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In Situ Stresses & Stress Measurement

metres below ground surface and is the unit weight, measured in MN/m 3. As a rule of thumb, taking the average density of rock into account, 40 m of overlying rock induces 1 MPa stress. Hoek & Brown (1980) 12 of 64 Erik Eberhardt – UBC Geological Engineering EOSC 433 (2017) Estimation of In Situ Stresses - Horizontal

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