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Facts About Light
This chapter defines light as a type of energy, and tells how different features of light are measured. It 1s important to understand the units of light measurement because they are used throughout th
Jan 1, 1976
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RI 9177 - Horizontal Trajectories of Rotary- Drilled Holes
By Tobias W. Goodman, Joseph Cervik
This Bureau of Mines report investigates the horizontal trajectory of boreholes drilled in coalbeds using the rotary drilling technique. Test holes drilled in coalbeds showed that the path of a boreho
Jan 1, 1988
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Design Procedure Optimizes Roof Truss Installations In Bedded Roof - Objective
Provide mine personnel with a convenient means of determining the optimum installation geometry of roof trusses in bedded roof. Background Mine operators frequently ask the following questions
Jan 1, 1989
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RI 7920 Evaluating Plastic Scintillators for Detecting Prompt Gamma Rays in Continuous Analysis of Bulk Materials
By A. W. Hall
Cylindrical plastic scintillators were investigated for efficiency in detecting neutron-induced prompt gamma rays. Scintillator performance was compared on the basis of half-resolution and peak-to-tro
Jan 1, 1974
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Improved Measurement Of Stopping Leakage - Objective
Measure the leakage through individual crosscut stoppings quickly and economically so that the worst ones can be identified and repaired. (Typically 60 to 80% of the air supplied to a mine short circu
Jan 1, 1979
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Bulletin 227 Flame Safety Lamps
By L. C. IlsLey, J. W. Paul, E. J. Gleim
Flame safety lamps have been used in gaseous mines since the Davy lamp was introduced, more than 100 years ago. During the last decade the flame safety lamp has been rapidly replaced by the electric l
Jan 1, 1924
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Mine Stench Fire Warning Computer Model - Objective
Enable mine personnel to determine the effectiveness of and to optimize the mine fire stench warning system without resorting to costly trial and error fire drills. Approach The mine fire sten
Jan 1, 1986
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RI 8599 Guidelines for Selecting Seismic Detectors for High-Resolution Applications
By C. Melvin Lepper
To provide the U.S. mining and energy industries with information in the selection of seismic detectors for high-resolution applications, the Bureau of Mines evaluated 35 velocity detectors (geophones
Jan 1, 1981
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Fluorine Micas
By Haskiel R. Shell
While the original purpose of the Bureau of Mines work on fluorine micas was to synthesize large single crystals or film suitable to replace natural muscovite or phlogopite, the objective was broadene
Jan 1, 1969
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IC 9330 Analysis Of Microcomputer Network For Computer-Assisted Mining Research
By Edward F. Fries
The U.S. Bureau of Mines is conducting research that will lead to computer-assisted mining equipment. This research will facilitate improvements in safety by relocating workers from dangerous areas an
Jan 1, 1992
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OFR-41-88 Measuring Critical Mine Health And Safety Skills
By Henry P. Cole
A series of studies are described that identify critical health and safety skills needed by underground coal miners for coping with mine emergencies. First aid and self-rescue and escape were selected
Jan 1, 1988
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1 Introduction - 1.1 Noise-Induced Hearing Loss
By Efrem R. Reeves
Noise-induced hearing loss (NIHL) is the most common occupational illness in the United States, with 30 million workers exposed to excessive noise levels [NIOSH 1996] every day. Of particular concern
Dec 1, 2009
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Bibliography Of Pressure Hydrogenation (In Three Parts) I. Review And Compilation Of The, Literature On The Pressure Hydrogenation Of Liquid And Solid Carbonaceous Materials - Introduction
By J. L. Wiley
THIS REVIEW contains abstracts of the technical literature and patents dealing with the history, development, and commercial application of the Bergius and related processes for the hydrogenation, und
Jan 1, 1950
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IC 6423 Compendium of Limes in Hydrometallurgy and Flotation
By R. G. O'MEARA, Alexander M. Gow, W. T. SCHRENK
Lime is used extensively in the various industries. The National Lime Association in an excellent and recent bulletin lists 23 important in- dustries in which lime plays a vital role; and it thereby j
Apr 1, 1931
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RI 9384 - High-Temperature Cyanide Leaching of Platinum-Group Metals From Automobile Catalysts-Laboratory Tests
By D. P. Desmond
The U.S. Bureau of Mines investigated leaching automobile catalysts with sodium cyanide (NaCN) solutions at high temperatures to recover platinum-group metals (PGM). The feed was virgin monolith rejec
Jan 1, 2010
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IC 8654 The Bureau Of Mines Minerals Availability System And Resource Classification Manual
This Information Circular describes the Bureau of Mines Minerals Availability System (MAS), presents the Resource Classification Manual used for information input to a computer file, and discusses the
Jan 1, 1974
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The Status of Mine Fire Research in the United States
By M. A. Trevits
During the time period from 1990-2007, 1601 reportable fires occurred in the U.S. mining industry (an average of 89 fires per year). The leading causes of U.S. mine fires were flame cutting and weldin
Jan 1, 2008
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RI 9481 - Recycling Of Neodymium Iron Boron Magnet Scrap
By J. W. Lyman
The U.S. Bureau of Mines investigated methods of separating valuable rare-earth materials from Fe in neodymium iron boron (NdFeB) magnet scrap. A selective oxidation treatment of the scrap oxidized th
Jan 1, 2010
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Hydrogenation Of Coal In The Batch Autoclave
By C. O. Hawk
A PART of the Bureau of Mines effort to improve the conversion of coal to liquid fuels, batch autoclave tests were made on the hydrogenation of bituminous coal by a dry method, which featured charging
Jan 1, 1965
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OFR-21(2)-78 Brake Evaluations & Recommendations - Evaluation And Development Of Performance Requirements Of Braking Systems For Rubber Tired Mining Equipment In Underground Non-Coal Mines User's Manual
By Walter W. Kaufman
This User's Manual, extracted from information contained in the Final Report for the above referenced project, outlines test procedures to measure the braking capabilities of underground non-coal
Jan 1, 1977