Community Research and Development Information Service - CORDIS


In the framework of the CEC programme on radioactive waste disposal (1985-1990), in situ experiments in the Asse II salt mine in Germany were conducted. This report describes the work of the 600 m borehole project performed during the contractual period August 1986 - December 1990. During this period devices for measurement of mechanical rock parameters were developed and made operational. For the drilling of the boreholes a new technique was developed. One main subject of investigation was to develop an on-line method to determine the gas content in the flushing air during drilling operation. The method used worked satisfactorily and the test showed that this surveillance method could be used during dry-drilling of deep emplacement boreholes in a future repository.

Additional information

Authors: HAMILTON L F M, ECN, Petten (NL);PRIJ J, ECN, Petten (NL);JOCKWER N, GSF/IFT, Braunschweig (DE)
Bibliographic Reference: EUR 14235 EN (1993) 114 pp., FS, ECU 12
Availability: (2)
ISBN: ISBN 92-826-4939-3
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