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ROCK QUALITY DESIGNATION [1 record]

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Record 1 2010-04-08

English

Subject field(s)
  • Petrography
CONT

Because of the wide scope of rock mechanics, as yet there is no system of rock classification that is acceptable to all users of rock mechanics ... The Rock Quality Designation (RQD) is [a] system based upon the total length of core pieces exceeding 4 in. (10.16 cm) that are recovered in one core run. Thus, in a core run of 60 in., if there is a total of 25 in. of core pieces with lengths greater than 4 in., the RQD would be (25/60) X 100 or 41%. These latter values, then, are related to rock quality ...

French

Domaine(s)
  • Pétrographie
OBS

Selon un professeur de géologie à l'Université Laval, on utilise en français l'abréviation «RQD» pour désigner le «Rock Quality Designation».

Key term(s)
  • qualité de la roche

Spanish

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