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OFR-155-82 Longwall Mining Principles For Safely Working Steep Coal Seams
By Roger F. J. Adam
This report summarizes the principles of safely working steep coal seam using longwall mining methods. It presents the state-of-the-art and identifies the problems which result from seam inclination.
Jan 1, 1981
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RI 4966 Estimate of Known Recoverable Reserves of Coking Coal in Wyoming County, W. Va.
By Joseph J. Wallace, William H. Tavenner, D. A. Reynolds, John M. Provost, James J. Dowd, R. F. Abemethy
"CONCLUSIONSThe investigation shows that there are 5 coal beds of major importance in Wyoming County from the standpoint of present production - Pocahontas No. 3, No. 2 Gas, Sewell, Beckley, and Eagle
Apr 1, 1953
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OFR-121(1)-82 Health And Safety Analysis On Support Walls
[lllc purpabr at thla report Vd, Lu JeLermlnr the health ar1J sdfet?; Nene11Le a octatc?J ultll Lne oar L.t support Ydlll ..up.I,ated lu dltetllative cupPurt svsLem, larrellLty hcle.g uaeJ af the Len,
Jan 1, 1980
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Mineral Investigation Of The Lower Saline Valley Wilderness Study Area (BLM No. CDCA-117A), Inyo County, California ? Summary Statement
By Clayton M. Rumsey
No producing or developing mines nor known mineral resources are in the Lower Saline Valley Wilderness Study Area. The inactive Bonanza Prospect has low potential for copper-gold-silver resources. Sto
Jan 1, 1984
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OFR-66-79 Development And Fabrication Of A Prototype Fibrous Aerosol Monitor (FAM)
By Pedro Lilienfeld
This report describes a program whose objective was to develop, design, fabricate and laboratory-test two prototype instruments capable of real-time selective detection and measurement of airborne fib
Jan 1, 1977
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RI 9571 - In-Mine Evaluation of Catalyzed Diesel Particulate Filters at Two Underground Metal Mines
By Winthrop F. Watts
The U.S. Bureau of Mines evaluated the performance of a catalyzed diesel particulate filter (CDPF) and a CDPF combined with a diesel oxidation catalyst (DOC) at two metal mines. This report describes
Jan 1, 2010
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OFR-77-77 Further Development And Evaluate Fluorescent Lighting Systems For Underground Mines
By Albert Ketler
[Early Bureau of Mines research had produced a fluorescent mine illumination system which was approved by MESA under Schedule 29A for use as portable equipment Intense industry preference for machine-
Jan 1, 1976
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OFR-103(1)-79 Control Of Vibration And Blast Noise From Surface Coal Mining - Volume I
By John F. Wiss
A series of controlled experiments was conducted at four surface coal mines to study the effects of certain blast parameters upon the ground and air vibration. Preliminary scale-model blasts were cond
Jan 1, 1978
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RI 7612 Effect Of Preheating Upon Metallization Of Iron Ore Pellets
By R. B. Schluter
Drying and preheating (partial induration) the green, unfired iron ore pellets is a means of reducing the energy required to produce metallized pellets. The Bureau of Mines processed three magnetite a
Jan 1, 1972
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Thermodynamic Properties Of Carbides, Nitrides, And Other Selected Substances
By L. B. Pankratz
Thermodynamic data on carbides, nitrides, and other selected substances were reviewed, evaluated, and compiled at the U.S. Bureau of Mines Albany Research Center. Values for Cp°, S°, H° - H°298, -(G°
Jan 1, 1994
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RI 8903 - Continuous Beneficiation of Dolomitic Phosphate Ores
By B. E. Davis
Over 80 pct of domestic phosphate rock, which is the starting material for phosphorus-containing fertilizers, comes from central Florida deposits. As K-her grade deposits are depleted, lower grade pho
Jan 1, 1984
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OFR-129-76 Ignition Suppression Device
By Will B. Jamison
An ignition detection and suppression system was developed under the scope of this contract. The objective of this machine mounted system was to detect flames caused by frictional sparking from the cu
Jan 1, 1976
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OFR-145-81 Longwall Subsidence Case History Numbers 3 And 4 - Northern Appalachian Coal Region
By Larry R. Powell
As part of the Bureau of Mines effort to establish a comprehensive subsidence data base for subsidence technology development, subsidence and related data are being compiled for various mining, geolog
Jan 1, 1981
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American Lignites: Geological Occurrence, Petrographic Composition, And Extractable Waxes ? Introduction
By W. A. Selvig
EQUIREMENTS of montan wax for industrial use in the United States before World War II were met by imports, nearly all of which came from Germany. An important industry for extraction and refinement of
Jan 1, 1950
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IC 6125 The Free Energy Of Water, Carbon Monoxide, And Carbon Dioxide
By E. D. Eastman
The basic character of the free energy r data relating to water and the oxides of carbon makes it desirable that the most representative values that can be obtained should be constantly available. The
Jan 1, 1929
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Bulletin 36 Alaskan Coal Problems
By Walter L. Fisher
The public interest in the Alaskan situation is such that, with the consent of the President, I have concluded, at the request of the American Mining Congress, to make at this time a candid, if somewh
Jan 1, 1911
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RI 3457 Friability, Slacking Characteristics, And Low-Temperature Carbonization Assays Of Subbituminous Coals Of The Denver, Colo. Region
By Parry. V. F., John B. Goodman
"INTRODUCTION The Denver region coal field, covering an area of approximately 7,640 square miles, extends from the Wyoming State line to the middle of El Paso County, Colo. The coal in this region is
Aug 1, 1939
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OFR-103(1)-75 Circuit Breaker Development And Application - USBM Contract Phase I Report - Section 1. Program Objectives And Results - 1. 1 Background
By D. A. Paice
Direct current electrical systems are used in most coal mines primarily to power the main haulage trains and secondarily to feed other equipment and passageway lighting. Electrical power is supplied f
Jan 1, 2012
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Advances In Remote Sensing Techniques For Monitoring Rock Falls And Slope Failures
By E. L. McHugh, R. T. Mayerle, J. M. Girard
Ground control problems at surface mining operations can occur for a variety of reasons. Stress, gravity loading, rock strength, geology, pore pressure, weather effects, underground workings, and many
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Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
By Lynn Alcorn, Jeffrey Shawn Peterson
Data collected by the Mine Safety and Health Administration (MSHA) has shown that roof bolting machine (RBM) operators are the second most likely type of underground mining machine operator to be are