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  • SAIMM
    Dispersion Variance And The Grade-Tonnage Relationship - 7.1 Definition Of The Variance Of Dispersion

    [The following notations will be used: O an ore body. z a point in O. z' another point in O. w0 (z) a point support of infinitely small dimensions w0 centred in z. w (z) a sample (or

    Jan 1, 1978

  • NIOSH
    Review Of The Mineral Industries (Metals And Nonmetals Except Fuels) (8111a13c-5fba-46f4-ad27-90a538b86049)

    By Kung-Lee Wang

    SUSTAINED growth characterized the U.S. economy in 1964. Many new peaks were achieved in production, sales, employment, employee earnings, and business profits. At the end of 1964, the economy had exp

    Jan 1, 1965

  • NIOSH
    RI 3607 Survey Of Fuel Consumption At Refineries In 1940 ? Summary (f1efc389-e9c3-4eba-8963-f97bc5925e7a)

    By G. R. Hopkins

    The average heat requirement per barrel of crude processed in the United states rose from 555,000 B. t. u. in 1939 to 579,000 B. t. u. in 1940, although crude runs increased from 1,237,840,000 barrels

    Jan 1, 1942

  • NIOSH
    RI 3607 Survey Of Fuel Consumption At Refineries In 1940 - Summary

    By G. R. Hopkins

    The average heat requirement per barrel of crude processed in the United states rose from 555,000 B. t. u. in 1939 to 579,000 B. t. u. in 1940, although crude runs increased from 1,237,840,000 barrels

    Jan 1, 1942

  • SAIMM
    Book News

    1. New publications International minerals/metals review - 1982. Washington D.C., McGraw-Hill, 1983.720 pp. U.S.$1l7. Mining subsidence engineering, by Helmut Kratzsch. New York, Springer, 1983.580 pp

    Jan 1, 1983

  • NIOSH
    IC 8848 Cobalt Availability - Domestic - A Minerals Availability System Appraisal

    By G. R. Peterson

    The Bureau of Mines evaluated the potential supply of cobalt from known domestic resources, both as a primary product from some deposits and as a byproduct from others, and found that U.S. production

    Jan 1, 1981

  • AIME
    Some Criteria For Longwall Selection

    By Anthony Sharkey

    Introduction In Europe, longwall mining accounts for over 95% of coal produced from deep mines, whereas in the U.S.A., longwall accounts for less than 5% of deep mine coal production. There are many

    Jan 1, 1981

  • AIME
    Mining Engineering REPORTER (37f61651-6902-4e0a-9a52-2d2ce6e71bba)

    • The Venezuelan Trade Mission to the United States announced that Bethlehem Steel Corp. will begin exporting iron ore from its El Pao concession, south of the Orinoco River in Venezuela, in about thr

    Jan 4, 1950

  • AIME
    The Production Control Problem

    FOLLOWING the presentation of the papers by Messrs. Mahan and Butler, the discussion printed below ensued. A. C. LANE* With particular reference to the New England con-sumer, I entirely agree with M

    Jan 4, 1928

  • SME
    Use Of Satellite Imagery In The Study Of Geologic Structure And Roof Stability Relationships

    By Thomas A. Simpson

    Heretofore, underground coal mines in Alabama have operated under only 60 to 360 meters of cover: however, new mines (at least 5 in the early opening or development stages) will be operating under cov

    Jan 1, 1975

  • SME
    Leaching Tests On Chino "J" Dump Core Samples

    By W. A. McKinney

    The U.S. Bureau of Mines, Kennecott Copper Corp., and New Mexico Institute of Mining and Technology are cooperating on a research project to improve extraction of copper from previously leached waste

    Jan 1, 1970

  • SME
    Engineering of Cooks Lane Tunnel: An overview of challenges

    By V. Nasri, S. Rashidi

    The Baltimore Red Line Project is a proposed 22.7-km (14.1-mile) long east-west light rail transit (LRT) line envisioned to connect the areas of Woodlawn, Edmondson Village, West Baltimore, downtown B

    Jan 1, 2014

  • NIOSH
    Suggestion of a Cause-and-Effect Relationship Among Coal Rank, Airborne Dust, and Incidence of Workers’ Pneumoconiosis

    By Steven J. Page, John A. Organiscak

    Prolonged exposure to airborne respirable coal mine dust is responsible for coal workers' pneumoconi¬osis (CWP): Furthermore, miners who show evidence of higher radiographic categories of simple

  • CIM
    Relationship between Porosity and Surface Deposit Coverage for Wire and Arc Additive Manufactured Aluminium Alloy 2319

    By K. E. Harley, M. J. Whiting, T. J. Sabin, E. M. Ryan, J. F. Watts

    "Wire and Arc Additive Manufacturing (WAAM) has the potential to enable a very significant reduction in buy-to-fly ratio compared to conventional manufacturing through the ability to build near-net sh

    Jan 1, 2018

  • AIME
    Preliminary Production Report From the Bureau of Mines

    A record $18.7 billion worth of metals, non- metals and fuels was produced in the U.S. during 1962, according to a year-end estimate from the USBM. The 1962 total value, based on preliminary statistic

    Jan 2, 1963

  • IIMP
    Trazadores litogeoquímicos de fertilidad del magmatismo vinculado a pórfidos de Cu (-Mo, -Au) en el sur del Perú, del Jurásico al Mioceno

    By Alonso Marchena, William Martínez, Joel Otero

    En Arequipa, Moquegua y Tacna se han definido diversos arcos magmáticos. En los arcos jurásico, paleoceno y oligo-mioceno ocurren pórfidos de distintas características, los cuales presentan diferencia

    May 22, 2019

  • NIOSH
    MLA 22-88 - Mineral Resources Of The Slocum Creek And Upper Leslie Gulch Wilderness Study Areas, Malheur County, Oregon ? Summary

    By John R. Benham

    In 1987, at the request of the Bureau of Land Management~ the U.S. Bureau of Mines studied 7,600 and 3,000 acres, respectively, of the Slocum Creek (OR-003-075) and Upper Leslie Gulch (OR-003-074) Wil

    Jan 1, 1988

  • AUSIMM
    The Formation of Banded Epithermal Quartz Veins at the Golden Cross Mine, Waihi, New Zealand (259f22f9-c28d-4e93-a131-7c2df11c6c1d)

    By Mauk JL, Arehart GB, Mathews SJ

    The banded nature of the quartz veins which form the Empire lode at the Golden Cross mine, is perhaps their most striking feature. Petrographic studies show that significant differences occur between

    Jan 1, 1995

  • AIME
    Field Activation Analysis of Uranium Ore Using 252Cf Neutron Source

    By Phillip Philbin, Frank E. Senftle

    A field neutron activation analysis technique suitable for determining uranium in ores has been tested. The method is based on the measurement of the 74.7 keV gamma ray from 'U. When the thorium/

    Jan 1, 1972

  • SME
    Shaft Construction By Raise Boring Through Artificially Frozen Ground

    By D. E. Hart, A. R. Walsh, Derek Maishman

    In order to safely construct a ventilation and escape shaft through saturated overburden into an operating mine, artificial ground freezing and raise boring were combined for the first time on a proje

    Jan 1, 1991