An apparatus for forming an underground tunnel
An elongate element tensioning member
An elongate element tensioning member
An elongate element tensioning member
An improved apparatus for ground support
An improved friction washer
An injection, sealing, valving and passageway system
Anchor
Anchor
Anchor
Anchor assembly for a mine roof bolt
Anchor bolt
Anchor bolt
Anchor bolt assembly
Anchor bolt assembly
Anchor bolt assembly
Anchor bolt for stabilising rock strata
Anchor device
Anchor device for securing rock bolts
Anchor device for use with a hollow bolt rod