With introduction of trackless mining there has been increase in problem of delivering men and supplies to working face; at mines of Consolidation Coal Co, Ky, wide variety of conditions had to be overcome; in many cases, use of tractors and trailers for transporting supplies or men, a portion or all of distance, seems to be better method.
Tractors and trailers for supply haulage
Min Congress J
Mining Congress Journal ; 35 , n 5
1949
Article (Journal)
English
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