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RI 3662 Lamallar Grading of Powdered MicaBy Oliver C. Ralston, Foster Fraas
"INTRODUCTION The predominant characteristic of powdered mica is the thin -plate shape of the particulars, and the thinner the plates, the more enhanced is this characteristic. Consequently, it is fre
Sep 1, 1942
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RI 5304 Cementation Of Bituminous-Coal-Mine Roof Strata - Part 1. - Determining Penetrability Of Mine Roof By Injecting Oil And Water ? IntroductionBy Earl R. Maize
This is the first of a series of reports dealing with development of a method of strengthening bituminous-coal-mine roof. Later reports will describe the progress made with injecting high cohesive and
Jan 1, 1957
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RI 6770 A Streak Camera Method For Measuring Dynamic Equation Of State Properties Of RockBy Lippe D. Sadwin
A high-speed streak camera method for making equation of state measurements (shock and particle velocities) on samples of rock under dynamic load conditions is described. Experimental data are given f
Jan 1, 1966
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IC 8687 Building Stoppings In Mines With Large OpeningsBy Edward D. Thimons
The Bureau of Mines conducted a state-of-the-art study of techniques currently employed to close large openings in underground mines. A large opening was considered to be any opening over 10 feet high
Jan 1, 1975
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RI 9640 - A Second-Generation Remote Optical MethanometerBy John C. Edwards, Gene F. Friel, John J. Opferman, Robert A. Franks
As the use of deep -rut mining increases, there - expected to be a greater demand for methane (CH,) measurement devices capable of scanning working faces al depths in excess of 10 m to alert mine pers
Jan 5, 1997
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RI 3174 Properties Of Crude Oil From The Greasewood Flat Area In Colorado (b67dbf0f-55f5-422f-9031-cb88fa456975)By H. P. Rue
The Bureau of Mines has recently collected two samples of crude oil from wells in the Greasewood Flat, area of northeastern Colorado. Sample 31310 was taken from the Continental Oi1 Co.'s well B
Jan 1, 1932
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RI 9587 - A Kinetic Model for Conventional Flotation of CoalBy Frank J. Susko
The U.S. Bureau of Mines has developed a computer model to describe a flotation process. Coal data from conventional flotation has been converted to a simple, two-parameter kinetic model developed by
Jan 1, 2010
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RI 5861 Preparation Of Tungsten By Reduction Of Tungsten Hexachloride - SummaryBy P. C. Good
The work reported here was undertaken by the Federal Bureau of Mines to investigate new methods of preparing high-purity metal. Tungsten hexachloride was prepared by direct chlorination of scrap tungs
Jan 1, 1961
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Toxic Products From Burning Of Fire-Resistant MaterialsBy Allan F. Smith
The Bureau of Mines studied toxic products produced by burning eight fire-resistant mines conveyor belts, a brattice cloth, and an electrical cable insulation obtained from laboratory-scale burning ex
Jan 1, 1973
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RI 2356 The Tannic Acid Method For The Quantitative Determination Of Carbon Monoxide In The BloodBy R. R. Sayers
carbon monoxide mav occur in many places and inhalation of that insidious s is a. frequent and .videly distributed cause of poisoning, ranging in severity from headache and. inefficiency to unconscio
May 1, 1922
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RI 2927 A New Type Of Laboratory Dust-Explosion ApparatusBy C. M. Bouton
Although much valuable work has been done in the study of dust explosions, the laboratory technique has not been developed to the point where the many factors involved can be properly controlled, and
Jan 1, 1929
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RI 7941 Tube-Wall Methanation Reactors With Combined Diffusion and Kinetic ResistanceBy T. D. Ralston
This Bureau of Mines report presents a mathematical model for heterogeneously catalyzed chemical reactors operating under turbulent conditions. The model includes reaction kinetics on the catalyst sur
Jan 1, 1974
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RI 7029 Design And Development Of A Lightweight Recoverable Hydraulic PropBy Webster S. Anderson
The design, development, and testing of hydraulic props to provide a lightweight, high strength, recoverable unit is described. Modifications in design incorporating threaded components resulted in th
Jan 1, 1967
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Head-Trunk Motion Increase With Arm-Rest Controls - IntroductionBy N. Grosland, G. Kopp, L. Frey-Law, D. Wilder, M. Contratto, S. Rahmatalla, T. Xia
Heavy equipment manufacturers have made a long-term commitment to minimize operator vibration exposure for comfort, performance, and health reasons. Domestic and international guidelines/standards an
Jan 6, 2006
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Carbon Monoxide Fixed Point Continuous Monitor - ObjectiveProvide an instrument for continuous remote monitoring of carbon monoxide concentration in underground mines. Approach A carbon monoxide fixed? point continuous monitor consists of two modules. A
Jan 1, 1981
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RI 7953 Aqueous Reduction of Chalcopyrite Concentrate With MetalsBy M. B. Shirts
Bench-scale studies were made on a reductive hydrometallurgical procedure to convert chalcopyrite flotation concentrate to copper metal or a readily leachable sulfide. Reductive conversion of chalcopy
Jan 1, 1974
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Technology News - No. 476 - Instrumented King Wire for Monitoring Cable BoltsObjective A cable bolt can be a strain-measuring device as well as a supporting device in underground mines. Placing instruments on a cable bolt allows certain characteristics of a rock mass, such
Nov 1, 1998
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Evaluation Of Engineering Noise Controls For A Continuous Miner Conveyer SystemBy Peter Kovalchik, Ed Kwait, T. Michael Durr
1. BACKGROUND Many research projects on engineering controls for noise reduction in mining were conducted by the former U.S. Bureau of Mines, mostly under contracts from 1972 through 1986.1 Contra
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RI 9444 - Longwall Retreat of Gate Road Pillars (c7601020-d513-40cf-aea6-4d0a1eaae1e8)This report describes a U.S. Bureau of Mines investigation into the removal of gate road chain pillars in conjunction with longwall retreat mining. The research objective was to determine, through eva
Jan 1, 2010
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Reducing Respirable Dust Exposure of Workers using an Improved Clothes Cleaning ProcessBy Andrew D. O. O’Brien, Linda J. McWilliams, Joe L. Howell, Douglas E. Pollock, Jeanne A. Zimmer, Andrew B. Cecala
A quick, safe, and effective method has been developed that allows workers to clean their dust laden work clothing periodically throughout the day. For the mining industry, this technique is much more