Method of and apparatus for breaking rock

Method of and apparatus for controlling advance of underground a

Method of and apparatus for disaggregating particulate matter

Method of and apparatus for extracting oil from oil shale

Method of and apparatus for forming and transporting mud clogs

Method of and apparatus for melting block sulphur

Method of and apparatus for steering a mining machine

Method of and apparatus for the mining of coal

Method of and arrangement for loosening, loading and transportin

Method of attenuating airblast from detonating explosive in an i

Method of blasting pillars with vertical blastholes

Method of blasting rock caverns with large cross-sectional area

Method of borehole hydraulicking of soluble minerals

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

Method of breaking a hard compact material, means for carrying o

Method of breaking free-standing rock boulders

Method of breaking up objects

Method of bulking an in situ oil shale retort substantially full

Method of circle mining of ore

Method of controlling the working motion of a cutting tool of a