Combined geophysical and hydraulic methods for 3D mapping of fractures and siting rock caverns in granite

Veijo Pirhonen

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

In order to determine the most suitable location for a set of rock caverns, the fracturing of a rapakivi granite block is studied in three dimensions. Five vertical, 200 m deep boreholes (ø = 66mm) were drilled for this purpose.

The selection of the geophysical measurements utilized for the fracture classification was based on the results of the previous geophysical investigations in the test holes.

The connections between the boreholes are evaluated from dipmeter data, crossholeseismic data and from charged potential cross-correlation data. The hydraulic conductivities of fracture zones and rock-blocks between them and the fracture apertures are calculated from water-injection test data.

Original languageEnglish
Pages (from-to)45-68
JournalEngineering Geology
Volume25
Issue number1
DOIs
Publication statusPublished - 1988
MoE publication typeA1 Journal article-refereed

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