Schmidt Hammer to UCS
Estimate rock UCS from Schmidt hammer rebound number using three correlations: Miller (1965), Aufmuth (1973), and Katz et al (2000). Includes orientation correction.
Last updated 19 May 2026
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Mean of 10+ readings after excluding outliers >6 from median
Required for Miller correlation. Typical: 22-28 kN/m³
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