Understanding sub-surface structures and formation mechanical properties are vitally important to any excavation or construction project, being able to measure these in-situ even more so….

Downhole logging offers the ability to rapidly acquire in-situ, high-resolution data sets that when correctly processed and interpreted can yield correctly orientated structural information and formation mechanical properties including:

• Fault, shear and fracture orientations and classifications

• Bedding and foliation orientations

• Fracture frequencies and RQD

• Continuous dynamic elastic moduli (calculated from density and sonic velocities)

• Site-calibrated geohazard indices

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Borehole Radar

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Digital Surveying deploys Helix Geotech fully memory-based borehole radar to image structures tens of metres into the formation.

Common applications include:

• Blast holes - integrated into mining process providing an ‘early warning’ rolling map to optimize ground support

• Cover holes - imaging water / methane-bearing fissures and hazardous anomalies ahead of mining

• Geological holes - imaging mineralised reefs ahead of mining

• Pilot holes for shaft & raise bore - mapping structural and geotech information

• Mine development planning - 3D block modelling of mineralized reefs and identifying anomalies such as potholes

• Tunnelling - fracture, void & metal object detection

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