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Calculate Core Recovery and RQD by Yeff 14 is a document available to read on EtoBox.

What is Calculate Core Recovery and RQD about?

The document describes how to calculate core recovery and Rock Quality Designation (RQD) from rock cores. Core recovery is the total length of recovered core divided by the total core run length as a percentage. RQD only includes core pieces over 100mm summed and divided by core run length, excluding weathered or altered pieces. An illustration shows how to measure these values and a table correlates RQD values to descriptions of rock quality from very poor to excellent.

Author

Yeff 14

Language

EN