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RI 5408 Strength Of Steel Roof Bolts After Repeated Bending ? Summary And IntroductionBy Frank L. Gaddy
In this report, a description of mine practices, the preparation of roof bolts for laboratory experiments, the results of tensile-strength determinations, and a discussion of results of these tests ar
Jan 1, 1958
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IC 7334 Method Of Handling Hydrogen Sulfide Gas In The Elk Basin Oil Field Of Wyoming - IntroductionBy J. H. East
The occurrence of hydrogen sulfide in the gas in solution in the oil produced from the Tensleep sandstone in the Elk Basin oil field in Wyoming constitutes a serious hazard to persons working in, that
Jan 1, 1945
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RI 4050 Bozeman Corundum Deposit, Gallatin County, MontanaBy John Taber, Robert D. O'Brien
"INTRODUCTION The Bozeman corundum deposit was first examined in May 1944 by an engineer of the Bureau of Mines. In August 1944, the property was re-examined because of a sharply increased war demand
May 1, 1947
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RI 2473 Globe-Miami Mine Rescue ManueversBy E. D. Gardner
"A fire hazard exists in nearly all mines. Progressive mining companies recognize this danger and take all possible precautions to prevent any conflagrations, but in spite of such safety measures, min
May 1, 1923
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IC 6159 Method And Cost Of Mining At Barr Mine Tri-State Zinc And Lead District ? IntroductionBy Oliver W. Keener
The operation described herein differs from the usual practice in the Tri-State district in two important respects: (1) the ore is loaded into cars which are tramped to the shaft and hoisted on self-d
Jan 1, 1929
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RI 2140 MicaBy Oliver Bowles
"A Product from Mica Mines.Mica commonly occurs in pegmatites which consist of large crystals of feldspar and quartz, mica constituting but a small proportion of the total rockMuch of the feldspar thu
Jun 1, 1920
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RI 2615 Sand Blast SandBy W. M. Weigel
"Sand is one of the commonest materials for industrial use, not only as a building material, but in many industrial processes. The general name applies to all grades, from the comparatively impure, un
Jun 1, 1924
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RI 6663 Heat Of Formation Of Tantalum CarbideBy Alla D. Mah
The heat of combustion of TaC0.996 was determined by oxygen bomb calorimetry to be -302.8 ±0.4 kcal/mole. The corresponding heat of formation of TaC0.996 is -35.4 ±0.5 kcal/mole, and the calculated he
Jan 1, 1965
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RI 8665 - Probability of Encountering Coalbed Discontinuities During Vertical and Horizontal Borehole DrillingBy David W. Houseknecht
Probabilities of encountering coalbed discontinuities during vertical or horizontal drilling in a specific coalbed can be estimated based on analysis of mined-out areas of the coalbed where the size,
Jan 1, 1982
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IC 6581 Methods And Costs Of Mining And Preparing Sand And Gravel At The Clowdy Plant Of The Dallas Washed And Screened Gravel Co., Dallas, Tex. ? IntroductionBy Ralph L. Windrow
This paper is one of a series being prepared for and published by the United States Bureau of Mines describing methods and costs of mining and preparing sand and gravel for market at various plants th
Jan 1, 1932
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RI 3085 Separation Of Cyanite And Mica From Quartz, Feldspar. And Other Gangue Minerals Of A Mica SchistBy F. F. Hintze
In the group of minerals used in making this study, the cyanite is associated with quartz, mica, and feldspar in the schist. The amount of quartz is variable, but it is always an abundant mineral. Bot
Jan 1, 1931
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CFD modeling of spontaneous heating in a large-scale coal chamberBy Liming Yuan
Three-dimensional computational fluid dynamics (CFD) modeling is conducted to simulate spontaneous heating in a large-scale coal chamber with a forced ventilation system. Spontaneous heating is modele
Jan 1, 2009
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RI 3293 Benzene In Natural GasBy H. H. Schrenk
[A colorimetric method5/ for the determination of benzene in amounts as low as 0.001 mg has been developed recently at the U.S. Bureau of Mines Pittsburgh Experiment Station by the authors, with the a
Jan 1, 1935
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RI 6805 Electrolyte Life In Winning Tungsten From ScheeliteBy John M. Gomes
In the repetitive electrowinning of tungsten from scheelite, the calcium impurity buildup in the molten electrolyte results in decreased metal purity, metal recovery, and current efficiency. Periodic
Jan 1, 1966
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Bulletin 49 Smoke Abatement and City Smoke OrdinancesBy Samuel B. Flagg
The Bureau of Mines is endeavoring to ascertain how mineral fuels in which the Government has a direct interest, by ownership or use, can be utilized with highest efficiency. For this reason the burea
Jan 1, 1912
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RI 4061 Technique of Surveying Diamond-Drill Holes with the Wright Radiolite Borehole-Surveying InstrumentBy James W. Townsend, William H. King
"INTRODUCTION As a byproduct of its mineral investigation program, the Bureau of Mines has developed a number of operating devices and techniques worthy of note. This paper, prepared under the direct
May 1, 1947
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RI 4615 Preliminary Tests Of Gold And Zinc Ores From Buzzard Mine, Placerville, Calif.By A. L. Engel
As a part of the program of the Rare and. Precious Metals Experiment Station, Reno, Nev., in connection with investigations of treatment methods for precious and precious-base metal ores, to further c
Jan 1, 1949
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RI 2250 Petroleum Production in South America with Relation to Recent Petroleum LegislationBy J. W. Thompson
"The recent discovery and exploitation of petroleum territory have resulted in the enactment of new petroleum laws in most of the South American Republics. The activities in the discovery of these new
May 1, 1921
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IC 7720 Memorial Stone - IntroductionBy Oliver Bowles
From the most remote periods of civilization stone has been used to perpetuate the memory of individuals or to immortalize their noble achievements. Ancient memorials ranged from simple piles of stone
Jan 1, 1955
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RI 5758 Electrorefining Zirconium ? SummaryBy D. H. Baker
These investigations were conducted to determine the feasibility of molten salt electrorefining of zirconium scrap, offgrade sponge, and alloys under contract number AT(11-1)-475 between the Atomic En
Jan 1, 1961