Report of investigations (United States. Bureau of Mines) ; 9092
Description:
"The Bureau of Mines conducted underground mapping and rock strength tests to describe and analyze mine roof conditions surrounding ancient stream cha...
Report of investigations (United States. Bureau of Mines) ; 9106
Description:
"The Bureau of Mines conducted basic experiments to study the process of crack propagation with a wedge indenter. The work was conducted under plane s...
Report of investigations (United States. Bureau of Mines) ; 9107
Description:
"The Bureau of Mines conducted a study to (1) determine from laboratory tests the feasibility of a photographic method for determining reflectances th...
Report of investigations (United States. Bureau of Mines) ; 9143
Description:
"This report discusses the Bureau of Mines efforts to develop partial protective structures for operators of low-coal shuttle cars. In coal seams 48 i...
Report of investigations (United States. Bureau of Mines) ; 9103
Description:
"In pursuit of innovative methods to improve mining productivity, the Bureau of Mines is investigating the use of inorganic salts as drilling fluid ad...
Information circular (United States. Bureau of Mines) ; 9155
Description:
Outbursts are sudden and violent releases of gas and coal that result from a complex function of geology, stress regime, and gas pressure and content....
Serbousek, M. O. (Maynard O.) ; Signer, S. P. (Stephen P.) ;
Corporate Authors:
United States. Bureau of Mines.
Published Date:
1987
Series:
Report of investigations (United States. Bureau of Mines) ; 9135
Description:
"The load-transfer mechanics of fully grouted roof bolts in coal mines have been investigated in laboratory and analytical studies. The purpose of thi...
Report of investigations (United States. Bureau of Mines) ; 9136
Description:
"Single-entry gas explosion characteristics for the Bruceton Experimental Mine (BEM) are compared to those occurring in the larger geometries of the n...
Report of investigations (United States. Bureau of Mines) ; 9081
Description:
"Longwall roof behavior is characterized by strata displacements in both the face-to-waste (horizontal) and roof-to-floor (vertical) directions. The r...
Report of investigations (United States. Bureau of Mines) ; 9124
Description:
"This report describes the preliminary results of a Bureau program to develop and test an inexpensive grout for full-column support of roof bolts. Var...
Wilemon, G. M. (Gary Michael) ; Scheiner, Bernard J. ;
Corporate Authors:
United States. Bureau of Mines.
Published Date:
1987
Series:
Report of investigations (United States. Bureau of Mines) ; 9094
Description:
"The Bureau of Mines conducted preliminary investigations on the use of an acid-alcohol leaching technique for recovering phosphate values from phosph...
Report of investigations (United States. Bureau of Mines) ; 9169
Description:
"This Bureau of Mines report analyzes diverse observations of the rates and mechanisms for the pyrolysis and devolatilization of coal and polymethylme...
Report of investigations (United States. Bureau of Mines) ; 9123
Description:
"This is the second in a series of Bureau of Mines reports that describe experiments designed to devise an efficient, economic mechanical fragmentatio...
Report of investigations (United States. Bureau of Mines) ; 9112
Description:
"As part of an ongoing study to determine how the wear of mining tools affects dust generation, the Bureau of Mines has measured bit temperature rise ...
Kravits, S. J. (Stephen J.) ; Sainato, Albert ; ...
Corporate Authors:
United States. Bureau of Mines.
Published Date:
1987
Series:
Report of investigations (United States. Bureau of Mines) ; 9102
Description:
"This report describes a project conducted by the Bureau of Mines in which the accurate directional drilling of a borehole was demonstrated with the o...
Report of investigations (United States. Bureau of Mines) ; 9090
Description:
"The Bureau of Mines performed laboratory research to determine the effects of a barium-based fuel additive on diesel particulate emissions. The test ...
Dahlin, D. C. (David Clifford), 1951- ; Brown, L. L. (Lawrence L.), 1928- ; ...
Corporate Authors:
United States. Bureau of Mines.
Published Date:
1987
Series:
Report of investigations (United States. Bureau of Mines) ; 9145
Description:
"The Bureau of Mines investigated the Ketchem Dome Tin Prospect in east-central Alaska to evaluate the tin resource. The studies included field invest...
Report of investigations (United States. Bureau of Mines) ; 9065
Description:
"As part of its program to help decrease the dependency of the United States on foreign imports of nonfuel minerals and to devise technology for the e...
United States. Bureau of Mines. ; Franklin Institute (Philadelphia, Pa.). Research Laboratories. ;
Published Date:
1987
Series:
Report of investigations (United States. Bureau of Mines) ; 9079
Description:
"This report describes laboratory studies conducted by the Bureau of Mines on the spontaneous combustion of U.S. coals. Approximately 11 pct of U.S. u...
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