Deepest operating mine in Illinois, Jefferson No. 20 (formerly Nason) has been mechanized with loading machines and shuttle cars following its reopening in 1938; with coal 5 1/2 to 8 1/2 ft thick under 740 ft of cover, thick pillars are left on advance and split on retreat; seam is broken down with Cardox shells; sketch of panel, showing method of working rooms and splitting pillars.


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    Titel :

    Loaders and shuttle cars


    Weitere Titelangaben:

    Coal Age


    Beteiligte:
    Given, I.A. (Autor:in)

    Erschienen in:

    Coal Age ; 45 , n 4


    Erscheinungsdatum :

    1940


    Format / Umfang :

    4 pages


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Extraction of stoops by shuttle cars and loaders

    Haldane, D. | Engineering Index Backfile | 1947


    Tracklaying shuttle cars

    Cross, R.N. | Engineering Index Backfile | 1952


    Safety with shuttle cars

    Kincell, K.K. | Engineering Index Backfile | 1949


    Wheel loaders

    Tema Archiv | 2001


    Shuttle cars from autos

    Edwards, J.H. | Engineering Index Backfile | 1953