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Category :
Languages : en
Pages : 134
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Book Description
Author:
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Category :
Languages : en
Pages : 134
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Book Description
Author: Skelly and Loy
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Category : Mine haulage
Languages : en
Pages : 130
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Book Description
It is the objective of this study to assess the feasibility of new or novel underground haulage equipment for transporting personnel and supplies. The study analyzes novel equipment and conventional haulage systems to determine their relative impact on productivity and the cost per ton that is attributable to this segment of the mining operation. Novel equipment in its current design can potentially alleviate many of the personnel and supply problems encountered in United States coal mines. A review of rail haulage systems and European underground mining provides the basis for the introduction of three novel haulage systems: monorail, floor-mounted trapped rail haulage, and chairlifts. It was determined that monorail and floor-mounted trapped rail haulage systems exhibit the highest potential for domestic utilization with the floor-mounted system already in use in one Pennsylvania mine. Monorail haulage equipment along with conventional battery powered rubber-tired equipment and two rail haulage systems were theoretically applied to five different mine sizes. Each system was then reviewed on an economic, operational, maintenance, and safety basis. From each standpoint, the monorail compared favorably with the other haulage systems. MSHA personnel reviewed the available technical and performance data, theorizing that the inherently safe design of trapped rail haulage equipment should prevent the need for any new regulations that would pertain to the equipment. Industry spokesmen exhibited interest in determining how trapped rail haulage equipment could benefit their mining operations
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Category : Fossil fuels
Languages : en
Pages : 806
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Category : Power resources
Languages : en
Pages : 368
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Author:
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Category : Power resources
Languages : en
Pages : 562
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Category : Aeronautics
Languages : en
Pages :
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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Category : Fuel
Languages : en
Pages : 356
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Book Description
Author: Lester A. Hoel
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Category : Human engineering
Languages : en
Pages : 268
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Author:
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Category : Fuel
Languages : en
Pages : 752
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Book Description
Author: Zachary M. Schrag
Publisher: JHU Press
ISBN: 1421415771
Category : Architecture
Languages : en
Pages : 380
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Book Description
As Metro stretches to Tysons Corner and beyond, this paperback edition features a new preface from the author. Drivers in the nation's capital face a host of hazards: high-speed traffic circles, presidential motorcades, jaywalking tourists, and bewildering signs that send unsuspecting motorists from the Lincoln Memorial into suburban Virginia in less than two minutes. And parking? Don't bet on it unless you're in the fast lane of the Capital Beltway during rush hour. Little wonder, then, that so many residents and visitors rely on the Washington Metro, the 106-mile rapid transit system that serves the District of Columbia and its inner suburbs. In the first comprehensive history of the Metro, Zachary M. Schrag tells the story of the Great Society Subway from its earliest rumblings to the present day, from Arlington to College Park, Eisenhower to Marion Barry. Unlike the pre–World War II rail systems of New York, Chicago, and Philadelphia, the Metro was built at a time when most American families already owned cars, and when most American cities had dedicated themselves to freeways, not subways. Why did the nation's capital take a different path? What were the consequences of that decision? Using extensive archival research as well as oral history, Schrag argues that the Metro can be understood only in the political context from which it was born: the Great Society liberalism of the Kennedy, Johnson, and Nixon administrations. The Metro emerged from a period when Americans believed in public investments suited to the grandeur and dignity of the world's richest nation. The Metro was built not merely to move commuters, but in the words of Lyndon Johnson, to create "a place where the city of man serves not only the needs of the body and the demands of commerce but the desire for beauty and the hunger for community." Schrag scrutinizes the project from its earliest days, including general planning, routes, station architecture, funding decisions, land-use impacts, and the behavior of Metro riders. The story of the Great Society Subway sheds light on the development of metropolitan Washington, postwar urban policy, and the promises and limits of rail transit in American cities.
