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RI 2475 The Metallurgical Treatment of Zinc-Retort Residues
By B. M. O'Harra
The residues resulting from the retort distillation of zinc ores have from 40 to 75 per cent of the weight of the original ore and contain from 5 to 15 per cent zinc . A rough estimate indicates that
Apr 1, 1923
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RI 6737 Tin-Lode Investigations, Cape Mountain Area, Seward Peninsula, Alaska
By John J. Mulligan
The Bureau of Mines investigated the tin deposits of the Cape Mountain area during July and August 1962 to test the effectiveness of detrital-cover sampling in permafrost areas as a relatively cheap a
Jan 1, 1966
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The Effects of Water Emulsified Fuel on Diesel Particulate Matter Concentrations in Underground Mines
By L. D. Patts, J. D. Noll, S. E. Mischler, G. H. Schnakenberg
In this study, we evaluated the ambient diesel particulate matter (DPM) concentrations (at the intakes and exhausts of the mine) as the entire vehicle fleet of a stone mine switched from using 35% bio
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IC 8177 Oil Recovery By Miscible-Phase Displacement: A Bibliography ? Introduction
By L. K. Weaver
The Bureau of Mines has started an engineering study of oil recovery by miscible-phase displacement. As a preliminary part of the investigation a literature and patent study was made to prevent duplic
Jan 1, 1963
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Subsidence Prediction Using a Laminated, Boundary-Element Program
By Keith A. Heasley, Timotlly M. Barton
Historically, the surface subsidence over underground coal mines has been predicted using empirical profile or influence functions which have little or no connection to the actual mechanics of the sub
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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
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Mining And Mineral Operations In The South-Central States - A Visitor Guide ? Introduction
Minerals are vital to any industrialized civilization. Annually, the United States uses more than 4 billion tons of new mineral materials, or about 40,000 pounds per person-about half being mineral fu
Jan 1, 1977
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IC 8103 Cobalt - A Materials Survey ? Introduction And Summary
By Joseph H. Bilbrey
COBALT is a silvery gray metal which closely resembles nickel in appearance and properties although it is somewhat harder and more brittle. It is rather widely disseminated and is estimated to make up
Jan 1, 1962
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Use of Rocsil® Foam to Remotely Construct Mine Seals
By Cliff McCartney, Michael A. Trevits
The National Institute for Occupational Safety and Health (NIOSH) is conducting a program of research to evaluate and improve remote mine seal construction technology for mine fire control and suppres
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OFR-116-79 An Evaluation Of The Fire And Explosion Hazards Of Oil Shale Mining And Processing
By R. B. Crookston
Oil shales differ from coals in that they contain less carbonaceous material, convertible to volatile hydrocarbons, and more inorganic rock. In all pre-commercial oil shale development, involving exte
Jan 1, 1978
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RI 3038 Survey of Fuel Consumption at Refineries in 1929
By G. R. Hopkins
"Refiners are generally considered solely as fuel producers, but actually they also comprise a group one of the largest consumers of fuel. For example, during the year 1929 the refineries-burned 51,54
Sep 1, 1930
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Roof Screening for Underground Coal Mines: Recent Developments
By Sean Gallagher, Gene Wilson, Christopher Mark, Craig S. Compton, Gregory M. Molinda
Falls of small pieces of rock from between roof bolts continue to cause fatalities and to injure hundreds of coal miners each year. Roof screen is the most effective way to prevent these incidents, bu
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RI 3452 Studies Of Roof Movement In Coal Mines - 2. Crucible Mine Of The Crucible Fuel Co. ? Introduction (b2c06069-2efb-4770-a82c-ff6e6ca0ac43)
By E. R. Maize
This report is t e second of s series on roof movement in coal mines. The first (R. I. 3355)4/ dealt with convergence of roof and floor and movement of the surface accompanying and following extractio
Jan 1, 1939
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RI 8730 Sealing Openings in Abandoned Mines by Pneumatic Stowing
By Slavoljub D. Maksimovic
The Bureau of Mines, through a memorandum of agreement with the State of Ohio, tested a method of constructing seals in abandoned mine openings in Ohio by means of pneumatic stowing of crushed limesto
Jan 1, 1982
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IC 6982 Pumping Operations In The Cripple Creek District, Colo. - Introduction
By Jos. R. Guiteras
This paper describes the pumping operations at the Ajax, Cresson, and Vindicator dines in the Cripple Creek mining district of Colorado during the summer of 1936. At that time the three mines wore pum
Jan 1, 1937
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The Mineral Industry Of Other Central African Countries - Cameroon (b64d7e3f-2b3b-40e8-b713-920eb343c7a5)
By Suzann C. Ambrosio
Cameroon's mining industry continued to be dominated by crude petroleum. The value of petroleum output was estimated at $1 billion.2 The 1982 gross domestic product (GOP) was approximately $8.4 b
Jan 1, 1984
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OFR-15(2)-78 Evaluation Of The Application Of Repetitive Fuel/Air Explosions To Rock Ripping - Final Report - Phase II
By John W. Colburn
A tractor-integrated version of an explosive ripping system was developed for mining application. This system utilizes diesel fuel and a tractor-mounted blower supplying 30 psig compressed air to a tw
Jan 1, 1977
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The Mineral Industry Of Other Areas Of The Far East And South Asia - Bangladesh (0e11f91d-11fe-413b-9cfb-2647e57b907e)
By E. Chin
The domination of Bangladesh's mineral industry by natural gas was in for some possibly significant changes. A modest flow of crude oil was struck in a gas development well in the northeastern co
Jan 1, 1988
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RI 7424 Rock Fragmentation By Creating A Thermal Inclusion With Dielectric Heating
By K. Thirumalai
This study forms a part of Bureau of Mines continuing research on thermal fragmentation of rocks. The potential of internal heating techniques for rock fragmentation is discussed. A concept of rock fr
Jan 1, 1970
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RI 5038 Operation Of A Powdered-Coal Gasifier At Louisiana, Mo. ? Summary And Conclusions
By R. G. Dressler
The design and operation of the Koppers powdered-coal gasifier and its auxiliaries at Louisiana, Mo., are described. This unit was designed to convert 1 ton of coal per hour with oxygen and superheate
Jan 1, 1954