Grouting anchor rods are a new product developed based on the actual needs of China's tunnel engineering, slope treatment projects, and coal mine tunneling projects. The main products include: ordinary hollow grouting anchor rods; self-advancing hollow grouting anchor rods; expanding shell hollow grouting anchor rods; and combined hollow grouting anchor rods.

Grouting anchor rods feature a hollow design for the rod body, with the central hole serving as a high-pressure water and air passage as well as a grouting channel. Compared to solid rods, the hollow design offers enhanced stiffness and shear strength. The outer surface of the anchor rod body is fully lengthened with standard large pitch threads, which facilitate the cutting and extension of the anchor rods. Compared to smooth rods, this increases the bonding area between the rod body and the grouting material, thereby improving the anchoring force.