Method for excavating a tunnel rock face by drilling a...

Method for excavating a working face by blasting

Method for explosive breaking of hard compact material

Method for forming an in situ oil shale retort

Method for producing chambered blast holes

Method for reclaiming highwalls at mining sites with partially m

Method for removing hard rock and concrete by the combination us

Method of and a device for carrying out wire bolting

Method of and apparatus for breaking rock

Method of and apparatus for breaking rock

Method of blasting rock caverns with large cross-sectional area

Method of breaking a full face of rock for constructing shafts a

Method of breaking free-standing rock boulders

Method of breaking up objects

Method of excavating rock caverns by blasting

Method of removing a minable product from an underground seam an

Method of underground working of ore deposits and handling ore

Mining system

Non-explosive drill hole pressurization method and apparatus for

Quarry operation