TUBULAR PRESTRESSED INJECTED ROOF BOLT

The utility model discloses a pipe type pre-stressed grouted anchor rod, which relates to the mining and the construction. The utility model has good property and is used for the support of the underground construction and the reinforcement of the ground construction. The utility model is composed of a pipe body, an upper wedge, a lower wedge, a baffle ring and a disc-shaped liner plate, wherein, the inner wall of the head part of the pipe body is provided with the upper wedge and the lower wedge, and is also provided with two straight seams for the expansion of the head part and two radial holes for the circulation of mortar; the baffle ring is welded on the outer wall of the tail part of the pipe body. The pipe type pre-stressed grouted anchor rod can be used as a temporary support, and can also be used as a permanent support for the utility model is grouted. Thus, the problem that a common pre-stressed grouted anchor rod has the advantages of complicated structure and time-wasting installation is solved.