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OFR-18-73 Investigation Of Requirements And Performance Of Safety Catches On Wire-Rope-Suspended, Man-Carrying Conveyances In United States Coal Mines
By C. H. Larsen
The results of a comprehensive investigation of conveyance arrestment devices (safety catches) in United States coal mines are presented. Availability and use, performance, inspection, maintenance, te
Jan 1, 1972
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Our Government's Stifling Excesses
By R. E. Murray
"It is a gloomy moment in the history of our country. Not in the lifetime of most men has there been so much grave and deep apprehension; never has the future seemed so incalculable as at this time. T
Jan 1, 1980
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Comparing Drilling Patterns for Coal Reserve Assessment
The criterion for assessing the accuracy of coal reserve estimates proposed by Philip and Watson (1982) is criticized.Following Royle (1977), it is suggested that the global estimation variance found
Jan 1, 1983
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Annual Review 2015 Mining Review
By J. A. Ober
"In 2015, the estimated value of nonfuel mineral production in the United States decreased by 3 percent from that in 2014 (Table 1), mainly as a result of decreased metal and metallic mineral prices,
May 1, 2016
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OFR-74-78 Waveform Generator-Package And Receiver (Mancarried And Helicopter Receiver Portion) (d0ba41ae-0b3f-47f3-9920-d3b1a270d5e4)
By Charles Anema
The Mancarried and Helicopter Receivers were developed under the contract for trapped miner location. This program was a five phase program with 15 mancarried and 5 helicopter production receivers del
Jan 1, 1976
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Lithologic Controls On Subsidence
By Jr. Abel
Subsidence is controlled by a complex combination of mining and geologic factors. For example, a world-wide compilation of data shows that, as the percentage of shale in the overying rock mass decreas
Jan 1, 1980
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Bulletin 213 Talc and Soapstone Their Mining Milling Products and Uses
By Raymond B. Ladoo
Talc is a hydrous magnesium silicate having the chemical formula H2Mg3 (SiO8 ) 4 ; it is often called steatite, soapstone or potstorie, and by the trade names talc clay, agalite, asbestine, and verdol
Jan 1, 1923
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Los parámetros mineros en el primer bimestre de 2017 y las perspectivas para el corto plazo
By Amado Yataco
El presente texto describe un cuadro comparativo sobre la producción minera comprendida entre el período de enero-febrero 2017 y 2016. En este se observa un déficit reiterativo en oro, plata, plomo y
May 1, 2017
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OFR-40-72 Research In Advanced Power Systems For Mining Health And Safety
By E. S. Chalpin
On 25 August 1971, the U.S. Bureau of Mines contracted with the Aerojet Liquid Rocket Company to perform an engineering research program to be completed on 25 May 1972. The program objective was to ev
Jan 1, 1972
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Austenite And Austenitic Steels
By John Mathews
IT is a great honor to be asked by. the Board of Directors of this Institute to deliver the Henry Marion Howe lecture. The invitation carries with it a great responsibility, which I accept with consid
Jan 4, 1925
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OFR-158-83 Develop Data For Review Of Metal And Non-Metal Mine Methane Hazard Classification
By Alastair M. Lumsden
A study was initiated to examine the ways in which a number of foreign countries classify and regulate metal/non-metal mines which experience problems due to naturally-occurring flammable gases. Twent
Jan 1, 1983
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Bulletin 115 Coal-Mine Fatilities in the United States
By Albert H. Fay
The first data compiled by the Bureau of Mines relating to coal- mine accidents in the United States were published in Bulletin 69," in which the total fatalities by years and States were tabulated fr
Jan 1, 1916
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Emplacement Features of Cupriferous Noritoids in the Okiep Copper District, Namaqualand, South Africa
By Michael K. Watkeys, Charlesworth. E. GUY, Jacobus E. Potgieter, Anhaeusser. Carl R., Roger L. Gibson, Alexander F. M. Kisters
Abstract - Intrusive features of cupriferous noritoids from the deeply eroded Proterozoic granite-gneiss terrane of the Okiep Copper District in South Africa illustrate the emplacement of basic magmas
Jan 1, 1994
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Preparing and Recording Samples for Use in Technical Assay-Laboratories
By Louis D. Huntoon
AFTER the completion, in 1905, of the Hammond Mining and Metallurgical Laboratory of the Sheffield Scientific School, Yale University, it became necessary to secure and assay a large assortment of ore
Nov 1, 1909
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IC 8913 Dolomite Refractories, And Their Potential As Substitutes For Imported Chromite
By Timothy A. Clancy
To help reduce the Nation's dependence on imported chromite, the Bureau of Mines is conducting research on the use of dolomites as an alternate material. Dolomite is a plentiful domestic resource
Jan 1, 1983
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RI 4776 The Oil-Shale Industries Of Europe
By Boyd Guthrie
As the American petroleum industry surveyed its position in early 1937, it had many reasons to be optimistic concerning its future. The industry had emerged successfully from the depression, and for t
Jan 1, 1951
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Strain Distribution in the Bending-Under-Tension Test
By D. K. Uko
In the stretch-bend or bending-under-tension test, a strip is rigidly clamped and restrained at each end and bent by central transverse loading using a radiused punch: The strip deflection at failure
Jan 1, 1977
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RI 7221 Beneficiation Of Titanium Chlorination Residues - Preliminary Study
By C. C. Merrill
The Bureau of Mines beneficiated the wastes generated by commercial titanium chlorination operations to reclaim metal values and reduce the problem of disposing of solid wastes. A water leach solubili
Jan 1, 1969
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Stress control methods help to optimize underground mine design
By Mark Lawshe, Shosie Serata
The conventional method of mining underground, using narrow rooms and wide pillars, has proven to be poorly adapted to the powerful earth forces that act on underground openings. The high costs of roo
Jan 1, 1989
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Washington Paper - Biographical Notice of Thomas Egleston, Ph.D., LL.D.
By George F. Kunz
Jan 1, 1902