135789 ⎘
Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam Slitting by cutter cables or cutter chains or by tools drawn along the working face by cables or the like, in each case guided parallel to the face, e.g. by a conveyor, by a guide parallel to a conveyor
Wire saw excavation apparatus capable of changing cutting line in accordance with cutting section and tunnel excavation method using same
#2Mining pin retention system
#3Mining pin retention system
#4EXCAVATING DEPOSITS FROM AN UNDERGROUND FORMATION LAYER
#5Method for wire saw excavation
#6Method for wire saw excavation
#7Method for controlling longwall operations using boundary layer recognition