公开(公告)号：US10907474B2

公开(公告)日：2021-02-02

申请号：US15768219

申请日：2017-06-07

Applicant: China University of Mining and Technology

Inventor： Nong Zhang ,  Zhengzheng Xie ,  Changliang Han

IPC: E21D20/00 ,  E21D21/00 ,  E21F17/18 ,  E21D20/02 ,  E21F17/00 ,  E21F17/02 ,  G01B11/30

Abstract: A reaming and self-rotating anchor rod includes a rod body, a drill bit, a connecting member, a tray, and a nut. One end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter. The rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass. The drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface.