Community Research and Development Information Service - CORDIS

Abstract

Aim of the research is the determination of eventual cataclastic effects in environmental rock salt of a heated part of a vertical deep test bore hole, a model for HLW disposal. For environmental measurements at a distance, the acoustic microseismic method is suitable, and appropriate equipment (cross hole measurements) is designed, constructed, tested (laboratory and underground). Acoustic velocity data form a crucial point. A microseismic acoustic P-wave model, adapted to the process of structural changes, is developed. An underground cross hole measurement in the wall of a gallery with semi- circular section is treated and analyzed. A conclusion was that the mechanism involved in the process of gallery convergence was a combination of crystal plasticity and microcataclasis. The same mechanism might be expected to be present in the environmental rock salt of the HLW disposal deep bore hole. As a result this environmental rock salt might be expected to be impermeable. A plan for the application of the developed equipment during the heating test on the ECN- deep bore hole is shown. A theory on "disking' or "rim cracks' is presented in an annex.

Additional information

Authors: GRAMBERG J, TECHNICAL UNIVERSITY, DELFT (THE NETHERLANDS);ROEST J P A TECHNICAL UNIVERSITY, DELFT (THE NETHERLANDS), TECHNICAL UNIVERSITY, DELFT (THE NETHERLANDS)
Bibliographic Reference: EUR 9258 EN (1984) FS, 68 P., BFR 250, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123066900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top