On the bolt is arranged an energy accumulator (3) which supports at the front end of the bolt in the bore hole on the anchoring area formed by the mortuary mass. The bolt on its outer surface is provided on the length of the anchoring area (13) with a compound-preventing device (2). The energy accumulator (3) is formed as a ring body and is arranged between two steel discs (4). It is made of elastomer or aluminium foam. In it a spring is installed. The compound-preventing device is a rubber hose, or a coating medium comprising slide varnish, wax or epxoyacrylate resin. Where a varnish is used, this can be t-butylcatechol or phenol resin varnish.
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