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Experiments in Underground Communication Through Earth Strata
Technical paper issued by the Bureau of Mines over studies in mine safety and communication. The methods and equipment used in the studies are presented and discussed. This paper includes tables, illustrations, and photographs.
Date:
1928
Creator:
Ilsley, L. C.; Freeman, H. B. & Zellers, D. H.
System:
The UNT Digital Library
Applicability of Radio to Emergency Mine Communications: Progress Report, September 1946 to November 1947
Report issued by the Bureau of Mines over the progress made in emergency mine communications. The results of testing done on low-frequency radio communication are presented. This report includes tables, graphs, illustrations, and photographs.
Date:
May 1948
Creator:
Felegy, E. W. & Coggeshall, E. J.
System:
The UNT Digital Library
Applications of a Small Electronic Digital Computer to Pyrometallurgical Research
Report issued by the U.S. Bureau of Mines discussing the use of small digital computers for problem solving during pyrometallurgical research. As stated in the field of research, "the scope of research varies from the development of new processes to the evaluation of raw materials for existing processes. The types of calculations required range all the way from those involving attempts to determine complex mathematical relationships between physical quantities to those concerned with simple summaries and analyses of daily furnace production" (p. 2-3). This report includes tables, illustrations, and a photograph.
Date:
1960
Creator:
Leary, R. J.; Smith, R. W., Jr. & Mitchel, B. J.
System:
The UNT Digital Library
Proceedings: Fifth International Conference of Directors of Mine Safety Research
From Reinstatement of Fifth Conference: "The program of the Fifth Conference is reproduced below. Of the time allotted for each paper, about half was used for presentation and half for discussion. Out of this developed the program that is the subject of this publication."
Date:
1950
Creator:
Greenwald, H. P.
System:
The UNT Digital Library
Potash Bibliography to 1928 (Annotated): Review and Compilation of Technical Literature on Potash Salts (including the Alunites) and Their Foreign Occurrences
From Scope and Arrangement of Review: "This review is confined to the technical literature of the origin, history, and foreign occurrences of saline potassium minerals, their mining, description, treatment, and physical-chemical relations. The literature on alunite, jarosite, and related minerals has also been included. The literature on potash minerals associated with the nitrate deposits and on the silicate minerals has been omitted as well as that on analytical methods, statistics, political economy, and the very large field of patent literature. The material in this review is arranged chronologically and alphabetically according to the authors within each year."
Date:
1930
Creator:
Berliner, J. F. T.
System:
The UNT Digital Library
Static Electricity in Nature and Industry
From Introduction: "In this bulletin "static electricity" is used in its commonly accepted meaning to include the various manifestations that result from the coming together or neutralization of positive and negative charges with have been separated by friction between unlike substances or otherwise. Although the scope of the this report is rather broad, it deals primarily with static electricity as a hazard. Casual and experimental observations recorded herein are thus given for a background and for the purpose of suggesting hazards not yet recognized."
Date:
1939
Creator:
Guest, Paul G.
System:
The UNT Digital Library
Geophysical Prospecting: Some Electrical Methods
Technical paper issued by the Bureau of Mines over experiments in electrical methods. The methods and equipment used are presented and described. This paper includes tables, illustrations, and photographs.
Date:
1928
Creator:
Eve, A. S. & Keys, D. A.
System:
The UNT Digital Library
Bibliography of Bureau of Mines Investigations of Coal and its Products, 1945 to 1950
Report displaying the bibliographies of coal investigations from January 1, 1945, to January 1, 1950.
Date:
1954
Creator:
Carman, E. P.; Opperman, M.; Nishiyama, S. & Racoosin, L.
System:
The UNT Digital Library
Investigation of Optimum Thrust, Cutting Speed, and Water Pressure for Tungsten Carbide and Polycrystalline Diamond Compact Roof-Bolt Drill Bits
Abstract: Laboratory tests were conducted at the U.S. Bureau of Mines to determine the effects of roof-bolt drilling parameters on penetration rate in sandstone using tungsten carbide alloy (WC-Co) and polycrystalline diamond compact (PDC) drill bits. During the tests, water pressure of 552 kPa was found to be adequate for removing the cuttings from the tops of drill holes. Test results show that for both types of bits, penetration rate increased when thrust was raised from 227 to 1,588 kg. When water pressure rose from 554 120 to 1,344 350 kPa, the effect on penetration rate was not significantly different. Conventional WC-Co bits became dull when one or two holes were drilled, after which the penetration rate dropped dramatically. Microscopic examination shows that the cutting edges of PDC bits also become somewhat dull, but at a much lesser rate than WC-Co tips. Microscopic examination also reveals that the wear mechanism of WC-Co and PDC bits is quite different, which may explain the longer life of the PDC bits.
Date:
1995
Creator:
Sundae, Laxman S.; Smelser, Thomas W. & Howie, Wayne L.
System:
The UNT Digital Library
Studies of Certain Properties of Oil Shale and Shale Oil
From Scope of Report: "In connection with the study of the oil-shale resources of the United States, the Bureau of Mines has carried on not only extensive laboratory and field investigations but has constructed and operated an experimental shale-oil plant in Colorado. This report is based entirely upon subject matter that appeared in published and unpublished manuscripts of the Bureau of Mines."
Date:
1938
Creator:
Guthrie, Boyd
System:
The UNT Digital Library
Improved Grindability of Taconite Ores by Microwave Heating
The 11.S. Bureau of Mines has conducted studies to utilize rapid microwave heating to stress fracture ore samples. Iron ores containing hematite, magnetite, and goethite were subjected to microwave energy in batch operations at 3 kW and heated to average maximum temperatures between 840 and 940 *C. Standard Bond grindability tests showed that microwave heating reduced the work index of iron ores by 10 to 24 pct. In a microwave chamber designed to simulate a continuous throughput operation at 3 kW, the grindability of a tacon-te ore was improved by 13 pct at a bulk temperature of 197 *C. Because stress cracking occurred at a lower temperature, less energy was consumed. To further improve the economics of microwave fracturing, higher powers up to 16 kW were used to rapidly heat samples to relatively low temperatures in a continuous, belt-fed applicator. A significant improvement of grindability was obtained with a larger rod mill feed size in comparison to a minus 6-mesh Bond feed.
Date:
1995
Creator:
Walkiewicz, John W.; Lindroth, David P. & Clark, Andrea E.
System:
The UNT Digital Library
Infrared and Ultraviolet Spectrometric Techniques and Spectra-Structure Correlations
From Introduction: "The work in absorption spectrometry performed in the Bureau at Bruceton laboratories will be described in this bulletin."
Date:
1966
Creator:
Friedel, R. A. & Queiser, J. A.
System:
The UNT Digital Library
Oil-Shale: An Historical, Technical, and Economic Study
Report issued by the U.S. Bureau of Mines discussing studies conducted on the development of the oil-shale industry from a historical, technical, and economic perspective. Results of the studies are presented. This report includes tables, illustrations, and photographs.
Date:
July 1922
Creator:
Gavin, Martin J.
System:
The UNT Digital Library
Prospecting and Testing for Oil and Gas
From Introduction: "Part I of this paper discusses briefly some of the features of oil and gas accumulation and describes certain oil-field rocks and minerals. Part II deals with the kinds of tools that should be used and the information necessary for selecting proper tools. Part III discusses the accurate testing of strata for oil or gas and states principles based on conditions that have frequently existed in well drilling."
Date:
1922
Creator:
Collom, R. E.
System:
The UNT Digital Library
Protection of Oil and Gas Field Equipment Against Corrosion
From Introduction: "This bulletin describes common causes and effects of oil and gas field corrosion and outlines methods of abating the damage."
Date:
1925
Creator:
Mills, R. Van A.
System:
The UNT Digital Library
Oil Shale: An Historical, Technical, and Economic Study
Revised report issued by the U.S. Bureau of Mines discussing studies conducted on the development of the oil-shale industry from a historical, technical, and economic perspective. Results of the studies are presented. This report includes tables, illustrations, and photographs.
Date:
1924
Creator:
Gavin, Martin J.
System:
The UNT Digital Library
Kinetics of the Reactions of Carbon Dioxide and Steam with Coke
From Summary: "To incorporate the role of diffusional resistance in the rate equations it is essential that the solid state of the carbons be better understood; that is, their microporosity, crystallinity, and electronic state of free and oxygen-containing reaction sites. The importance of the solid state to kinetic behavior has been stressed throughout the text."
Date:
1962
Creator:
Ergun, Sabri
System:
The UNT Digital Library
The Explosibility of Coal Dust
"This bulletin traces the growth in the belief in the explosibility of coal dust, summarizes the experiments and mine investigations that have established this belief, and gives the present status of preventive measures" (p. 9). Index begins on page 201.
Date:
1911
Creator:
Rice, George S.
System:
The UNT Digital Library
City Smoke Ordinances and Smoke Abatement
From Introduction: "In connection with the fuel investigations conducted by the Bureau of Mines much information has been accumulated as to the smoke abatement activities in various cities. The essential features of the information are presented in this report, which, it is believed, will be of public interest and benefit, especially to those communities that are just beginning organized effort to abate unnecessary smoke."
Date:
1912
Creator:
Flagg, Samuel B.
System:
The UNT Digital Library
Electric Brass Furnace Practice
Report issued by the Bureau of Mines discussing the use of electric furnaces for melting brass, and other nonferrous alloys. Monetary benefits, health benefits, and other advantages of using electric furnaces are presented. Descriptions of furnaces and their operational methods are also presented. This report includes tables, illustrations, and photographs.
Date:
1922
Creator:
Gillett, H. W. & Mack, E. L.
System:
The UNT Digital Library
Bibliography of Bureau of Mines Health and Safety Publications: January 1947-June 1955
From Introduction: "While the basic purpose of this bulletin is to describe health and safety reports for the period January 1947 through 1955, a selected number of earlier publications that are believed pertinent for reference purposes are included."
Date:
1956
Creator:
Humphrey, H. B. & Stratton, Hazel J.
System:
The UNT Digital Library
Electric Brass Furnace Practice
Report discussing 1) the pertinent information available on what electric furnaces can do to assist prospective users in selecting a furnace that fits their requirements and 2) the gradual evolution of the present commercial types of electric furnaces. Also discusses some of the fundamental principles in the design, construction, and operation of electric furnaces.
Date:
July 1922
Creator:
Gillett, H. W. & Mack, E. L.
System:
The UNT Digital Library
Flammability Characteristics of Combustible Gases and Vapors
From Introduction: "The purpose of this bulletin is to present a general review of the subject of flammability, and to supply select experimental data and empirical rules on the flammability characteristics of various families of combustible gases and vapors in the air and other oxidizing atmospheres."
Date:
1965
Creator:
Jensen, J. W. & Walsh, D. F.
System:
The UNT Digital Library
Heat Transfer From a Gas Stream to a Bed of Broken Solids
From Introduction: "This study of heat transfer is part of an extensive program of research of the iron blast furnace which the Bureau of Mines is conducting in the laboratory and in the field."
Date:
1932
Creator:
Furnas, C. C.
System:
The UNT Digital Library