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A test programme using the double embedment method has been established as the best way of investigating the comparative performance of long tendons to determine axial and shear properties. In this report a variety of long hole tendon reinforcement systems have been evaluated, together with several cable bolting grouts. Optimization of grout performance has been achieved, and a field quality control procedure has been developed.

Field work at varied sites in terms of conditions and geotechnical situations has been fundamental in optimizing system design and performance. A number of case studies are presented to illustrate the variation in the application and extent of different cable bolting options. Experience with cable bolt installations at many sites within British Coal has enabled key design factors to be identified and the establishment of quality assurance techniques. This has resulted in the production of a code of practice for cable bolt installations. It encompasses design, installation practices, training, monitoring and quality assurance. Development of rock bolt reinforcement is incorporated within the objectives of this project. Work was concentrated on developing and modifying the 'AT' bolt for various applications, as well as widening the scope of resin encapsulation. .

Additional information

Authors: BRITISH COAL CORPORATION, British Coal Corporation, Cheltenham (GB)
Bibliographic Reference: EUR 17188 EN (1997) 248pp., FS, ECU 41.50
Availability: Available from the (2)
ISBN: ISBN 92-827-9395-8
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