Method of advancing a plurality of longitudinally arranged...

Method of anchoring elements and a device for carrying out...

Method of and a device for carrying out wire bolting

Method of and a device for guiding a wire in the wire...

Method of and apparatus for concrete tunnel lining

Method of and apparatus for installing reinforcing members...

Method of and apparatus for installing solder bolts in rock...

Method of and apparatus for loading boreholes

Method of and arrangement for setting anchors in loose rock...

Method of and means for anchoring bolts in concrete

Method of applying chemical anchoring adhesive

Method of blasting and reinforcing rock cavities

Method of constructing a shaft lining

Method of constructing underground gallery by using...

Method of directing drilling pattern in curved tunnels, rock...

Method of filling a borehole

Method of fixing anchor bolts in the drill holes

Method of forming spiral or helical tunnels and sections...

Method of lining tunnelling galleries and the like

Method of mining oil shales, tar sands and other minerals