A percussion drill is being prepared for dispatch to the Stockton area in the Buller district where open-cast mining is now being carried out on an extensive scale. This plant will drill shot-holes for the blasting away of overburden to permit the continuous working of a new, large mechanical shovel recently installed, and providing a revolutionary method in quick removal pf coal deposits from open-cast workings. Blast-hole drilling is done on a fairly big scale in some stone quarries throughout New Zealand, but this is the first occasion on which it is to be utilised on coal-producing areas. The drill will bore six-inch holes so that five-inch diameter explosive cartridges can be utilised, replacing much smaller charges at present being used.
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Bibliographic details
Press, Volume LXXXI, Issue 24745, 10 December 1945, Page 4
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121Untitled Press, Volume LXXXI, Issue 24745, 10 December 1945, Page 4
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