Life protector enclosure for mines

Method and apparatus for breaking a hard compact material such a

Method and apparatus for cutting reinforced concrete

Method and machine for digging ditch

Method for blocking gas flow in a coal seam

Method for closing off a mine gallery especially for use to prev

Method for controlling stress and increasing the strength of sup

Method of excavation and apparatus therefor

Method of fracturing rock or similar material and apparatus ther

Method of mine backfilling and material therefor

Method of securing objects in passages and arrangement obtained

Mine roof support

Mine roof support and method in longwall mining of thick mineral

Mining apparatus

Mobile adjustable curtain apparatus for use in room and pillar c

Omnidirectional drilling system

Parachute stopping for mine ventilation use

Prestressed roof support system

Process for preparing the exposed surface of a rock formation to

Shaft excavation method