Minimising the Impacts of Blasting

Dyno Nobel’s ethos is to work in partnership with our customers, earning us the enviable reputation of being a trusted global partner. We listen to our customers’ needs and work with them to tailor an approach in delivering ground breaking solutions.

The use of ammonium nitrate based bulk explosives during blasting activities is well known and widely used throughout the world today. A known risk associated with these products is the generation of excessive nitrogen oxides (NOx).  While a number of factors have been identified that can contribute to excessive NOx generation, these contributing factors can change from site to site and blast to blast. As NOx emissions can have significant environmental, health, safety and community impacts, we have been a leader in researching and developing new and improved products and blasting methods to reduce NOx emissions since 2007. Last year we launched Titan 9000xero, a new reduced energy, bulk explosive which contains a high performance emulsion, Titan 9000, blended with a specialised bulk additive formulated for reducing NOx fume. This year Titan 9000xero was tested in Eastern Australian mines in soft, wet tertiary material which is frequently associated with excessive NOx generation during blasting. The results continued to impress: no NOx emissions have been recorded to date. Read our 2015 Case Study: Controlling Fume Generation with TITAN® 9000xero®

The practical innovation of Titan 9000xero is not only reducing NOx fumes, but also making our communities and environments safer. It is specially designed for use in soft, wet/damp ground conditions, frequently associated with excessive NOx generation. The flexibility to deliver Titan 9000xero in changing ground conditions is critical. This product can be delivered into dry or dewatered blast holes using an auger, or pumped into the bottom of wet blast holes. Titan 9000xero is a water resistant, flexible solution for reducing the risk of excessive NOx generation, solving the challenges many of our clients are facing.

Ground vibration and noise are also impacts that our customers are seeking to reduce, both for the community and for health and safety reasons. We are responding by training our customers in the use of electronic initiation system technology. This technology allows the more accurate detonation of a single blast hole, which in turn allows the use of a computer model to reduce the blast-induced shock waves that are transmitted through the ground. The detonations of each blast hole can be programmed to introduce interference between the shock waves, thus reducing the vibration that is felt. Read our Case Study ‘Making Way for Increased Production of Hydroelectric Power in Southern Vermont’ as one example of the application of this technology.

 

During 2015, our Explosives technology team has continued to test and develop another solution to optimise blast performance and reduce impacts. Differential Energy is a proprietary explosives method which allows blasters to accurately vary the density of chemically gassed emulsion as it is being loaded into the blast hole. This allows the operator to load multiple densities of gassed emulsion into the same hole in order to match the unique geological characteristics present in the ground. Because the explosives energy is precisely targeted to match the rock properties, the amount of energy loaded in the top portion of the blast hole can be reduced, which reduces vertical movement at the surface, resulting in less air overpressure and noise from the blast event, as well as improving air quality, mine productivity, rock fragmentation and dig-ability. Read our 2015 Differential Case Study: Trial Leads to Continuous Improvements For Mine.

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Use of Differential Energy in 2015 has continued to result in reduced NOx emissions, reduced energy use, less noise and ground vibration and increased productivity while reducing overall costs for our mining customers.