Depth of drilled hole:
Diameter of drilled holes:

3 210 mm
28÷64 mm

Depth of drilled hole:
Diameter of drilled holes:

2 900 / 1 900 mm
28÷64 mm

Depth of drilled hole:
Diameter of drilled holes:

2 000 mm
28÷64 mm

Length of bolts:
Diameter of drilled holes:

1,6 - 2,2 m
28÷38 mm

Length of bolts:
Diameter of drilled holes:

1,6 - 1,8 m
28÷38 mm

Length of bolts:
Diameter of drilled holes:

1,6 - 1,8 m
28÷38 mm

Two-boomDrilling of long holes up to 30m Installation of cable bolt supports

Length of bolts:
Diameter of drilled holes:

5,5 - 7,5 m
28÷64 mm