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Coal Beds In Central Part; Reserves; Petrographic And Chemical Characteristics Of Coals; Stratigraphy Of Area ? MapsMaps To Accompany Bulletin 507
Jan 1, 1952
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RI 5440 Hardness Testing Of Titanium Sponge: Equipment And Procedure - Summary And IntroductionBy D. H. Baker
THIS REPORT presents the technique and equipment used in determining the hardness of titanium sponge. Detailed descriptions are given of the methods used in preparing test samples for chemical analysi
Jan 1, 1959
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IC 6264 Elecytrical Blasting Practice at Some Coal Mines in the State of WashingtonBy S. H. Ash
As part of the work done at the Washington coal mines during the year 1929 , a study was made of the safety practices in and about the mines . Inasmuch as electrical blasting has made considerable hea
Apr 1, 1930
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RI 7803 Smog Chamber Reactivities Of Emissions From Leaded And Lead-Free FuelsBy G. P. Sturm
This work was undertaken by the Bureau of Mines in cooperation with the Environmental Protection Agency to determine photochemical specific reactivities of emissions from automobiles using leaded-prem
Jan 1, 1973
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Oxygenated Radical Formation by Fresh Quartz Dust in a Cell-Free Aqueous Medium and Its Inhibition by ScavengersBy X. Shi, V. Vallyathan, N. S. Dalai
"Using. ESR spin trapping methodology, evidence was obtained that fresh quartz dust in a cell-free aqueous medium generated hydroxyl - and possibly superoxide radicals. The hydroxyl radical generation
Jan 1, 1988
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RI 8392 Forecasting Methane Hazards in Metal and Nonmetal Mines (8a64cc03-8bbb-431a-a564-48ff68548975)By Edward D. Thimons
Because of the high number of accidental methane gas ignitions in metal and nonmetal mines, the Bureau of Mines searched for a simple guideline that would allow mine personnel to evaluate the methane
Jan 1, 1979
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RI 7062 Optical Properties Of Glass: Transmission Losses Of Eyepieces Used In Mine EnvironmentBy C. Gary Reiness
A safety glass eyepiece which had been repeatedly exposed to mine environment over a number of years was studied to determine some of its optical properties. In the regions from 385 to 400 mµ and from
Jan 1, 1968
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RI 3030 Test Of Ampoules Filled With Palladium Salt Solution For Detecting Carbon Monoxide (656cf8d2-6c77-4613-be74-972e917672dd)By L. B. Berger
In this investigation, the ampoule type of carbon-monoxide (CO) detector which is manufactured under license of U. S. Patent 1,644,014 (October 4, 1927) was tested for sensitivity and reliability. Thi
Jan 1, 1930
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Do Silicon-Based Radicals Play a Role in Quartz-Induced Hemolysis and Fibrogenicity?By N. S. Dalal, X. Shi, V. Vallyathan
"Correlated spectroscopic and cytotoxicity measurements were made on newly crushed silica to find whether the fracture-induced, silicon related (Si-0· or Si· type) free radicals play a direct role in
Jan 1, 1988
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RI 6635 Extraction Of Tantalum And Columbium From Ores And Concentrates By ChlorinationBy S. L. May
Tantalum and columbium can be extracted from several of their ores or concentrates by chlorination procedures. Direct chlorination of high-grade minerals in the presence of carbon at temperatures betw
Jan 1, 1965
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IC 9500 - Explosion Pressure Design Criteria For New Seals In U.S. Coal Mines - Executive SummaryBy Jürgen F. Brune, R. Karl Zipf, Michael J. Sapko
Seals are barriers constructed in underground coal mines throughout the United States to isolate abandoned mining panels or groups of panels from the active workings. Historically, mining regulations
Jan 7, 2007
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RI 5729 Beneficiating Spodumene From Pegmatites Of Gaston County, N. C. ? Introduction And SummaryBy James S. Browning
The purpose of this investigation was to develop a dependable and economic method for recovering spodumene and mica from pegmatites of the type found in Gaston County, N. C. Laboratory batch tests
Jan 1, 1961
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Experimental Studies on ·Dust Dispersion in Mine Airways (a8529981-77ab-4f9b-bf87-a1fbec505930)By R. V. Ramani, R. A. Jankowski, R. Bhaskar
"The spatial distribution of airborne dusts, deposition of dust in the airway, as well as the effect of airflow velocity and particle density on dust behavior in mine airways were studied in a set of
Aug 31, 1989
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New Pallet Loading System Lowers Worker's Dust Exposure And Improves Bag Stacking Process ? ObjectiveLower workers' dust exposures during bag stacking while ergonomically improving the bag stacking process. Approach Install a new pallet loading dust control system which uses a push-pull ve
Jan 1, 1989
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RI 7870 Influence of Manganese Additions Upon Properties of Iron Ore PelletsBy R. B. Schluter
The objective of this Bureau of Mines investigation was to determine the effects of adding manganese compounds and ores to iron ore pellets. Manganese dioxide, carbonate, sulfate and chloride, plus si
Jan 1, 1974
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RI 8158 - Seismic Detection Of Trapped Miners Using In-Mine GeophonesBy Richard A. Watson, James A. Powell
A seismic system which utilizes in-mine geophones to detect trapped miners has been developed. Tests at the Bureau of Mines Safety Research Mine at Bruceton, Pa., and at two operating mines indicate s
Jan 1, 1976
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MLA 48-85 - Mineral Resources Of The Battle Creek Wilderness Study Area, Owyhee County, Idaho ? SummaryBy Richard A. Winters
The 31,880-acre Battle Creek Wilderness Study Area (WSA) was evaluated for mineral resources by the U.S. Bureau of Mines in 1984. No mining district is in the area, nor were any mines or claims record
Jan 1, 1985
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Fourth-Quarter 1987 National Economic Activity And First-Quarter 1988 Outlook - Fourth Quarter And 1987 SynopsisBy Keith L. Harris
Real gross national product3 (GNP) grew at a seasonally adjusted annual rate of 4.2% in the fourth quarter compared with a revised 4.3% rate in the third quarter, according to the most recent estimate
Jan 1, 1988
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RI 8192 Locating Miners in Smoke-Filled Mine Openings With Infrared ImagersBy Raymond M. Stateham
Calculations based on data obtained from measurements of smoke from coal-fired powerplants predict that infrared imagers will be useful tools for smoke vision. Infrared imagers operating in the 3-to 5
Jan 1, 1976
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RI 9398 - Predicting Materials' Ease Of Combustion: Development Of A Simple Test MethodBy Maria I. De Rosa
The U.S. Bureau of Mines conducted experiments for predicting materials' ease of combustion (smoldering onset, smoldering, flaming, and decomposition rates) by means of submicrometer smoke partic
Jan 1, 2010