Prestressing of mine props

Procede et appareillage de realisation du soutenement pour...

Process and apparatus for continuously lining a tunnel with...

Process and device for the exploitation of subterranean...

Process and device sealing barrier constructions in...

Process for communicating a water body with tunnels bored...

Process for consolidating and sealing coal and/or rock, soil...

Process for sinking of shafts

Process for the driving of a tunnel and tunnel borers therefore

Process for waterproofing surfaces

Process of grouting rockbolts in drill holes

Profile steel

Prop

Prop headboard

Prop preloading apparatus

Pumpable rockbolt method

Push-on gripper plate for use with rock bolts