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  • NIOSH
    OFR-175-82 Alternative Power-Line Proximity Warning Techniques

    By Frederick H. Raab

    A power-line proximity-warning (PLPW) system must have a high probability of detection (alarm activation at a specific distance), low probability of false alarm, and minimal set-up and maintenance. Te

    Jan 1, 1982

  • NIOSH
    Mineral Indicators - Aluminum (9d52498e-cbaa-467d-bf52-eb03dc09d331)

    On November 9, the Reynolds Metals Company cut production by 12 at its primary aluminum smelters at Troutdale, Oreg., and Longview, Wash., as a result of an earlier 25% power cutback by the Bonneville

    Jan 1, 1979

  • NIOSH
    OFR-73(1)-80 Topsoil Rock Removal Technology

    By Walter W. Kaufman

    This report summarizes a study conducted to determine the state of the art of various rock removal systems and their capabilities. The objective of the study was to determine if currently manufactured

    Jan 1, 1979

  • NIOSH
    RI 9341 - Evaluation of Multitimbered Wood Crib Supports

    By Thomas M. Barczak

    Wood cribs are used extensively to stabilize openings in underground coal mines. This U.S. Bureau of Mines report describes the results of full-scale testing of several multitimbered wood crib configu

    Jan 1, 1991

  • NIOSH
    OFR-49-76 The Development Of A System To Suppress And Extinguish Fully Developed Coal Dust Explosions: Progress Report

    By L. D. Johnson

    On a project which is to develop a system to suppress coal dust explosions, a facility has been built and several devices tested. The facility is a 317-foot, 4.5-foot diameter shock tube and to date 5

    Jan 1, 1972

  • NIOSH
    International Land Reclamation And Mine Drainage Conference And Third International Conference On The Abatement Of Acidic Drainage - Volume 3 Of 4: Reclamation And Revegetation

    Mine drainage and mine reclamation are topics of major interest to the mining industry, federal and local governments, and the general public. This publication and its companion three volumes are the

    Jan 1, 1994

  • NIOSH
    RI 3505 Relationship Of Ash-Fusion Temperatures Of Coal And Coke ? Introduction (6f500829-9d2d-49ca-b0c0-4315af1a4067)

    By D. A. Reynolds

    A few studies on the relationship of the fusion temperature of the ash on coke to that of the corresponding coal have been made on commercial high-temperature cokes. H. J. Rose3/ in 1921 compared the

    Jan 1, 1940

  • NIOSH
    RI 9259 - Impact of Water Sprays on Scrubber Ventilation Effectiveness

    By Jon C. Volkwein

    The U.S. Bureau of Mines conducted a study to assess the impact of a directional water spray system on a unique single inlet dust scrubber on a low-profile mining machine. Tests were conducted in a fu

    Jan 1, 1989

  • NIOSH
    OFR-102-83 Computer Simulation Of Mining Subsidence Using The Zone Area Method - I. Introduction

    By M. Karmis

    Surface subsidence is an inevitable consequence of many underground mining operations and has been recognized as such since the fifteenth century. Damage resulting from this phenomenon ranges from sim

    Jan 1, 1983

  • NIOSH
    RI 7607 An Experiment In Seismic Holography

    By G. L. Fitzpatrick

    Preliminary results of an experiment in seismic holography indicate that the techniques of acoustical holography may be successfully used with seismic waves to determine the size and general shape of

    Jan 1, 1972

  • NIOSH
    RI 3444 Measurement Of Pressures On Rock Pillars In Underground Mines ? Part I ? Introduction

    By Leonard Obert

    The ultimate object of this investigation is to develop a method for determining the pressure, in- situ, on rock mine pillars, arches, end other mire structures. The preliminary investigations of Bure

    Jan 1, 1939

  • NIOSH
    IC 7112 Mining Of Feldspar And Associated Minerals In The Southern Black Hills Of South Dakota ? Introduction

    By Jos. R. Guiteras

    This paper is one of r series published by the Bureau of Mines dealing with the mineral resources of western South Dakota. The mining of pegmatite minerals is described mainly from the standpoint of t

    Jan 1, 1940

  • NIOSH
    IC 8796 Cost Of Producing U308 From Ammonium Bicarbonate In Situ Leach Solution By The Multiple-Compartment Ion-Exchange System

    By Masami Hayashi

    The Bureau of Mines estimated the cost for ,3 uranium ion-exchange recovery system using five grades of 17.0, leach solution producing 815,570 pounds of U 0? per year from an ammonium bicarbonate in s

    Jan 1, 1979

  • NIOSH
    OFR-6-82 Flexible Liner For Use In Advancing Tailgate

    By Kenneth C. Ko

    An engineering investigation was carried out on the technical and economic feasibility of implementing flexible liner/backpacking support systems In an advancing tailgate longwall mine. The system for

    Jan 1, 1980

  • NIOSH
    Electrostatic Separation Of Granular Materials ? Introduction

    By F. Fraas

    ELECTROSTATIC methods are used to separate and concentrate or purify granular particles derived from ores or various synthetic and agricultural products. Compared with other separation methods that re

    Jan 1, 1962

  • NIOSH
    Mineral Resources Of The Seven Blackfoot Study Area, Garfield County, Montana ? Summary

    By Michael S. Miller

    In 1984, at the request of Bureau of Land Management, the Bureau of Mines studied 8,500 acres of the 20,250-acre Seven Blackfoot Wilderness Study Area (WSA) consisting of all 3,950 acres of MT-024-657

    Jan 1, 1986

  • NIOSH
    MLA 10-81 - Mineral Resources Of The Domeland Addition (5207) And Woodpecker (5206) Rare II Areas, Tulare And Kern Counties, California

    By James M. Spear

    The U.S. Bureau of Mines conducted a mineral survey of the Domeland Addition (5207) and Woodpecker (5206) RARE II areas during the summer of 1979. These study areas were examined to determine the pres

    Jan 1, 1981

  • NIOSH
    OFR-7-74 Applicability Of Speech Bandwidth Compression Techniques In Mine Electromagnetic Communications

    By C. H. Manney

    This report deals with the feasibility of the use of vocoders as an integral part of a mine electromagnetic voice communication system. Limitations imposed by the nature of the transmission path, back

    Jan 1, 1972

  • NIOSH
    OFR-53-83 Investigation Of Extinguishing Agents For Coal Dust Explosions

    By Marcel Vanpee

    Eight extinguishing powders KCI, were tested on five types of diffusion flames. The effect of flame temperature on the inhibition efficiency was investigated by varying the oxygen index of the flame s

    Jan 1, 1982

  • NIOSH
    IC 8496 The Implications Of Urban Growth And The Minerals Industry In The Huntsville, Ala., Area

    By Donald E. Ralston

    The Huntsville study area in northeastern Alabama consists of Jackson, Limestone, Madison, and Marshall Counties. Major emphasis was placed on the Huntsville urban area in Madison County to analyze th

    Jan 1, 1970