Build-in-resin prestressed self-drilling hollow bolt is ONTON’s new developed and patented product at the end of 2023, which is the improvement on the basis of traditional self-drilling anchor bar. It consists of more than 10 devices, in addition to the traditional self drilling anchor bar, nut and plate, but also added resin capsule, stop plug, washer and so on. It can achieve two steps installation with much shorter time than that of traditional self-drilling anchor bar.

Build-in-resin prestressed self drilling hollow bolt has been widely applied in tunneling and will be gradually extended to mining, slope stabilization, etc. It is especially suitable for anchoring the vault that is prone to collapse. It has the following advantages:

1.Embedded resin capsules with tapered resin outlet anchor head:

Solve the problems such as resin capsules falling down from vault construction and difficulty in resin capsules propulsion in slightly collapsed holes, ensuring that the resin capsules are pushed to the bottom of the hole accurately, reliably and completely.

2.Two-step process:

Built-in blade to thicken the anchor rod body:

Reduce the process of resin capsules into the anchor hole, suitable for all types of construction machinery and operation methods, which can realize the mechanization of the whole process of bolt construction and can significantly improve the work efficiency. A single bolt construction time is no more than 4.5 minutes.

3.Built-in blade to thicken the anchor rod body:

Reduce the process of resin capsules into the anchor hole, suitable for all types of construction machinery and operation methods, which can realize the mechanization of the whole process of bolt construction and can significantly improve the work efficiency. A single bolt construction time is no more than 4.5 minutes. The resin is squeezed into the bottom of the anchor hole, and the capsule package remains in the rod, so the influence of capsule package on the anchoring performance is excluded. The optimized three paths matching is to improve the anchoring quality and to make the anchoring force reach more than 100kN.