Non-circular profile tunnelling machine with controlled...

Non-metallic reinforcing rod and method of use in supporting...

Non-return valve

Nut plate integral epoxy filled sleeve

Omnidirectional drilling system

Ore pass inspection system

Packaging arrangements for rock stabilizer sets

Panneau modulaire pour erection de murs

Parallel girder, in particular, for mine and tunnel supports

Pass-through lining and support structure and method for...

Pervious tunnel liner member

Pharmaceutical compositions containing organosilicon compounds

Pit prop with integrated pressure-relief valve and nailed pipes

Pivotable roof bolter for mining machine

Pivotal roof bolter and extendable rotatable protective...

Plant for digging and shoring up the walls of tunnels during...

Plate for use in support of a mine roof

Plug member

Point anchor coated mine roof bolt

Powder-actuated mechanical lock concrete anchor