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Technique for blasting relatively large areas to comparatively shallow depths for easy mechanical excavation by 3/4 cu yd shovels generally used in New Zealand; use of crawler drills; Cordtex blastings carefully planned with delays to move rock in definite pattern; holes should be deep enough to produce rock pile high as shovel's shipper shaft; list of typical paddock blastings at Roxburgh.
Technique for blasting relatively large areas to comparatively shallow depths for easy mechanical excavation by 3/4 cu yd shovels generally used in New Zealand; use of crawler drills; Cordtex blastings carefully planned with delays to move rock in definite pattern; holes should be deep enough to produce rock pile high as shovel's shipper shaft; list of typical paddock blastings at Roxburgh.
Paddock blasting in New Zealand
Water Power
Hallewell, G.J. (author)
Water Power ; 11
1959
5 pages
Article (Journal)
English
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