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  • NIOSH
    RI 3662 Lamallar Grading of Powdered Mica

    By Oliver C. Ralston, Foster Fraas

    "INTRODUCTION The predominant characteristic of powdered mica is the thin -plate shape of the particulars, and the thinner the plates, the more enhanced is this characteristic. Consequently, it is fre

    Sep 1, 1942

  • NIOSH
    RI 5304 Cementation Of Bituminous-Coal-Mine Roof Strata - Part 1. - Determining Penetrability Of Mine Roof By Injecting Oil And Water ? Introduction

    By Earl R. Maize

    This is the first of a series of reports dealing with development of a method of strengthening bituminous-coal-mine roof. Later reports will describe the progress made with injecting high cohesive and

    Jan 1, 1957

  • NIOSH
    RI 6770 A Streak Camera Method For Measuring Dynamic Equation Of State Properties Of Rock

    By Lippe D. Sadwin

    A high-speed streak camera method for making equation of state measurements (shock and particle velocities) on samples of rock under dynamic load conditions is described. Experimental data are given f

    Jan 1, 1966

  • NIOSH
    IC 8687 Building Stoppings In Mines With Large Openings

    By Edward D. Thimons

    The Bureau of Mines conducted a state-of-the-art study of techniques currently employed to close large openings in underground mines. A large opening was considered to be any opening over 10 feet high

    Jan 1, 1975

  • NIOSH
    RI 9640 - A Second-Generation Remote Optical Methanometer

    By John C. Edwards, Gene F. Friel, John J. Opferman, Robert A. Franks

    As the use of deep -rut mining increases, there - expected to be a greater demand for methane (CH,) measurement devices capable of scanning working faces al depths in excess of 10 m to alert mine pers

    Jan 5, 1997

  • NIOSH
    RI 3174 Properties Of Crude Oil From The Greasewood Flat Area In Colorado (b67dbf0f-55f5-422f-9031-cb88fa456975)

    By H. P. Rue

    The Bureau of Mines has recently collected two samples of crude oil from wells in the Greasewood Flat, area of northeastern Colorado. Sample 31310 was taken from the Continental Oi1 Co.'s well B

    Jan 1, 1932

  • NIOSH
    RI 9587 - A Kinetic Model for Conventional Flotation of Coal

    By Frank J. Susko

    The U.S. Bureau of Mines has developed a computer model to describe a flotation process. Coal data from conventional flotation has been converted to a simple, two-parameter kinetic model developed by

    Jan 1, 2010

  • NIOSH
    RI 5861 Preparation Of Tungsten By Reduction Of Tungsten Hexachloride - Summary

    By P. C. Good

    The work reported here was undertaken by the Federal Bureau of Mines to investigate new methods of preparing high-purity metal. Tungsten hexachloride was prepared by direct chlorination of scrap tungs

    Jan 1, 1961

  • NIOSH
    Toxic Products From Burning Of Fire-Resistant Materials

    By Allan F. Smith

    The Bureau of Mines studied toxic products produced by burning eight fire-resistant mines conveyor belts, a brattice cloth, and an electrical cable insulation obtained from laboratory-scale burning ex

    Jan 1, 1973

  • NIOSH
    RI 2356 The Tannic Acid Method For The Quantitative Determination Of Carbon Monoxide In The Blood

    By R. R. Sayers

    carbon monoxide mav occur in many places and inhalation of that insidious s is a. frequent and .videly distributed cause of poisoning, ranging in severity from headache and. inefficiency to unconscio

    May 1, 1922

  • NIOSH
    RI 2927 A New Type Of Laboratory Dust-Explosion Apparatus

    By C. M. Bouton

    Although much valuable work has been done in the study of dust explosions, the laboratory technique has not been developed to the point where the many factors involved can be properly controlled, and

    Jan 1, 1929

  • NIOSH
    RI 7941 Tube-Wall Methanation Reactors With Combined Diffusion and Kinetic Resistance

    By T. D. Ralston

    This Bureau of Mines report presents a mathematical model for heterogeneously catalyzed chemical reactors operating under turbulent conditions. The model includes reaction kinetics on the catalyst sur

    Jan 1, 1974

  • NIOSH
    RI 7029 Design And Development Of A Lightweight Recoverable Hydraulic Prop

    By Webster S. Anderson

    The design, development, and testing of hydraulic props to provide a lightweight, high strength, recoverable unit is described. Modifications in design incorporating threaded components resulted in th

    Jan 1, 1967

  • NIOSH
    Head-Trunk Motion Increase With Arm-Rest Controls - Introduction

    By N. Grosland, G. Kopp, L. Frey-Law, D. Wilder, M. Contratto, S. Rahmatalla, T. Xia

    Heavy equipment manufacturers have made a long-term commitment to minimize operator vibration exposure for comfort, performance, and health reasons. Domestic and international guidelines/standards an

    Jan 6, 2006

  • NIOSH
    Carbon Monoxide Fixed Point Continuous Monitor - Objective

    Provide an instrument for continuous remote monitoring of carbon monoxide concentration in underground mines. Approach A carbon monoxide fixed? point continuous monitor consists of two modules. A

    Jan 1, 1981

  • NIOSH
    RI 7953 Aqueous Reduction of Chalcopyrite Concentrate With Metals

    By M. B. Shirts

    Bench-scale studies were made on a reductive hydrometallurgical procedure to convert chalcopyrite flotation concentrate to copper metal or a readily leachable sulfide. Reductive conversion of chalcopy

    Jan 1, 1974

  • NIOSH
    Technology News - No. 476 - Instrumented King Wire for Monitoring Cable Bolts

    Objective A cable bolt can be a strain-measuring device as well as a supporting device in underground mines. Placing instruments on a cable bolt allows certain characteristics of a rock mass, such

    Nov 1, 1998

  • NIOSH
    Evaluation Of Engineering Noise Controls For A Continuous Miner Conveyer System

    By Peter Kovalchik, Ed Kwait, T. Michael Durr

    1. BACKGROUND Many research projects on engineering controls for noise reduction in mining were conducted by the former U.S. Bureau of Mines, mostly under contracts from 1972 through 1986.1 Contra

  • NIOSH
    RI 9444 - Longwall Retreat of Gate Road Pillars (c7601020-d513-40cf-aea6-4d0a1eaae1e8)

    This report describes a U.S. Bureau of Mines investigation into the removal of gate road chain pillars in conjunction with longwall retreat mining. The research objective was to determine, through eva

    Jan 1, 2010

  • NIOSH
    Reducing Respirable Dust Exposure of Workers using an Improved Clothes Cleaning Process

    By Andrew D. O. O’Brien, Linda J. McWilliams, Joe L. Howell, Douglas E. Pollock, Jeanne A. Zimmer, Andrew B. Cecala

    A quick, safe, and effective method has been developed that allows workers to clean their dust laden work clothing periodically throughout the day. For the mining industry, this technique is much more