公开(公告)号：US10858937B2

公开(公告)日：2020-12-08

申请号：US16634238

申请日：2017-09-14

申请人： EPIROC DRILLING TOOLS AB

发明人： Brendan Robert Crompton ,  Cornelius Adriaan Nieuwenhuis ,  James William Sheppard ,  Henri Visser

IPC分类号： E21D21/00 ,  E21D20/02

摘要： Disclosed is a grout anchored rock bolt which includes an elongate cylindrical body of a suitable material which has at least one integral anchor portion which includes of a plurality projection, each of which extends laterally from the body in at least one radial direction, wherein the projections are consecutively serially arranged along the length of the anchor portion and wherein each projection is radially offset relatively to the preceding formation at an angle that is not orthogonal.