Method of rock bolting and tube-formed expansion bolt

Details Method of rock bolting and tube-formed expansion bolt Method of rock bolting and tube-formed expansion bolt

E - Fixed Constructions

21

D

61/46

E21D 20/00 (2006.01) E02D 5/80 (2006.01) E21D 21/00 (2006.01) F16L 58/08 (2006.01)

Patent

CA 1233037

Abstract: A tube-formed rock bolt is partly circular in its cross-section and opposite its circular portion (12) it has a deep depression (16-18). Its ends are sealed and its outer end has a hole (44, 45) or a fit- ting (24) through which the bolt can be supplied with high pressure water that expands the tube to anchor it in the borehole.

524271

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