Accelerated driving of drifts and adits in phosphate mine by means of complete integrated train for mucking out heading round; train includes 5 1/2 ton bottom dump cars, diesel locomotive, two drum, air operated slusher hoist, bucket and pull back supporting sheave block on end bracket of train; muck is transferred from lead cars back along entire length of train.
For faster tunnel driving -- Meet whup d'whup
Eng Min J
Engineering and Mining Journal ; 157 , n 6 ; p 88-89
1956
2 pages
Article (Journal)
English
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