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OFR-77-81 A Model For The Determination Of Flyrock Range As A Function Of Shot Conditions
By Julius Roth
Flyrock is the source of most of the injuries and property damage in a majority of blasting accidents in surface mines. A quantitative correlation between shot conditions and maximum flyrock range can
Jan 1, 1979
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IC 8553 Mathematical Smoothing Of Digitized X-Ray Spectra
By Harold E. Marr
A simple algorithm is presented for processing digitized X-ray spectra obtained with a Si(Li) or Ge(Li) semiconductor detector coupled to a multi- channel analyzer. The simplified least-squares proced
Jan 1, 1972
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OFR-80-82 Mine Personnel Locator And Mine Activity Controller
By A. J. Farstad
Recent advances in microcomputer technology have opened the way for systems which can track the location of underground mining personnel from the surface. A computerized system has been designed which
Jan 1, 1981
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RI 7716 Use Of Cryogens To Reclaim Nonferrous Scrap Metals
By E. G. Valdez
Three cryogenic systems that utilized liquid nitrogen, dry ice, and methanol with dry ice were investigated in conjunction with crushing and classifying techniques. The systems were used to aid in sep
Jan 1, 1973
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RI 8274 Coal Mine Floor Heave in the Beckley Coalbed, An Analysis
By James R. Aggson
This Bureau of Mines report describes floor heave ground control problems that have been encountered in a new underground coal mine in West Virginia. Previous experience in the coal seam, the results
Jan 1, 1978
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RI 7055 Lightweight Aggregates - Expansion Properties Of Selected Michigan Shales
By James H. Aase
Shales from 10 locations in Michigan were sampled, tested, and evaluated to determine their suitability as raw materials for producing lightweight aggregate by rotary-kiln methods. Sampling procedures
Jan 1, 1967
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IC 8390 Basic Coal Research In The United States
Reports by researchers in government, industry, and universities of the United States are given for various projects on basic coal research concerning, the metamorphism, physical and chemical properti
Jan 1, 1968
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SP 13-94 - Bureau of Mines Publications and Articles, 1992-93 with Subject and Author index
The U.S. Bureau of Mines (USBM) was established in the public interest to conclude inquiries and scientific and technologic investigations on mining and the preparation, treatment, and utilization of
Jan 1, 2007
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RI 8494 Inorganic Cement for Mine Roof-Bolt Grouting
By R. E. Simpson
Beginning in 1972, fully grouted resin bolts were used in underground mines. An estimated 20 million resin bolts will be installed in 1980 owing to their apparent support improvement in most roof-bolt
Jan 1, 1980
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RI 5071 Laboratory Evaluation Of Vacuum Flotation For Cleaning Coal Fines ? Introduction And Summary
By H. L. Riley
Cleaning and handling of fine coal are generally conceded to be more difficult problems than preparation of the coarser sizes. Increased mechanization in the coal-mining industry has, in general, resu
Jan 1, 1954
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OFR-15(1)-82 Area Terrace Pit Coal Mining Systems - Volume 1 - Technical & Economic Evaluation Of Terrace Pit Mining Systems
By Fred Leonard
This report is principally concerned with the engineering and economic feasibility of area surface coal mining systems other than draglines. This analysis evaluates shovel/ trucks, shovel/crusher/conv
Jan 1, 1980
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IC 7887 Mining And Transporting Coal Underground By Hydraulic Methods: A Literature Survey ? Introduction And Summary
By William T. Boyd
Foreign mining publications describing successful hydraulic mining installations, and successful domestic hydraulic mining in a gilsonite bed, have prompted the Federal Bureau of Mines to conduct a li
Jan 1, 1959
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RI 9069 - Fugitive Dust Control for Haulage Roads and Tailing Basins
By Keith S. Olson
During 1982 and 1983, the Bureau of Mines concentrated its fugitive dust control research on haulage road dust suppression by newer chemi-cals relatively unknown in the mineral industry, innovative du
Jan 1, 1987
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OFR-62-85 Evaluation And Demonstration Of Underhand Stoping To Control Rock Bursts
By D. D. Bush
Based on the results of this study, the underhand cut and fill stoping method, with mass destressing, is an effective method for controlling rock bursts and falls of ground for deep mining in the Coeu
Jan 1, 1982
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OFR-33-84 Appraisal Of Deeper Soil Loosening Equipment For Use In Reclaiming Illinois Prime Farmland After Surface Coal Mining
By Yoginder P. Chugh
This study has appraised available deeper soil loosening equipment in the 1-4 ft. depth range, in the U.S. and abroad which has potential for Illinois prime farm-land reclamation. The appraisal was ba
Jan 1, 1983
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Review Of The Mineral-Fuel Industries ? General Summary (3052dae3-a5a2-411a-8f19-cddc9266c16a)
By Warren E. Morrison
INCREASED production and utilization of minerals fuels and power accompanied the overall expansion in U.S. economic activity during 1963, which saw continued advances toward higher production, employm
Jan 1, 1964
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OFR-84-84 Development And Trials Of A Commercially Practice Roof Fall Warning Systems
By James E. Aplin
Previous studies have shown that fracturing of roof strata precedes ultimate failure, and that the fracture development causes an accompanying increase in the apparent resistivity of the strata. Using
Jan 1, 1983
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OFR-84-82 Feasibility Of Water Injection For Particulate Removal In Large Turbocharged Diesel Engines
By R. N. Hambright
Gaseous and particulate exhaust emissions are characterized for a 1200 Bhp two-stroke cycle diesel, a 1000 Bhp four-stroke cycle pre-combustion chamber diesel, and a 900 Blip four-stroke cycle, direct
Jan 1, 1981
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OFR-127-85 Through-The-Earth Electromagnetic Trapped Miner Location Systems. A Review (0167947a-011e-41eb-b37b-cd1aaf8b20c4)
By Walter E. Pittman
In its role of providing technical assistance to the mining industry, the Bureau of Mines' Tuscaloosa Research Center has conducted research to develop trapped miner location systems which would
Jan 1, 1982
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OFR-16-73 Preliminary Performance Predictions For Electromagnetic Through-The-Earth Mine Communications ? I. Introduction (31e3a722-de61-41b3-9212-f3a681e09dae)
This Technical Memorandum Report is a collection of three working memoranda, prepared during the course of our work for the bureau of Mines and hound together for convenient reference. These working m
Jan 1, 1972