Search Documents

By G. Richard Dreese, Harold L. Bryant

The coal mining industry has had a long history of successfully externalizing part of its costs. Thus the private or internal costs of coal mining have been minimized and the social or external costs have been ignored. The externalized costs have largely taken the form of water pollution from acid mine drainage and sedimentation of stream channels from eroding spoil banks and gob piles. The environmental problems created by strip mining are very conspicuous, so the public demand for legisla-

Jan 1, 1975

By L. S. Panyity

THE Cleveland (O.) gas pool described by Frank R. Van Horn,1 is the northern extremity of the great "Clinton" sand gas development in LAKE ERIE General Trend of "Clinton" Sand Pools in Ohio Richland Township, Vinton County FIG. 1. Ohio. Numerous gas pools have been developed in this formation, which are now more or less connected, link by link, forming an almost' continuous gas pool, starting at Cleveland, and running thence southward through Cuyahoga, Medina, Wayne, Ashland, Richland, Knox, Licking,

Jan 6, 1917

By Ira A. Stark

Use of clay-working machinery in the metallurgical industry is by no means new. Extrusion- agglomeration as a basic operation in the non-ferrous field has a history of more than 50 years. This article advocates using the technique in the ferrous field where it might serve a useful purpose in today's operations. Many of the processes involved in production of iron ores result in fine powders, with a considerable percentage running finer than 200 mesh. In many instances, mining and related processing operations are located far from furnace operations. Shipping the powdered ore is impractical since handling losses and furnace losses from dusting would be excessive and powdered material must be agglomerated. The agglomerate must withstand the handling involved in transportation and here the continuous pugmill-extruder can be used to form a strong dense product.

Jan 6, 1959

Extractive Metallurgy Division Institute of Metals Division Iron and Steel Division Council R R McNaughton, Chairman (EMD), Ernest O Kirkendall, Secretary, J H Scaff, (IMD), Morris Cohen, (IMD), T J McLoughlin, (ISD), J S Marsh, (ISD), P T Stroup, (EMD), R D Parks, (MED), D S Eppelsheimer, (MIED) Journal of Metals Editorial Advisory Committee J S Smart, Jr, Chairman, W A Dean, T D Jones, Evan Just, J C Kinnear, Jr, J S Marsh, M Tenenbaum Pacific Northwest Regional Meeting F X Cappa, General Chairman, W W Wiltschko, Chairman (Metals Branch), Program Chairmen H E Lee (EMD), S E Maddigan (IMD), G R Heffernan (ISD), L C Richards (Ind Min Div), James Bell (Finance Committee), Ed Vestica (Registration), Donald Johnson (Special Events)

Jan 1, 1954

By S. Whinery

I am indebted to L. E. Bryant, of Danville, Ky., President of the Virginia Mining Co., operating coal-mines in Scott county, Tenn., for the following information relating to the existence of the Clinton iron-ore under the NW. slope of the Cumberland Plateau in Kentucky and Tennessee. During the past 15 years quite an important oil-field has been developed in a region having Wayne county, Ky., as its center, and a large number of wells have been drilled in that and adjacent territory in the search for oil. Many of these wells have been carried to considerable depths below the recognized oil-bearing horizon, and one of them was drilled by Mr. Bryant at Pine Knot, a station on the Cincinnati, New Orleans & Texas Pacific railroad, a few miles north of the point where that road crosses the Kentucky-Tennessee State-line. The elevation of

Jan 1, 1913

The Institute is custodian of funds for support of numerous gold medals and prizes and has representatives on boards awarding still others. Details regarding the Institute Awards are given below. The Institute is represented on the boards of the John Fritz Medal, the Hoover Medal and the Washington Award, in connection with the three national societies of Civil, Mechanical and Electrical engineering; and, also, in the case of the Washington Award, with the Western Society of Engineers.

Jan 1, 1923

The Mexican Government is building a mill at Churunibave in Sonora to handle lead, zinc, and copper ores. This development was sparked by increased mining activity in Mexico and Arizona caused by the Korean war. Pickands Mather, acting for a group of iron ore producers, is negotiating an agreement with Steep Rock Iron Mines, Ltd. to explore and perhaps lease iron ore property covering more than 1000 acres in the Steep Rock Lake area in Western Ontario. Plans call for the early commencement of an exploratory program. Other members of the group by Pickands Mather are Bethlehem Steel, Youngstown Sheet & Tube, the Steel Co. of Canada, and Interlake Iron Corp.

Jan 3, 1951

A PROSPECTOR stood atop a Venezuelan mountain called El Florero just 25 years ago, and shouted to the world that he had found a large, rich new source of iron ore. But his words were lost in the big green South American jungles and besides, the world had more iron ore than it could handle. There were no crises in 1926, no major wars on the horizon, no worries about mineral supplies. In the U. S., the populace was "keeping cool with Coolidge," and the solid foundation of the economy-the steel industry-rested on a still firmer basis, the Lake Superior iron ores.

Jan 5, 1951

By B. H. Mot

Underground water has been one of the greatest problems in sinking mine shafts, sealing existing shafts, and driving headings under streams. In the preparation of a proposed shaft or existing shafts for elimination of water leakage, advances have been brought about through the use of a controlled grouting method. The modern method to divert water from proposed shaft sites is known to us as pre-grouting, and from existing shafts, as controlled pressure grouting. This method involves the solidification of the surface and rock by the injection of a liquid mixture of

Jan 1, 1949

By J. P. Zannaras

Referring to the article by R. J. Charles and P. L. de Bruyn, let us assume that W = weight of glass bar; P = weight of hammer; e = total deformation; E = unit of deformation; K = potential stress energy; E = modulus of elasticity; L = length of the bar; 7, = coefficient of inertia; h = height, ft; V = velocity, fps; and a = cross section area. The portion of kinetic energy which is effective in producing stress energy in a fixed bar struck horizontally is given by the formula [ ]

Nov 1, 1956

THE term mountain bump describes the sudden rupture of one or more coal pillars under excessive stress. These bursts occur with varying degrees of violence and sometimes include adjacent strata, especially the bottom rock. Many failures do not develop enough violence to be dangerous and are regarded as an aid to coal production, but severe occurrences are accompanied by tons of flying coal, dense clouds of dust, and excessive gas emission. Such bursts sometimes throw heavy machinery several feet. Major factors to be considered in the problem are the nature of the strata above and below the seam and the depth of cover. Bumps are classified as to their nature, extent of damage, and point of occurrence, e. g., face bump, coal bump, high side bump, low side pavement bump, and district bump.

Jan 8, 1958

By Freeman Bishop

Elburt F. Osborn's scholarly look doesn't prevent his keen insight into human beings and practical affairs of the world from coming through strong and clear, as it did in an exclusive interview with this reporter a half-hour after Dr. Osborn was sworn in as director of Interior's Bureau of Mines. An internationally recognized authority on geology and mineral resource development, Dr. Osborn won his Ph.D. at the California Institute of Technology. Since 1959, he has been vice president for research at Pennsylvania State University, where he originally joined the staff as professor of geochemistry in 1946 and also served for six years as dean of the College of Mineral Industries.

Jan 1, 1971

Department of Forestry and Geological Development, 435 State Capitol, Atlanta, Ga. S W. McCalhe, State Geologist. A complete list of Bulletins of the Geological Survey of Georgia will be sent upon request. Forty-five Bulletins have been issued, most of which deal with the mineral deposits of the state and are still available; they may be had on payment of postage. The subject matter of those bulletins of most interest is indicated in the following list, with the year of issue and the mailing weight. Bulletin 1, Marbles (1894), 3 lb , 8, Road building materials (1901), 3 lb , 9, Granites and gneisses (1902), 2 lb ; 10, Iron ores (1900), 2 lb , 11, Bauxite (1904), 2 lb.; 12, Coal deposits (1904), 2 lb ; 13, Ocher deposits (1906), 2 lb.; 14, Manganese deposits (1908), 2 lb ; 17, Fossil iron ore (1908), 2 lb.; 18, Clay deposits

Jan 1, 1933

Discussion of the paper of Earl S. Bardwell, presented at the Butte meeting, August, 1913, and printed in Bulletin No. 79, July, 1913, pp. .1429 to 1441. H. O. HOFMAN, Boston, Mass. (communication to the Secretary*) :-It is pleasing to the originators of the planimetric determination of oxygen in refined copper to see that the method has been taken up by a large smelting plant to be used in every-day work after it has been simplified to suit the new conditions. Several years ago Huntington and Desch 1 had improved our mode of working. They projected the developed negative on to a screen, traced the outlines of the picture with a pencil, drew a border, and measured one constituent with. the planimeter. In order to give the work greater precision, they divided the area into squares of 1 cm. side, shaded the

Jan 11, 1913

New equipment for seabed sampling, presently at the prototype stage, operates on the principle of diamond core drilling with wire line core barrels and is designed to drill cores from the seabed at depths down to 200 m with a continuous recovery of cores from an attendant vessel. The machine operates on the seabed by remote control from a console on the vessel. Neither installation nor operation requires the use of divers. Principal Applications Principal areas of application for the drill which is dubbed Maricor include investigation drilling in the continental shelf, mapping geological conditions before large drilling platforms are installed and exploring proposed undersea tunnel routes.

Jan 11, 1973

By R. E. Hucko

Introduction The principal thrust of the US Department of Energy (DOE) coal preparation R&D program is to develop technology to reduce ash and sulfur content of US coals to levels where the resultant product can be formulated into a high quality solid or slurry fuel that could replace oil or natural gas in both new and retrofit applications. The coal preparation program is implemented by the Pittsburgh Energy Technology Center (PETC) and is conducted both in house and by a cross section of industrial organizations, universities, and national laboratories. Research is subdivided into three areas - coal characterization, beneficiation, and ancillary unit operations.

Jan 1, 1985

By David LeCount Evans

Not only E. B. Mayo but also W. C. Lacy, who apparently urged the preparation of this analysis, is to be commended. Regional thinking of this type is needed to assure future success in the never-ending search for new mineralized and petroliferous districts. As is usually the case, here is a regional study that will be read by the mining geologist alone. It is ironic that several of the trends established in this study have suggested themselves in northern mid-continent, detailed, and regional studies. These, where established, have offered new keys to petroleum exploration and have provided a possible basis for unraveling a number of broad generalities. The oil geologists, active in Colorado, Kansas, and Oklahoma, would find much food for thought in Mr. Mayo's projections.

Jan 6, 1959

THE late steel strike resulted in an unusual reversal of field when Brazilian interests shipped steel to the United States to assure completion of a blast furnace under construction in Cleveland for the national Volta Redonda mill. The furnace is one of the key factors in an expansion program scheduled to raise Brazilian steel production by 280,000 tons, bringing annual output to 1 million tons. The first consignment shipped to Cleveland included 500 tons of slab and plate steel, and was followed later by another 300 tons. Brazil wants to blow in the furnace by July 1, 1953, and the restricted allocation system brought about by the steel shortage offered a real threat to the deadline. Volta Redonda, established during World War II by Brazilian and American financing, accounts for more than half of Brazil's steel production.

Jan 1, 1952

By C. H. Reynolds, Robert C. Pruess

Late in 1954 exploratory drilling indicated a substantial orebody on the Rattlesnake claims of Woodmont Inc., a Continental Uranium Inc. subsidiary. Woodmont holdings are located about 35 miles southeast of Moab, Utah. Only a few miles north of Big Indian Valley and other Chinle-sand uraninite deposits, the claims are in an entirely different geologic environment. Detailed development drilling continued until the Deep North orebody was outlined, covering an area approximately 300 x 450 ft. All exploratory drilling and about 80 pct of development drilling was wet core. Chemical assays for each hole sample, applied at 1-ft intervals against the measured core length, were put into a conventional ore calculation formula. Forty-six holes were drilled to delineate the Deep North orebody.

Jun 1, 1956

By D. V. Fites

The ripper is not a new tool. In fact, it dates back as far as the Roman Empire. The Roman's ripper-mounted on wheels and shaped something like a plow-was pulled by oxen and was used to loosen the earth for the shovelers and basket carriers building the Appian Way. There are records of rippers being used in this country in railroad construction between 1860 and 1880. The tractor-mounted ripper, introduced a little over ten years ago, extended the capability of the ripper because of greatly improved maneuverability and the additional weight which could be brought to bear upon the ripper tooth. Increases through the last ten years in tractor weight and horsepower further increased ripper capability until now, in some geographic areas, hardly any rock is unchallenged by them.

Jan 12, 1967