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OFR-47-80 Interpretation Of Rock Mechanics Data (Vol. II) (A Guide To Using UTAH2)
By William G. Pariseau
A brief description of a two-dimensional elastic-plastic finite element program intended for mine stability analysis is presented that includes detailed instruction for input data preparation and how
Jan 1, 1978
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RI 4415 Investigation Of Zinc-Lead Deposits On Extensions Of The Miami Trough, Ottawa County, Okla., And Cherokee County, Kans.
By Clinton C. Knox
Attention of mine operators and engineers in the Picher zinc-lead field has been drawn increasingly in recent years to marginal ore deposits lying at greater than normal depth below surface in the mar
Jan 1, 1949
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MLA 19-83 - Mineral Investigation Of The Miranda Pine Rare II Area (No. 5114), Santa Barbara County, California - Summary
By Lucia Kuizon
The Miranda Pine Roadless Area Review and Evaluation (RARE II) study area (No. 5114) comprises 12,600 acres (5,100 ha) in Los Padres National Forest in Santa Barbara County, California, about 15 mi (2
Jan 1, 1983
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RI 3615 Analysis Of Power Consumption At Coal Mines - 1. Preliminary Study ? Introduction (1f54ba71-4451-444f-bdbf-69c9bdcc0c89)
By F. A. Jones
Increased mechanization .of coal mines has emphasized the need for study of actual power requirements of the various machines employed in the production of coal and losses in the distribution of power
Jan 1, 1942
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OFR-8-72 An Investigation Of The Adsorption Process In Coal Using X-Ray Diffraction
By Shih-Chi Chang
[An exploratory research is done on untreated coal 1v- using' x-ray crnctinn techniques. Comparison is made on diffraction data before And pct Pr n-tiAne is pressurized (n the coal samples. Alth
Jan 1, 2012
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OFR-46-74 A Study Of Roof Warning Signals And The Use Of Personal Hearing Protection In Underground Coal Mines
By James H. Prout
Roof warning signals were studied in 18 mines covering 5 coal seams. The results of this study confirmed that roof talk must be interpreted for each individual mine after all other conditions are pres
Jan 1, 1973
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RI 5479 Carbonizing Tests In Tuscaloosa Oven: Properties Of Wet- And Dry-Quenched Cokes ? Introduction And Summary
By J. B. Gayle
The merits of the various methods for dry-quenching coke have been the subject of numerous publications and almost equally numerous controversies for the past 40 years.5/ Most investigators have concl
Jan 1, 1959
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RI 9429 - Bending Fatigue Test 2 and 3 on 2-Inch 6X25 Fiber Core Wire Rope
By A. J. Miscoe, W. M. McKewan, J. R. Bartels
The U.S. Bureau of Mines has established a wire rope research laboratory to examine the factors that affect the life of wire rope. Two 2 in-diameter 6x25 fiber core (FC) ropes were degraded on a bendi
Jan 1, 1992
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A Guide For Reducing Fuel Consumption In Commercial Plants - Introduction
By J. F. Barkley
To aid in winning the recent world war, the Bureau of Mines conducted a National Fuel Efficiency Program, directed to commercial plants throughout the Nation, to save greatly needed fuel, a basic reso
Jan 1, 1947
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Controlled-Yielding Rock Bolt - Objective
To allow the controlled yielding of mine walls in order to reduce rock-burst hazards and reduce maintenance caused by excessive squeezing forces. Approach Rock bolts that elongate and continue
Jan 1, 1977
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RI 3518 An Experimental Study Of The Ignition Of Firedamp-Air Mixtures By Explosives ? Introduction
By Etienne Audibert
No satisfactory theory has yet been advanced to explain what takes place when an explosive is fired in a mixture of firedamp and air. The only means of measuring the' danger is to fire the explos
Jan 1, 1940
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RI 3518 An Experimental Study Of The Ignition Of Firedamp-Air Mixtures By Explosives ? Introduction (de8f492c-70bd-4a77-aef1-3b215d7ff28a)
By Etienne Audibert
No satisfactory theory has yet been advanced to explain what takes place when an explosive is fired in a mixture of firedamp and air. The only means of measuring the danger is to fire the explosive in
Jan 1, 1940
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OFR-53-83 Investigation Of Extinguishing Agents For Coal Dust Explosions
By Marcel Vanpee
Eight extinguishing powders KCI, were tested on five types of diffusion flames. The effect of flame temperature on the inhibition efficiency was investigated by varying the oxygen index of the flame s
Jan 1, 1982
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OFR-14-89 Soil Extractions For Determining Heavy Metal Bioavailability In Mining Waste
By William M. Schafer
Forage plots were established on agricultural lands contaminated by acid mining waste. The acid produced through oxidation of pyrite and other sulfides caused elevated solubility and plant availabilit
Jan 1, 1989
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Flood Prevention In Anthracite Mines, Western Middle And Southern Fields - Anthracite Region Of Pennsylvania - Project No. 2 - Summary
By S. H. Ash
THIS REPORT covers the second in a series of five projects into which the Conowingo tunnel system has been divided for geographical and practical reasons. It outlines the construction work contemplate
Jan 1, 1955
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OFR-58-73 Constitutive Relations Of Coal - Annual Report 1972 - Summary Of Activities Of The Year 1972 ? Introduction
By Hon-Yim Ko
1972 constituted the second year of the projected five-year study on constitutive relations of coal. The schedule adhered closely to the five-year outline which is summarized in Table 1. This chapter
Jan 1, 1972
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IC 6120 Geophysical Abstracts - No. 1 - 1 - Gravitational Methods - Wireless Control Of Coincidence Outfit For Relative Gravity Measurements
By Berger
A detailed description is given of radio apparatus for controlling a coincidence outfit for relative gravity measurements. This is probably of little interest, since many types of apparatus could be u
Jan 1, 1929
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RI 4417 Investigation Of Parker And Webb Zinc Deposits St. Lawrence County. N.Y.
By H. P. Hermance
Preliminary examinations of the Parker and Webb deposits were made by E. E. Maillott, Bureau of Mines engineer in July 1942. The chemical and spectrographic analyses included in this report wore made
Jan 1, 1949
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IC 6708 Diamond Drilling At The United Verde Mine ? Introduction
By Mayer G. Hansen
A series of papers dealing with diamond drilling practices, compiled in accordance with an outline prepared by engineers of the United States Bureau of Mines, is to be published as information circula
Jan 1, 1933
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RI 5323 Percolation Leaching Of Manganese Ores With Sulfur Dioxide ? Summary And Conclusions
By F. N. Bender
Percolation leaching of wad-type manganese ores was investigated, using a novel system of alternate upward passage of sulfur dioxide gas through moistened ore and downward percolation of wash solution
Jan 1, 1957