DRILL & BLAST
Seeking some input on the current state-of-the-art and likely future of the blasting sector, Jon Lawson speaks with one of the world’s most renowned professionals
Auf der Suche nach Informationen über den aktuellen Stand der Technik und die zukünftige Entwicklung von Sprengungen im Rahmen des Bergbaus spricht Jon Lawson mit einem der weltweit angesehensten Experten
Buscando algunos aportes en el estado actual de la técnica de vanguardia y del futuro probable del sector de la voladura, Jon Lawson habla con uno de los profesionales más reconocidos del mundo
EXPERT OPINION S
ince graduating with a Mining Engineering degree from IIT, Kharagpur, India in 1979, Partha Das Sharma has been a researcher and
prolifi c author of technical papers about blasting. He is also a consultant, and over the years has worked with many of the major explosives organisations. Catch his blog at https://miningandblasting.wordpress. com.
What are the key ways to improve blasting effi ciency?
Partha Das Sharma: One of the ways to increase the eff ectiveness of drilling and blasting operations is the improvement of blast hole design and column charges in hard rock operations. Blast design with computer simulations will become increasingly in vogue. Also, explosives quality will play an important role along with precise, digital initiation systems. Moreover, accurate drilling with measure while drilling (MWD) techniques will give more detailed information about strata conditions. Combining all these will give rise to more environmentally friendly, effi cient blasts that are more optimised.
Outline the new Burn-Cut blast system – what problems does it solve?
PDS: A new Burn-Cut blast pattern has been designed for drives, declines and ramps in underground metal mines, to replace a Decked-Burn design (with more holes), a system that was giving too many blast
6
www.engineerlive.com Blasting at an open-pit mine
failures. T e Decked system has been removed to make the charging operation easier. T is enables an increase in explosives energy in a hole and reduced stemming length in order to eliminate the ‘under blast’ failure problem. T e number of detonators required
is reduced. T e total explosives quantity has also been marginally reduced. T us, drilling effi ciency, ease of charging and greater cost eff ectiveness has been achieved.
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