Topic: drilling and blasting of rock
(1) Design a coal overburden throw/cast blast for the following situation: a) Blast length 900 m b) Blasted bench width 100 m c) Bench height 20 m d) Overburden of shale/siltstone/sandy shale, average density 2.5 tonnes/m3 e) Standoff distance 1.5 m f) Wet holes g) Hole diameter 250 mm Design the blast pattern, […]
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Date: June 5th, 2015