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- Bjarnason, B., et al.
(författare)
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New developments in hydrofracturing stress measurements at Luleå University of Technology
- 1989
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Ingår i: International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. - : Elsevier BV. - 0148-9062 .- 1879-2073. ; 26:6, s. 579-586
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Tidskriftsartikel (refereegranskat)abstract
- Instrument and theoretical developments in hydrofracturing stress measurements at Lulea University of Technology since the first workshop in Monterey in 1981 are described and the general experience with the method in Sweden is summarized. A new field unit is described which includes a 1000-m long multihose and a 100 MPa water pump. Stress measurements by means of injection tests on preexisting fractures have been introduced and applied at two sites in Sweden. A theory has been developed which permits estimation of the maximum and minimum horizontal stresses in cases where transverse hydrofractures are created in the borehole wall instead of axial.
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| 2. |
- Stephansson, Ove
(författare)
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Rock mechanics in Sweden
- 1989
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Ingår i: International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. - : Elsevier BV. - 0148-9062 .- 1879-2073. ; 26:1, s. 1-11
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Tidskriftsartikel (refereegranskat)abstract
- This paper reviews rock mechanics research activities in Sweden. A short history of the development of rock mechanics in the mining, underground construction and mining equipment industries is presented. Teaching at Swedish technical universities and activity in research organizations and in the Swedish National Group of the ISRM are outlined. For the next 5-10 yr, most of the applied rock mechanics research will be conducted in the fields of mining and the final disposal of radioactive waste. New fields in the application of rock mechanics are being developed, for example, gas storage in excavations of hard rocks. Tunnel boring in hard rocks, holography for rock monitoring during blasting, physical and numerical modelling of grouting and some new trends in rock stress measurements are presented as examples of present research work within the major research organizations and university departments in Sweden.
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