Sandwich System

There are two types of Sandwich System with single yield tube and double yield tube.

The Sandwich system is used for buffering and releasing the pressure of the rocks to protect the bolts from damaging and breaking

It can increase the elongation of the bolts.Especially match with cable bolts to form a high tensile strength,high elongation and high anti-shearing capacity
support system.

This system is also matches with the Full threadbar bolt, Grooved bolt, Sharp end bolt, Slot&wedge bolt, etc.

Specifications

• Damping through the nut in the casting resin anchor while stirring, and then pre-stressed.
• Release device in a high pressure situation, so that yield tube can be deformed to pressure, buffer and release the pressure of surrounding rock to protect against damage to the anchor.