Results of introducing modified longwall system of mining, loading coal mechanically and using conveyors to afford means of continuously transporting coal from working face to tipple; advantage of described system over room-and-pillar and over ordinary longwall mining.
With hand shoveling 10 tons per man and 26 tons per loader already attained
Ry. Mech. Engr
Railway Mechanical Engineer ; 98 , n 2
1924
7 pages
9 Figs.
Article (Journal)
English
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