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Abstract

In the year 1985 a heater test with a mean heat load of 50 kW was carried out in the Asse salt mine for 78 days. Its main aims were + to investigate possible fracturing of the rock + investigations on the transport of brine and gases + comparison of the measured mechanical stresses and temperatures, as compared to those determined by numerical methods. The evaluation of the measurement results was impeded by premature failure of some of the heaters, which proved to be a handicap to the symmetry of the experiment. It was possible, nevertheless, to find a good agreement between the measured and the numerically calculated temperatures. The mechanical stress measurements showed, as compared to the 2D-FE calculations, that the measured stresses lay within the expected range. Fracturing was detected by means of seismic observations, especially after termination of the heating. Brine transport was ascertained using geoelectric four point and self-potential measurements. The staining test showed no sharp fracturing of the rock salt, but a loosened-up zone at the grain boundaries impregnated with staining oil.

Additional information

Authors: FEDDERSEN H, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);FLACH D, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);FLENTGE I, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);FROHN C, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);GIES H, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);GOMMLICH G, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);HAHN J, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);HENTE B, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY);JOCKWER N GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY), GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG MBH MUENCHEN (GERMANY)
Bibliographic Reference: EUR 10827 EN (1986) MF, VOL. I, 278 P., BFR 450, BLOW-UP COPY BFR 1400, EUROFFICE, LUXEMBOURG, POB 1003 AND VOL. II, 251 P., BFR 450, BLOW-UP COPY, BFR 1250, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989125045700 / Last updated on: 1987-07-01
Category: PUBLICATION
Available languages: en