Seismic Imaging
S-scan seismic 3D geophysical imaging data used to show potential risk
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The Challenge
- Detect voids within the subgrade that could collapse during mining
- Improve understanding of rock hardness to optimize drilling and blasting operations
A South African iron ore mine was in need of a technology solution that was minimally invasive that could detect voids and improve rock hardness estimates to optimize their field drilling and blasting operations.
The Solution
To address this challenge, Geocomp deployed its S-scan passive seismic 3D imaging system. This technology collects data from passive and active excitation to develop maps of shear wave and compressional wave velocities with depth. Geocomp’s engineers used these data to identify anomalies that can represent potential voids or weaker rock zones. These zones pose a substantial risk for collapse when mining is performed adjacent to them.
A blind surface wave tomography survey detected several anomalies. The boring data that were subsequently provided closely matched the interpreted anomalies validating the technology’s accuracy.
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