The GE-bolt with 45° top cut is mainly used for resin installations, but can of course also be used in cement filled drill holes (if so make sure to keep bolt in position until necassary hardening of the cementitius grout have taken place).
GMA supplies resin bolt with different nuts and systems for spinning the bolt during installation (some nuts with installed shear-pin that snaps off when certein curing have occured before the spherical washer and dome plate is tightened, some with nuts where the nut is prevented to thread-off the rockbolt by a spot weld when the bolt is spun "backwards" compared with tightening direction of the nut). All depends on the customers installation equipment that we easily can adopt to.
This section gives an overveiw of the different bolt dimensions, concering possible nuts to fit your installation equipment do contact us.
Note: For information concerning needed numbers and dimensions of resin cartridges in the drill hole, contact your resin supplier who also can inform you about necassary mix of slow and fast curing resin cartridges as well as of needed mixing times and revolutions of the bolt. Do pay attention to needed spin times based on both bolt lenght as well as used rpm on the bolt during installation.
Dynamic bolt made of Ovako 280 material in dimension 20,3mm with an Yield strenght of min 460 N/mm2, Tensile strenght of Min 600 N/mm2 and a minimum elongation of 19%.
Produced in various lenghts from 1,8m up to 3m.
Material specification, Mechanical properties / Technical specification and Test report are enclosed as separate files.
Dynamic bolt made of Ovako 280 material in dimension 22mm with an Yield strenght of min 460 N/mm2, Tensile strenght of Min 600 N/mm2 and a minimum elongation of 19%.
Produced in various lenghts from 1,8m up to 3m.
Material specification enclosed as separate file.
Dynamic bolt made of Ovako 280 material in dimension 25mm with a yield strength of min 460 N/mm2, tensile strength of Min 580 N/mm2 and a minimum elongation of 19%.
Made in different lengths from 1.8m up to 3m.
Material specification is attached as a separate file.
