Abstract: A rock bolt comprises a bolt rod secured in a borehole, a retaining plate attached outside the borehole, a bolt head for the retaining plate, and a supporting connection between the bolt rod and the retaining plate. The supporting connection comprises a tubular member adapted to be inserted into the bore hole, the tubular member having an outer end and an inner end, the outer tubular member end bearing on the retaining plate, and a compressively loaded, deformable and upsettable sleeve member accommodated with a clearance in the tubular member and held between a rodside thrust face and a plateside thrust face constituted by a collar adjacent the inner tubular member end.