Equipment and practice at mine near Kittanning, Pa, operated on 3-shift basis in development; 2 shifts take coal and one takes 40 in. of top or bottom rock; rock is loaded into shuttle cars by crawler loaders, is hauled to loading station, dumped into mine care and transported to outside in same manner as coal; design details of shuttle car; longest practicable shuttle car haul in entry work is 400 ft; can be increased to 500 ft in rock work.
Entry driving with cable reel shuttle cars
Coal Min
Coal Mining ; 18 , n 5
1941
2 pages
Article (Journal)
English
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Engineering Index Backfile | 1949
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