use In Coal Mines - I. Introduction - A. Background
By J. F. McCoy
The quantitative determination of the mass rate of flow of methane in an underground airway is calculated as the product of the methane concentration and the air flow rate. Velocities are taken at sev
Jan 1, 1972
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Silver In Transition ? Introduction
By Mark E. Emerson
1967 will be remembered as the year the world realized it was running out of silver. In May of this year a new era in tin the history of the white metal was begun as the power of the U.S. Treasury to
Jan 1, 1967
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The State of Sampling Practice in the South African Minerals Industry
The state of sampling practice in South African minerals industry must be appreciated in the context of the changes that the country has recently lived through. These include the entrepreneurship and
Mar 1, 2010
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The Use Of Instrumented Split-Set Rock Bolts To Monitor Strain In The Walls Of A Deep Underground Mine Stope
By F. Maciosek, D. Denton, J. Johnson
Researchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health and personnel from Coeur Silver Valley, Wallace, ID, conducted tests using rock strain st
Jan 1, 2004
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Pregrouting in Rock: Contemporary Basic Principles
By Donald A. Bruce
Pregrouting is an extremely important part of many rock tunneling projects. However, poor and unsatisfactory performances have been frequently recorded often with very severe consequences, technically
Jan 1, 2005
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New York Paper - Austenite and Austenitic Steels
By John A. Mathews
It is a great honor to be asked by the Board of Directors of this Institute to deliver the Henry Marion Howe lecture. The invitation carries with it a great responsibility, which I accept with conside
Jan 1, 1925
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Development of New Frothers through Hydrodynamic Characterization of Frother Chemistry
By J. A. Finch
"Much progress has been made over the last several years in the ability to measure flotation cell hydrodynamic parameters in both the laboratory and plant. These techniques have allowed fundamental re
Jan 1, 2007
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Roof Control Analysis In North River Mine
By Mike Watts
Since the first longwall panel development started in the new mining, (Southern) area, a number of roof falls have occurred in L1 and L2 gate-entries. The longwall was delayed for a total of two month
Jan 1, 2000
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IC 8380 United States Coals In World Markets
By George Markon
The importance of United States coal exports as a component of the national economy, the potential for growth of these exports, and the inter-national character of this sector of the coal industry are
Jan 1, 1968
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Part VI – June 1968 - Papers - An Electron Microscope Investigation of Explosion-Bonded Metals
By Lucien F. Trueb
The microstructure of explosion-bonded pairs of similar and dissimilar metals has been investigated by electron microscopy. A review of the specific problems encountered and the methods used for obtai
Jan 1, 1969
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The economics of diamond projects in the Canadian Arctic (bbedb282-085a-4c62-8fa2-4245fef0430a)
By W. Bullen
A hypothetical economic model has been developed for diamond projects in the Canadian Arctic using data from recent exploration and mining projects. The model reflects economic conditions applicable t
Jan 1, 2006
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IC 6465 Zircon The Gem
By E. P. Youngman
From a scientific point of view , the zircon is by far the most remarkable of the gem stones , and a satisfactory solution of the problems offered by its characters and constitution has not yet been m
Jul 1, 1931
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Notes on Ruff's Carbon-Iron Equilibrium Diagram.
By J. E. Johnson
Discussion of the paper of Prof. Henry M. Howe, presented in abstract by Bradley Stoughton at the Cleveland meeting, October, 1912, and printed in Bulletin No. 71, November, 1912, pp. 1181 to 1227. J
Dec 1, 1912
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Bougainville's EDP Techniques Up Mine Productivity, Simplify Planning
By H. David Swain
On Bougainville Island in Papua New Guinea, Bougainville Copper Ltd. (BCL) has successfully applied electronic data processing (EDP) techniques to pit operations and mine planning. Though the EDP prog
Jan 3, 1979
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OFR-68-73 EM Location System Prototype And Communication Station Modification (3f90e3fe-7df3-4a30-87c7-cb58a9840560)
A prototype EM Location System was fabricated and tested at the Geneva Mine near Dragerton, Utah. This system consisted of six manpack transmitters and six manpack receivers covering the frequency ban
Jan 1, 1973
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An Improved Definition of Rock Quality Designation, RQDc
By L. Li
The rock quality designation (RQD) was initially introduced by Deere (1963) for civil engineering. But, its application has been largely extended to rock mechanics and has become a fundamental paramet
May 1, 2009
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Native Metals
By Fathi Habashi
While it is commonly known that the precious metals and to some extent copper occur in the native state, it is less known that mercury, iron, nickel, and cobalt do occur also in the native state; the
Jan 1, 1993
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Frother Analysis: Procedure and Plant Experiences
By James A. Finch, Stéphanie Gélinas
"A colorimetric technique, originally developed for methyl iso butyl carbinol (MIBC) based on the Komarowsky reaction, has been extended to a wide range of common mineral flotation frothers. The proce
Jan 1, 2007
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MLA 9-90 - Mineral Appraisal Of The White River National Forest, Colorado
By S. Don Brown
Between 1987 and 1988, the Bureau of Mines studied the mineral resources of the White River National Forest and part of the Arapaho National Forest to appraise the resources present and to determine t
Jan 1, 1990