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What is Rock Quality Designation (RQD) Analysis about?

The document describes the Rock Quality Designation (RQD), which provides a quantitative measurement of the quality of the rock mass based on drilling samples. It explains how RQD is calculated by counting the length of fragments longer than 10 cm, and how this index classifies rock quality from very poor to very good depending on the percentage obtained. It also covers how to estimate RQD in rock outcrops by counting discontinuities, and identifies factors such as cracks with infill.

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ScribdTranslations

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EN