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Published Thursday, July 01, 1999

There is growing evidence that commercial use of electronic delay detonators for quarry blasting is close at hand. Claimed benefits include improvements in vibration, air-blast control, fragmentation, digging productivity and highwall control. Faced with sharply rising regulatory and cost requirements, quarries, surface mines and construction operations around the world have been conducting an increasing number of trials of electronic detonators. Commercial use has been reported in Africa. In North America, which has the largest total number and greatest variety of such operations, numerous trials have been conducted over the past two years. Sources within the quarry industry report ...

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