Hollow grouting type thorn anchor rod

The utility model belongs to the technical field of roadway support, and particularly relates to a hollow grouting type thorn anchor rod. Comprising a sealing plug, a nut, a base plate, a stop-grouting plug, a grouting hole, a thorn block, a thorn anchor rod body, a drill hole and a rock mass. The thorn anchor rod body is divided into an anchoring section and an exposed section, grouting channels are arranged in the anchoring section and the exposed section, the thorn blocks are arranged on the outer surface of the anchoring section, a plurality of grouting holes communicated with the grouting channels are formed in the anchoring section in the radial direction, a stop-grouting plug is installed on the exposed section, the stop-grouting plug is connected with a base plate, and the base plate is connected with a nut. The X-shaped thorn block is arranged in the axial direction of the thorn anchor rod body, so that the X-shaped thorn block is in close contact with surrounding rock, the frictional resistance and