GFRP tube with integrated packer function for high pressure injection of weathered rock mass.
The high torque hollow bar is fitted with an expansion packer and integrated non return valve. Two additional valves are fitted to both ends of the tube, the top valve to open when the packer is inflated, the bottom valve to prevent backflow after injection.
The GFRP system allows cutting during heading or mining of ore. Rapid heading will not be delayed. Light weight makes handling easy, even in confined underground conditions.
|Outer Diameter (mm)||25|
|Inner Diameter (mm)||8|
|Cross Sectional Area (mm²)||350|
|Breaking Thread Load- Steel Nut||180|
|Beaking Thread Load- FRP Nut||70|
|Bending E-Modulus (Gpa)||40|
|Inner Pressure (MPa)||240|
|Strain At Failure (%)||2.1|