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Evaluation of measurement-related uncertainties in the analysis of overcoring rock stress data from Äspö HRL, Sweden: a case study
Luleå tekniska universitet.
2003 (English)In: International Journal of Rock Mechanics And Mining Sciences, ISSN 1365-1609, E-ISSN 1873-4545, Vol. 40, no 7-8, p. 1173-1187Article in journal (Refereed) Published
Abstract [en]

A re-evaluation of overcoring results from the Borre Probe and the CSIRO HI cell was carried out at the Äspö HRL. The re-analysis revealed a number of measurement-related uncertainties for the two cells, e.g. bonding, temperature effects and identification of elastic parameters. These uncertainties were corrected and the re-analyzed strains were then used to determine the in situ stress field using standard least-squares technique. The results indicate lower stress magnitudes compared to the original interpretations and the results are in good agreement with existing hydraulic fracturing data as well as with theoretical vertical stress. Overall, the re-analysis indicates that the stress field at Äspö HRL is well constrained and relatively consistent with depth.

Place, publisher, year, edition, pages
2003. Vol. 40, no 7-8, p. 1173-1187
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-2547DOI: 10.1016/S1365-1609(03)00114-XISI: 000186114600016Scopus ID: 2-s2.0-0142249827Local ID: 02bc8400-95e5-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-2547DiVA, id: diva2:975400
Note
Validerad; 2003; Bibliografisk uppgift: Special Issue of the IJRMMS: Rock Stress Estimation ISRM Suggested Methods and Associated Supporting Papers; 20061227 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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