rock peg, and method for making a rock peg.

摘要

The present invention relates to a rock bolt (1) to be embedded in a borehole (2) comprising an extended energy absorbing part (4), the first end (11) of the energy absorbing part (4). comprising an anchor (12) and the second end (15) of the energy absorbing portion (4) comprising a bolt joint (16) for prestressing the rock bolt (1). the rock bolt (1) comprises a tubular part (3) extended with a sleeve (7) and a first end section (5) and a second end section (6), with an inner dimension that is larger than the dimension of the energy absorbing part (4) and arranged such that it surrounds the energy absorbing part (4). The invention also relates to a method for manufacturing such a rock bolt.