Overburden removal with draglines at mines of Maple Hill Coal Co in Pennsylvania makes profitable contour mining of four seams possible: seams are 38, 28, 24-36, and 30 in. thick; mines produce 200,000 tons/yr of medium volatile coal; coal from pits is loaded by diesel powered shovels in 15 ton trucks; blasting, loading and haulage, preparation and shipping, operation and maintenance of mine.


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    Title :

    Stripping coal from four seams


    Additional title:

    Mechanization


    Contributors:
    Hunt, J.W. (author)

    Published in:

    Mechanization ; 24 , n 9


    Publication date :

    1960


    Size :

    4 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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