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  • NIOSH
    IC 7015 Gold Mining And Milling In Northeastern Oregon ? Introduction

    By S. H. Lorain

    This paper is a preliminary report on recent lode gold mining activity, operating conditions, and mining and milling methods at properties in production in September 1936 in the gold belt of northeast

    Jan 1, 1938

  • NIOSH
    Diagnosing and Controlling Moisture - Sensitive Roof in Coal Mines

    By Gregory Molinda

    Historically, coal miners have known that roof shales can deteriorate in contact with humid mine air, causing massive roof falls and injuries from falling rock. It is critical to recognize rocks prone

    Jan 1, 2008

  • NIOSH
    RI 7431 Evaluation Of Chemical-Cartridge Respirator Face Fit

    By Harold A. Watson

    A method for measuring leakage of vapors into a chemical-cartridge half-mask facepiece during simulated use is described. The respirator, fitted with high efficiency cartridges, is worn in a dichlorod

    Jan 1, 1970

  • NIOSH
    OFR-141-77 Heap Leaching Studies On Uranium Ore, Phase IV

    By Robert C. Merritt

    This report describes laboratory as well as pilot heap leaching investigations of low-grade sandstone ores from Wyoming, New Mexico, and Colorado. Sodium carbonate-bicarbonate solutions containing sod

    Jan 1, 1977

  • NIOSH
    OFR-138(4)-84 The Development Of Guidelines For Closing Underground Mines: Michigan Case Histories ? Introduction

    The Menominee Range of northern Michigan was a major producer of direct shipping iron ore for nearly a century. When the last underground mine on the Range ceased operation in 1978, it marked the end

    Jan 1, 1983

  • NIOSH
    RI 4363 Method For The Spectrochemical Determination Of Beryllium, Cadmium, Zinc, And Indium In Ore Samples

    By Graham W. Marks

    Recently it was shown the total energy method of spectrochemical analysis is suitable for the quantitative estimation of many of the elements of which ores are composed. It was shown how this method c

    Jan 1, 1948

  • NIOSH
    OFR-127-83 Evaluation And Acceptance Criteria For Innovations In Explosionproof Electrical Enclosures

    By R. J. Gunderman

    A conventional trailing cable connection box on a continuous mining machine was modified by the addition of two innovative devices. These are a pressure vent to preclude buildup of high pressure due t

    Jan 1, 1982

  • NIOSH
    IC 7776 National Annual Diesel-Fuel Survey, 1956 ? Introduction

    By O. C. Blade

    Sales of diesel fuel in the United States during the post year and a half have increased greatly. In 1955 over 174 million barrels were sold of which 80 million (or 46 percent), were used by the railr

    Jan 1, 1957

  • NIOSH
    RI 9560 - In Situ Stress At The Lucky Friday Mine (In Four Parts) 2. Analysis of Overcore Measurement From 5300 Level

    By J. K. Whyatt

    The U.S. Bureau of Mines conducted an overcore stress measurement on the 5300 level of the Lucky Friday Mine, Mullan, ID, to investigate the stress regime around an experimental stope in a rock-burst-

    Jan 1, 2010

  • NIOSH
    IC 9498 - Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining

    Rock mass classification is widely used throughout the underground mining industry—in both coal and hard-rock mines. It is used in all stages of the mining process, from site characterization to produ

    Jan 5, 2007

  • NIOSH
    The Mineral Industry Of Other Areas Of The Far East And South Asia - Bangladesh (541c7bda-6ca8-4dc8-a808-237ef08a52f2)

    Mineral production was of little significance in the country's economy, and Bangladesh was not a world-ranked producer of any mineral commodity during 1977. Natural gas was the most important min

    Jan 1, 1981

  • NIOSH
    RI 9324 - Electrochemical Impedance Spectroscopy Study of Corrosion of Painted Cold-Rolled and Electrogalvanized Sheet Steel for Automotive Use

    By M. Dattilo

    The U.S. Bureau of Mines has been conducting research on the use of waste-derived zinc as a partial replacement for pure zinc in the electrogalvanizing process. The end product of this process is auto

    Jan 1, 1990

  • NIOSH
    RI 7485 Tungsten And Dispersion-Strengthened Tungsten Made By Freeze Drying

    By M. J. Ferrante

    The Bureau of Mines investigated the applicability of the freeze-drying technique for preparing dispersion-strengthened tungsten powders suitable for conversion by powder metallurgy into materials whi

    Jan 1, 1971

  • NIOSH
    OFR-77-81 A Model For The Determination Of Flyrock Range As A Function Of Shot Conditions

    By Julius Roth

    Flyrock is the source of most of the injuries and property damage in a majority of blasting accidents in surface mines. A quantitative correlation between shot conditions and maximum flyrock range can

    Jan 1, 1979

  • NIOSH
    RI 3614 Manganese Investigations - Metallurgical Division - 5. Ore-Dressing Studies Of Manganese Ores ? Beneficiation Of Manganese Wad Ore From The Chinn Property, Batesville, Ark.

    By S. M. Shelton

    Tests employing various ore-dressing methods were made on a manganese wad ore from the W. A. Chinn property in the Batesville-Cushman district of Arkansas in an effort to develop a practicable procedu

    Jan 1, 1942

  • NIOSH
    IC 9210 Application Of Stereoscopic (3-D) Slides To Roof And Rib Hazard Recognition Training

    By Edward A. Barrett

    The ability to recognize visual cues commonly associated with roof and rib hazards is fundamental to the prevention of groundfall accidents. The perceptual skills that miners possess to visually searc

    Jan 1, 1988

  • NIOSH
    RI 9092 - Effects of Ancient Stream Channel Deposits on Mine Roof Stability: A Case Study

    By David K. Ingram

    The Bureau of Mines conducted underground mapping and rock strength tests to describe and analyze mine roof conditions surrounding ancient stream channel deposits (paleochannels) in the Pittsburgh Coa

    Jan 1, 1987

  • NIOSH
    RI 8280 Design Requirements for Uranium Ion Exchange From Ammonium Bicarbonate Solutions in a Fluidized System

    By D. E. Traut

    A fluidized countercurrent ion-exchange system was developed, operated, and evaluated by the U.S. Department of the Interior, Bureau of Mines. The system consisted of integrated multiple-compartment a

    Jan 1, 1978

  • NIOSH
    IC 8092 Sand And Gravel Operations And Costs, Construction Aggregates Corp., Ferrysburg, Mich. ? Summary

    By William A. Beck

    The Construction Aggregates Corp. operates a plant for processing sand and gravel from two deposits in Ottawa County, Mich. The bulk of the sand is obtained from a sand dune on the shore of Lake Michi

    Jan 1, 1962

  • NIOSH
    RI 6042 Underground Gasification Of Coal With Oxygen-Enriched Air

    By J. P. Capp

    The Bureau of Mines conducted field-scale experiments in underground gasification of coal with oxygen-enriched air. A path about 140 feet long was linked at the rate of LO feet per day through a coalb

    Jan 1, 1962