Datareport corelogging KH-01-2018

Abstract

KH-01-18 is a core drilled bore hole at the west flank in the Åknes rock slope. The bore hole is 222.6 meter deep, and was core drilled during July to August 2018. Geodrilling AS performed the core drilling on assignment from Norwegian Water- and Energy directorate (NVE). Lise Tønset (NTNU) and Henrik Langeland performed engineering geological core logging in November-December 2018. The rock type registered in KH-01-2018 is gneiss with variation in grain size and colour according to classification from ISO 14689. The core logging shows that the core is intersected with crushed zones in the upper 50-60 m. In this section also 2 intervals with core loss are registered. From 60 m to about 160 m depth there is no presence of crushed zones >10 cm, however RQD and fractures/meter (FFm) values are varying. From about 160 m to end of bore hole the rock mass is considered solid with a massive character. No crushed zones are registered and the rock mass is generally considered good, evaluating RQD- and FFm values.