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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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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).

Removing overhanging face Oparure Road – Waitomo, New Zealand

Transfield Services Ltd. Infrastructure division (Transfield) provides road maintenance services to the Waitomo District Council (WDC) on the North Island of New Zealand. Transfield were recently engaged by WDC to rehabilitate pavement on Oparure and Haurua Road . An optimal blast design was formulated by taking data collected using a Measurement Devices Ltd’s (MDL) Quarryman laser profiler and importing it into Orica’s ShotPLUS 5 software.

Controlling Overbreak in Development Mining

Golden Grove is an underground and open pit base and precious metal mine owned by Minerals and Metals Group (MMG).The mine is currently extending the depth of its operations beyond 1000m. At these depths they are noticing that the quality of the rock is worsening and the foliation and alteration is increasing in complexity.
The fractured and jointed ground conditions at Scuddles have led to an increase in overbreak in the development drives, variation between the “as designed” volume and the “as blasted” volumes of some drives exceeded 30%. * Data sourced during benchmarking phase MMG Golden Grove management recognized that such high levels of overbreak were having a significant cost impost to the operation and have been working the GBF team to find solutions to reduce this level of overbreak.


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