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Effects Of Weak Bands On Pillar Stability In Stone Mines: Field Observations And Numerical Model Assessment
By John L. Ellenberger, Gabriel S. Esterhuizen
Observations of pillar conditions in limestone mines showed that the presence of weak bands in the limestone can result in pillar damage at stresses that are lower than one would otherwise expect. The
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Monitoring Foundation Response To Subsidence Using A Tiltmeter - Objective
[Determine how subsidence resulting from underground coal mining affects surface structures, and evaluate the usefulness s of the tiltmeter for monitoring foundation movement. Approach The Burea
Jan 1, 1988
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OFR-28(2)-76 Survey Of Underground Hydraulic Coal Mining Technology Volume 2 - Appendix A - Data On Underground Hydraulic Coal Mines ? A.1 Scope
By William C. Cooley
[Data from t.-raturs on each hydr,ne has been assembled on the- data sheets whichw6ed in this Appandin. Dai_iis are provl_ od for ::amines or hydraulic s-ctions in the USSR (TDPhw~s), 8 in ASR (Ku
Jan 1, 1975
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RI 3452 Studies Of Roof Movement In Coal Mines - 2. Crucible Mine Of The Crucible Fuel Co. ? Introduction
By E. R. Maize
This report is the second of a series on roof movement in coal mines. The first (R. I. 3355)4/ dealt with convergence of roof and floor and movement of the surface accompanying and following extractio
Jan 1, 1939
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Evaluation Of Gas-Enhanced Foam For Suppressing Coal Mine Fires
By M. A. Trevits, A. Ozmet, A. C. Smith, J. B. Walsh, T. P. Mucho
Improvements in remote fire fighting technology are needed to reduce miner exposure to the dangers of fires and possibly save the lives of those who may become trapped. The National Institute for Occ
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IC 9451 - Self-Contained Self-Rescuer Field Evaluation: Sixth-Phase Results
By Nicholas Kyriazi, John P. Shubilla
The National Institute for Occupational Safety and Health (NIOSH), Pittsburgh Research Laboratory, has undertaken a study to determine how well self-contained self-rescuers (SCSRs), deployed in accord
Jan 1, 2000
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Design In Weak Rock Masses: Nevada Underground Mining Operations
By Pakalnis Rimas, Lyndon Clark, Tom Brady
A major focus of ground control research presently being conducted by the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) is to incorporate data on wea
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Bibliography Of Petroleum And Allied Substances 1922 And 1923 - Introduction
By H. Britton
This bulletin is the seventh in the series of petroleum bibliographies published by the Bureau of Mines, Bulletins 149, 165, 180, 189, 216, and 220 being compilations for the years 1915, 1916, 1917, 1
Jan 1, 1929
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RI 7080 Kinetics Of The Initial Reduction Stages Of Magnetite In Hydrogen
By T. N. Rushton
Rate minima are encountered in the reduction of magnetite with hydrogen. In a certain temperature zone, the reaction rate decreases with rise in temperature. This is inexplicable by classical kinetic
Jan 1, 1968
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RI 4201 Bucket Drilling the Coso Mercury Deposit, Inyo Co. CA
By Dupuy. Leon W.
"INTRODUCTION For many generations the Indian tribes of the southwestern deserts knew of the thermal springs of the Coso District in southwestern Inyo County, Calif. Belief in the reputedly healing qu
Mar 1, 1948
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RI 4103 Argentena Zinc-Lead Mine, Clark Co. Nev.
By Robert W. Geehan
"INTRODUCTION A preliminary examination of the Argentena mine was made in 'January 1945 by an engineer of the Bureau, who recommended investigation by diamond drilling. The Bureau conducted a core-dri
Jul 1, 1947
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RI 5997 Methods For Producing Alumina From Clay - An Evaluation Of The Sulfurous Acid-Caustic Purification Process - Summary
By Frank A. Peters
This evaluation of the sulfurous acid process for the production of metallurgical-grade alumina is the first of a series concerning various known methods of extracting alumina from low-grade aluminous
Jan 1, 1962
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U.S. Bureau Of Mines Training Workshop On The "Mfire" Mine Fire And Ventilation Simulator - Mfire Users Manual Version 2.20 August 1995 ? Introduction
MFIRE is a computer simulation program that performs normal ventilation network planning calculations, and dynamic transient state simulation of ventilation networks under a variety of conditions. The
Jan 1, 1995
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Investigation Of Fully Grouted Roof Bolts Installed Under In Situ Conditions
By David Oyler, Craig Compton
The The National Institute for Occupational Safety and Health (NIOSH) Pittsburgh Research Laboratory (PRL) is continuing to investigate the behavior of fully grouted roof bolts in the weak roof rock o
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IC 9106 Availability Of Elemental Sulfur And Pyrite Concentrate-Market Economy Countries - A Minerals Availability Appraisal
By D. A. Buckingham
Engineering and economic evaluations were performed by the Bureau of Mines on 14 Frasch sulfur, 1 native sulfur, and 21 metal sulfide operations in 11 market economy countries. The evaluation included
Jan 1, 1986
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IC 8932 Costs And Effects Of Environmental Protection Controls Regulating U.S. Phosphate Rock Mining
By Ronald F. Balazik
This Bureau of Mines study identifies and examines the costs of Federal, State, and local environmental protection controls on domestic phosphate rock mining, The costs include the expenditures needed
Jan 1, 1983
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IC 6796 Apparatus and method for determination of helium in natural gas
By C. C. Anderson
"While conducting investigations in connection with the helium program of the Bureau of Mines, the Cryogenic Laboratory has improved an apparatus for the rapid and accurate determination of the helium
Jun 1, 1934
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RI 9331 - Characterization of the Rare-Earth Mineralogy at the Pea Ridge Deposit, Missouri
By C. W. Whitten
Iron ore deposits in south-central Missouri have emerged as a possible resource for the rare-earth elements. The Pea Ridge Iron Mine is one such deposit. Rare-earth minerals at the Pea Ridge Iron Mine
Jan 1, 1990
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Technology News - No. 502 - A New Training Video for Aggregate Operators "Aggregate Training for the Safety Impaired"
Objective To develop safety training tools for mine safety and health trainers that can be used for both new-miner training and annual refresher training. Background For the past 3 years, NIO
Jan 1, 2003
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IC 8033 Mining And Furnacing Mercury Ore At The New Idria Mine, San Benito County, Calif. ? Introduction And Summary
By R. K. Linn
The New Idria Mining and Chemical Co. owns and operates the New Idria mine in southern San Benito County, Calif. During 1957-59, the New Idria mine was the largest producer of mercury in the United St
Jan 1, 1961