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IC 8742 Underground Mine Communications (In Four Parts) 1. Mine Telephone Systems
This Bureau of Mines report is devoted to descriptions of systems that provide in-mine wired telephone service. Although they may incorporate other features, each system described functions to allow o
Jan 1, 1977
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IC 9415 Network Flow Model Analysis Of The Impact Of Chlorofluorocarbon Phaseout On Acid-Grade Fluorspar
By Jennifer A. Slatnick
Chlorofluorocarbons (CFC's), once universally accepted as ideal compounds for use in cooling and refrigeration, in foam production, and in cleaning electronic components, are being phased out and
Jan 1, 1994
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Mineral Commodity Summaries 1980 - An Up-To-Date Summary Of 91 Mineral Commodities ? Aluminum
1. Domestic Production and Use: In 1979, 12 companies operated 32 primary aluminum reduction plants, with 3 firms accounting for 64% of production. Washington, Oregon and Montana accounted for 32% of
Jan 1, 1980
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OFR-93-77 Application Study Of Portable Underground Hardrock Crushers
By Carl R. Peterson
[In lTI n,v und I'gr'oun nllnin~ Opt'I'ali n' the high . t cost is the loading and I 3ulage of t tln-of -D"'line ot'. 01' hauling costs can be r duced signifi-c
Jan 1, 1976
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RI 4459 Physical Properties Of Mine Rock Part I
By S. L. Windes
This report presents a tabulation of the physical and petrographic properties of Over 100 rock types from operating mines or mineral-investigation projects. The physical properties include the followi
Jan 1, 1949
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Bulletin 185 Pennsylvania Mining Statutes Annotated
By J. W. Thompson
That the governor is hereby authorized to appoint a commission of seven persons, to be known as the industrial accidents commission-two of whom shall be employers of labor, two of whom shall be employ
Jan 1, 1920
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IC 7805 Bibliography On Extractive Metallurgy Of Nickel And Cobalt, January 1929-July 1955 ? Introduction And Summary
By R. B. Bauder
In connection with a Bureau of Mines research program on utilization of Cuban lateritic ores, a comprehensive review was made of the chemical literature on nickel and cobalt. Initially, the review had
Jan 1, 1957
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OFR-93-79 Development Of Lightweight Mine Roof Supports
By S. K. R. Iyengar
This report presents the results of a study to develop optimal designs for light-weight mine roof supports for use in underground coal mines. A load capacity of 196 kN (22 tons) and a height adjustabl
Jan 1, 1978
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RI 6986 Projectile Impact Initiation of Condensed Explosives
By Elton L. Litchfield, Milton L. Weiss
Studies were made on the projectile impact sensitivity of explosives by subjecting explosive samples to the impact of metal projectiles fired from a 0.50- caliber gun . The projectiles , in the form o
Jan 1, 1965
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OFR-18-80 Evaluation Of Surface Mining Blasting Procedures ? 1.0 Summary
An evaluation of blasting procedures in surface mining operations was undertaken to determine means for improving safety. The objectives of the study were to: 1. Develop guidelines for safer blasti
Jan 1, 1977
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RI 9467 - Improved 6.8L Furnace for Measuring the Autoignition Temperatures of Dust Clouds
By Ronald S. Conti
A new U.S. Bureau of Mines 6.8-L ignitability furnace was used to study the thermal autoignitability of dust clouds. This furnace has a quartz window to allow observation of the early stages of the ig
Jan 1, 2010
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OFR-12-75 Impact Of Higher Ecological Costs On Surface Mining
By W. E. Foreman
A mathematical model was developed to assess the costs for reclamation of surface mining using the shovel overcasting operation, the front end loader operation, and a backfilling operation. A literat
Jan 1, 1974
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OFR-52-86 Financing Foreign Development Of Non-Fuel Mineral Resources: An Analysis Of Loan Terms Of International Financial Institutions Vs. Those Of Commercial Banks ? Final Report ? Executive Summary
This report presents the results of a study for the Bureau of Mines to compare loan terms for non-fuel mineral projects in developing countries, from various International Financial Institutions (IFIs
Jan 1, 1986
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OFR-122(5)-78 Advancing Oil Shale Mining Technology: Program Evaluation - Economic Mine Models
By G. F. Kuncir
This volume was prepared in support of an evaluation of the Advancing Oil Shale Mining Technology Program performed by The Aerospace Corporation under a Bureau of Mines contract. The evaluation is des
Jan 1, 1977
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OFR-123-76 Evaluation Of Underground Conventional Mining Equipment
By William J. Douglas
This document describes the development of a conventional mining equipment data base, and an approach for conducting industrial engineering studies of arbitrary mining systems employing network techni
Jan 1, 1976
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RI 3711 Increasing Pig Iron Output Through Improved Coke
By L. D. Schmidt, W. C. Schroeder, A. C. Fieldner
"INTRODUCTION The highly mechanized character of modern warfare makes steel the most vital raw material. The shortage of steel scrap in the United States is forcing the use of increased quantities of
May 1, 1943
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RI 4848 Concentration Of Oxide Manganese Ores From Vicinity Of Winkelman, Pinal County, Ariz.
By K. C. Dean
During the course of the investigation of manganese mineral occurrences in the western United States, the Bureau of Mines collected several lots of ore' from properties in the vicinity of Winkelm
Jan 1, 1952
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RI 4126 Recovery of Soda and Removal of Sulfate in the Lime-Soda Process for Alumina Production
By Francis J. Fratttali, Verda McLendon, Stanley J. Green
"INTRODUCTION During the first phases of the war emergency the shortage of aluminum prompoted the Bureau of Mines to investigate methods for using low-grade bauxites of high silica content and also cl
Sep 1, 1947
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Introduction (b812f6a7-161c-4f41-87f7-eb34a74efe72)
The wealth of a nation can be measured many ways, but one of the most important measures is its natural resources, particularly minerals. Minerals provide the foundation upon which economic prosperity
Jan 1, 1990
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American Lignites: Geological Occurrence, Petrographic Composition, And Extractable Waxes ? Introduction
By W. A. Selvig
EQUIREMENTS of montan wax for industrial use in the United States before World War II were met by imports, nearly all of which came from Germany. An important industry for extraction and refinement of
Jan 1, 1950