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Real-time tailoring of explosive energy a reality

BENCH IT Blasting has traditionally been considered in three dimensions (width, length and depth); however, decisions on the application of explosives are often one-dimensional

BULK MUSCLE Relative bulk strength is a measure of the energy of an explosive, per unit volume

21st October 2022

By: Leah Shelene Asaram

Features Reporter

     

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Mining and infrastructure solutions company Orica notes that its “revolutionary” 4D bulk system is available for surface mining, and is being trialled for underground mining, with subsequent market introduction planned for 2023.

4D capability, having been introduced to Australia and Indonesia in 2022, will be made globally available through 2023, with “foundation customers” being lined up across North and Latin America.

Released in September last year at MINExpo in Las Vegas, in the US, the 4D bulk system allows for the real-time tailoring of explosive energy, based on geology, across a blast.

Orica Europe, Middle East and Africa VP Victor Morales says blasting has typically been considered in three dimensions (width, length and depth), but blast application decisions were often one-dimensional, not accounting for differences in geology.

“This essentially means that the same explosive blend and product density are applied to every blast hole across a blast pattern.”

The 4D technology, meanwhile, enables the drill-and-blast engineer to design blasts based on the geology and the energy required, consequently allowing for the lowest cost explosives to be loaded while maximising blast outcomes, explains Morales.

Further, with 4D capability, formulated with Orica’s proprietary emulsion blended with ammonium nitrate porous prills, the company has enabled customers to access a wider range of energy explosives in wet, dewatered and dry blast holes, thereby delivering optimised explosive energy that is matched to the desired blast outcome.

The 4D bulk explosives can be loaded through pumped and augured methods, ensuring greater bench productivity through Orica’s fleet of 4D-enabled explosives delivery systems or mobile manufacturing units.

Key Benefits

Morales states that 4D ensures that only the required amount of energy is applied to every blast hole, delivering consistent fragmentation for the lowest possible cost. This maximises fragmentation, which can increase productivity while reducing costs.

He says this consistent fragmentation drives excavation productivity and downstream processing, which often translates to increased throughput, and/or reduced energy consumption.

Another benefit is that 4D’s increasing energy facilitates the expansion of blast patterns allowing for more efficient use of drills and on-bench personnel.

4D also loads lower energy products into wet holes, which are better matched in terms of rock strength, while maintaining effective water resistance and reducing the risk of fumes caused by overblasting in soft geology.

Further, Morales notes that the bulk technology delivers up to 43% reduction in relative bulk strength for soft-rock or technical applications, and up to 23% more energy for hard-rock applications, compared to Orica’s current Relative Bulk Strength-based product ranges.

Additionally, when integrated with Orica’s BlastIQ suite of digital blast optimisation technologies, customers can gain a deeper understanding of the geology and blast hole conditions to maximise 4D capabilities and effectiveness.

“The development of 4D reinforces Orica’s commitment to technological innovation and is in line with our customer-centric technology roadmap and vision of transforming drill-and-blast operations to unlock greater mining value, and create safer and more productive blast outcomes,” Morales concludes.

Edited by Nadine James
Features Deputy Editor

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