Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Blasters Realizing Value of Longer Delays Allowed by Electronics
Explosives supplier BME recently called attention to an ongoing mining-industry transition from non-electric to electronic delay detonators (EDD), a trend that the company said has brought many benefits to mining productivity. However, according to BME, there are still plenty of advantages to be gained by blasters who are prepared to think outside the box. That was the message from BME's technical director, Tony Rorke, who addressed the focus in recent years on the flexibility in blast timing that EDDs allow--and more specifically on the value of longer timing delays. The result of these in-hole delays was that surface delays had to be notably shorter, to ensure an adequate "burning front--so standard delays most commonly used today for surface connections are 17, 25, 42 and 67 milliseconds. These delay periods are generally suitable for hard rock, but the shorter periods increase the risk of out-of-sequence firing or blast choking, due to the inaccuracy of the longer in-hole periods.
Blasters Realizing Value of Longer Delays Allowed by Electronics
Explosives supplier BME recently called attention to an ongoing mining-industry transition from non-electric to electronic delay detonators (EDD), a trend that the company said has brought many benefits to mining productivity. However, according to BME, there are still plenty of advantages to be gained by blasters who are prepared to think outside the box. That was the message from BME's technical director, Tony Rorke, who addressed the focus in recent years on the flexibility in blast timing that EDDs allow--and more specifically on the value of longer timing delays. The result of these in-hole delays was that surface delays had to be notably shorter, to ensure an adequate "burning front--so standard delays most commonly used today for surface connections are 17, 25, 42 and 67 milliseconds. These delay periods are generally suitable for hard rock, but the shorter periods increase the risk of out-of-sequence firing or blast choking, due to the inaccuracy of the longer in-hole periods.
Blasters Realizing Value of Longer Delays Allowed by Electronics
2017
Aufsatz (Zeitschrift)
Englisch
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