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  • NIOSH
    RI 7954 Thermal Diffusivity of Six Igneous Rocks at Elevated Temperatures and Reduced Pressures

    By D. P. Lindroth

    The thermal diffusivity above 298 K, up to 400 K and at pressures from ambient down to 10-10 torr was measured for the following six igneous rock types: tholeiitic basalt, obsidian, rhyolite, granodio

    Jan 1, 1974

  • NIOSH
    EM Rescue (Location) System For Deep Mines Phase II - Build And Test Breadboard Equipment

    By I. D. Schleicher, L. H. Rorden, F. B. Curry, T. C. Moore

    The purpose of this program is to extend electromagnetic (EM) techniques for use in locating miners trapped in mines as deep as 1000 m. A previously developed EM system is considered adequate for use

  • 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
    IC 6871 How To Use Permissible Explosives Properly - Introduction

    By D. Harrington

    Probably over 95 percent of the coal production of the United States depends upon the use of explosives before it can be placed in the railroad car at the mine, and up to the present time it has been

    Jan 1, 1936

  • NIOSH
    Electromagnetic Theory Of Techniques For The Non-Destructive Testing Of Wire Ropes

    By David A. Hill, James R. Wait

    This report contains a summary of analytical research on electromagnetic methods of nondestructive testing of cylindrical conductors. The principal objective is to provide theoretical insight to the o

  • NIOSH
    RI 9237 - Evaluation of High-Pressure Front-Mounted Water Jets for Frictional-Ignition Suppression

    The U.S. Bureau of Mines conducted a laboratory study to determine what effect use of water-jet-assisted cutting has on frictional-ignition suppression. A single bit with a steel tip, installed on a r

    Jan 1, 1989

  • NIOSH
    Electric Shock Prevention

    By Gordon R. Sima, John L. Bennett, Roger L. King

    Electric shocks are a serious problem in the mining environment. Because of extremely wide ranging use of electrically powered equipment in the mining industry, the hazard to personnel due to electric

  • NIOSH
    RI 3215 Comparison of Methods for Determining the Friability of Coal

    By H. F. Yancey, E. Zane

    "INTRODUCTION The term ""friability"" as applied to coal may be defined as the physical property of coal which expresses its tendency to become reduced in size during handling as a result of such exte

    Jun 1, 1933

  • NIOSH
    Other Nonmetals - Asphalt (Native) (d3144cf4-d320-4865-981a-5659f7f22a8f)

    By Michael J. Potter

    Native asphalt was produced by five companies in two States, Texas and Utah. Bituminous limestone, used primarily as a paving material for street and road repair, was produced by White Uvalde Mines an

    Jan 1, 1985

  • NIOSH
    The Mineral Industry Of The Islands Of The Caribbean - Aruba

    By Ivette E. Torres

    Aruba, formerly a. part of the Netherlands Antilles, separated on January I, 1986, and became an autonomous part of the Netherlands. Full independence of the island from the Netherlands is scheduled f

    Jan 1, 1989

  • NIOSH
    RI 5496 The Nicaro (Cuba) Nickel Ores - Basic Studies, Including Differential Thermal Analysis In Controlled Atmospheres ? Summary

    By R. B. Fisher

    This report gives the results of mineralogical research on the Nicaro (Cuba) nickel ores and plant products. These studies were made under a cooperative agreement with the General Services Administrat

    Jan 1, 1959

  • NIOSH
    RI 9660 - Evaluation Of Systems To Monitor Blind Areas Behind Trucks Used In Road Construction And Maintenance: Phase 1

    By Todd M. Ruff

    The majority of fatalities that occur in road construction work zones in the United States involve a worker being struck by a piece of construction equipment or other vehicle. The Spokane Research La

    Jan 1, 2004

  • NIOSH
    RI 7800 Degasification Of Virgin Pittsburgh Coalbed Through A Large Borehole (6080190f-0d98-45f0-83dd-b714a20ad923)

    By H. H. Fields

    The Bureau of Mines is in the process of degasifying a virgin area in northern West Virginia from the base of an 839-foot-deep vertical borehole¬. An in situ gas pressure hole 199 feet long, and seven

    Jan 1, 1973

  • NIOSH
    RI 7145 High-Purity Vanadium By Metallothermic Reduction Of Vanadium Trichloride

    By M. J. Ferrante

    The preparation and subsequent reduction of vanadium trichloride was investigated as a process for the production of high-purity vanadium metal. Chlorine was reacted with vanadium oxide in the presenc

    Jan 1, 1968

  • NIOSH
    IC 8214 Mining Methods And Costs, Kimballton Limestone Mine, Standard Lime And Cement Co., Giles County, Va.

    By N. A. Eilertsen

    Procedures of mining high-calcium limestone underground at the Kimballton mine of the Standard Lime and Cement Co. in Giles County, west-central Virginia, are described. Drilling and blasting procedur

    Jan 1, 1964

  • NIOSH
    RI 7168 Investigation Of Operating Variables In The Attrition Grinding Process

    By Martin H. Stanczyk

    Bench scale, laboratory batch attrition grinding tests were made of a coarse commercial kaolin in a stainless steel, 5-inch-diameter attrition grinding machine to study the effect of a number of basic

    Jan 1, 1968

  • NIOSH
    RI 7055 Lightweight Aggregates - Expansion Properties Of Selected Michigan Shales

    By James H. Aase

    Shales from 10 locations in Michigan were sampled, tested, and evaluated to determine their suitability as raw materials for producing lightweight aggregate by rotary-kiln methods. Sampling procedures

    Jan 1, 1967

  • NIOSH
    IC 8002 Methods For Producing Secondary Copper ? Introduction And Summary

    By Max J. Spendlove

    The secondary copper industry is comprised of numerous enterprises which collectively employ many of the recovery and refining processes now used in primary plants as well as many other processes that

    Jan 1, 1961

  • NIOSH
    RI 5991 Investigation Of Mercury-Antimony Deposits Near Flat, Yukon River Region, Alaska ? Summary And Introduction

    By R. P. Maloney

    Since mining operations began in 1900, Government geologists and mining men have periodically recorded the presence of the minerals of mercury and antimony in the extensive gold placer deposits near F

    Jan 1, 1962

  • NIOSH
    RI 3105 Flotation of Low-Grade Phosphate Ores II.

    By H. M. Lawrence, E. Roca

    "INTRODUCTION Of the phosphate rock deposits of the United States that are being exploited actively at present, the land-pebble area in Florida is the largest producer. In recent years the land-pebble

    Aug 1, 1931