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- Kvartsberg, Sara,1986Chalmers tekniska högskola,Chalmers University of Technology (author)
Hydrogeological characterisation and stochastic modelling of a hydraulically conductive fracture system affected by grouting: a case study of horizontal circular drifts
- Article/chapterEnglish2013
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- Elsevier BV,2013
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- LIBRIS-ID:oai:research.chalmers.se:63e77573-4d3a-4b26-96d6-795829cc913a
- https://research.chalmers.se/publication/177215URI
- https://doi.org/10.1016/j.tust.2013.05.007DOI
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- Language:English
- Summary in:English
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- Knowledge of the flow characteristics of the hydraulically conductive fracture system is important when planning grouting measures for underground openings, although investigations and data analyses may, for different reasons, provide uncertain information. The primary focus of this paper is to establish a conceptual description of the flow properties of a hydraulically conductive fracture system and to use it to evaluate the suitability of hydrogeological investigation methods and grouting designs proposed for a horizontal repository design (KBS-3H). Data from the KBS-3H experimental site, located at the Äspö Hard Rock Laboratory in Sweden, were gathered and analysed to characterise the hydraulically conductive fracture system and to produce a stochastic model for predicting fracture transmissivity distributions. The rock mass at the site was affected by pre-grouting activities. It was, however, still possible to recognise two categories of inflow features: the main hydraulic conductors, which could be identified reasonably using short-duration borehole tests, and the less conductive part of the fracture system (host rock) where the flow configuration could not be captured by the conducted borehole tests. Characterising the flow properties of both categories is deemed important when developing efficient grouting designs. Consequently, careful consideration must be given during the design phase to the choice of data acquisition method and its implication for characterisation and modelling. The collection of suitable, strategic data is identified as a prerequisite for the reliable prediction of the flow properties of a fracture system.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Civil Engineering hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng
- Effects of grouting
- Transmissivity distribution
- Fractured rock
- Stochastic modelling
- Hydraulic testing
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- Fransson, Åsa,1971Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)frans (author)
- Chalmers tekniska högskola (creator_code:org_t)
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- In:Tunnelling and Underground Space Technology: Elsevier BV38:0, s. 38-490886-7798
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