PCT No. PCT/AU95/00554 Sec. 371 Date Feb. 18, 1997 Sec. 102(e) Date Feb. 18, 1997 PCT Filed Aug. 30, 1995 PCT Pub. No. WO96/07015 PCT Pub. Date Mar. 7, 1996The invention relates to a rock bolt (1) and method of installing a rock bolt, particularly a hollow bolt. The method of installation utilises a chemical anchor, the components of which are provided in a cartridge (4) which is either injected through the bolt or removably attached to an end thereof. The bolt preferably includes a thread (40) formed by plastically deforming the walls (41) of the bolt so as to maximise tensile strength whilst minimising wall thickness.
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