This page contains a Flash digital edition of a book.
DRILL & BLAST Starts with a BANG High-energy bulk explosives deliver mining and milling improvements at Australian hard rock mine A


n innovative new range of high-energy bulk explosives has been introduced to the Australian market.


T e solutions are designed to deliver considerable fi nancial benefi ts for customers in hard rock metal mines. T e bulk explosive Vistis from


Orica produces over three and a half times the detonation pressure of ammonium nitrate/fuel oil (ANFO) at triple the relative bulk strength. T e energy levels generated and the speed with which they are released delivers optimal fragmentation that reduces overall operating costs either through pattern expansion (without impacting load and haul rates) or by providing broken stock that increases milling effi ciency. T e Vistis range is designed


specifi cally for wet blast hole applications. Alongside this, the Vistan range of bulk explosives is designed for use in dry and dewatered blast holes. When combined with the precision timing of Orica’s electronic blasting systems and its capabilities in drill and blast design, modelling and operational loading, the Vistis bulk system has the potential to deliver major fi nancial benefi ts.


Success at Mount Rawdon Orica has worked with Evolution Mining’s Mount Rawdon, Australia operation since the site’s commencement in 1998. In recent years, both parties have collaborated on a number of blasting-related business improvement initiatives. T is has included the introduction


12 www.engineerlive.com





The step change achieved from the Vistis system


has been a key enabler of the mine-to-mill success and achieving considerable value for Mount Rawdon


of electronic blasting systems, blast characterisation and optimisation projects, and training of site engineers and blast crews. Following on from this, the mine


has expressed interest in exploring the potential for increased mill throughput via a high-energy blasting solution. “Orica worked closely with


Mount Rawdon to understand what was important to the mine before


proposing changes. T e close working relationship, measurement of all the critical metrics around mining and milling, and changing the way we operated the milling processing all contributed to the results. T e step change achieved from the Vistis system has been a key enabler of the mine-to-mill success and achieving considerable value for Mount Rawdon,” states Mark Boon, general manager, Mount Rawdon Operations. Over the course of the trial, the


project was able to deliver mill throughput improvements of 6%, a reduction in specifi c energy of over 7% and dig rate increases of up to 15%. In waste domains, pattern expansion of up to 55% was also achieved, resulting in major operational and fi nancial improvements for the mine. ●


For more information visit www.oricaminingservices.com/vistis


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52