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Case Studies & Conference Papers  

This library contains Orica Mining Services published Conference Papers and Case Studies in downloadable PDF format.


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Managing blast vibration whilst increasing tunnel advance rates
Managing blast vibration whilst increasing tunnel advance rates

Toyota City is located in north-central Aichi Prefecture, Japan.
With some low lying areas of Toyota City prone to flooding, Kajima Corporation were contracted to excavate the Anei River tunnel to increase drainage capacity. With granite rock too hard for excavation, blasting was the obvious solution however, the tunnel ran directly beneath a residential area.
Orica proposed the use of the eDev™ II Electronic Blasting System combined with Orica’s SHOTPlus™ T software for design, modelling and vibration analysis. The Multi Deck Blasting technique was also used to allow Kajima to blast through the most sensitive areas of the project with half the amount of blasts that might have been required using the conventional blasting technique, minimizing delays to both neighbors and construction activities, wiping months off the project’s critical path.

Reduction in total blasting cost of mine using Electronic Detonators
Reduction in total blasting cost of mine using Electronic Detonators

From the days when plain detonators and safety fuse were used for initiation of commercial explosives, the commercial blasting and mining industries have made rapid strides.
With the advent of electronic detonators in the late 90s, the face of commercial blasting was forever. The Indian mining industry initially took a while to embrace Electronic Blasting Systems (EBS) however, more recently the industry has taken to EBS in a big way.

Though electronic detonators have grown in prominence in India in the last decade; their use has been restricted mainly to environmental control. With increased knowledge and understanding of the recent developments in blasting around the world, EBS in India has now started being perceived as a tool to improve productivity and reduce cost.

Cost, productivity optimisation through blast planning, scheduling

An optimised blast plan developed between one of Australia’s largest aggregate companies Boral and Orica at a Queensland quarry has delivered significant improvements to the operation’s annual extraction plan. Karen Normanton outlines how the two parties were able
to optimise blast performance, improve size and shape and reduce costs per tonne of rock.

Enhanced Borehole Camera
Enhanced Borehole Camera

The Enhanced Borehole Camera (EBC mkIII) combines a number of capabilities from other
instruments into one unit. The unit is capable of measuring depth, hole diameter, and hole temperature
at the same time as recording video footage. Postprocessing allows this data to be combined to produce
a final video with the telemetry synched to the video footage.

Blasting of Large Vertical Rock Protrusions

During free-dig excavation works in the south-western pit development area in the latter half of 2013, it was
discovered that several large protrusions of fused basalt columns were present along the pit face side of
the overburden stripping works. These protrusions created an issue for the quarry as the rock was solid enough to require blasting as they could not be broken down efficiently with a rock hammer, and were quite large in size (between 6- 10m diameter, and 5-7m high).


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