Certificate In Rock Mechanics Exam Practice Questions - Certificate In Rock Mechanics (South Africa) Exam

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According to Hoek and Brown, the Geological Strength Index (GSI) is primarily estimated from which two visual geological observations?

Intact rock hardness and groundwater discharge rate Rock mass structure (interlocking of rock blocks) and surface condition of discontinuities Drilling rate index and uniaxial compressive strength Joint aperture width and seismic wave velocity

Correct Answer:

Rock mass structure (interlocking of rock blocks) and surface condition of discontinuities

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