Drilling in hard rock
Quarries, mines and tunnelling all involve strict standards of economising. Whether it be preparation of blast holes or back anchoring.
Meeting high standards safely and economically
In contrast to foundation engineering, this situation requires drilling equipment that is adapted to special conditions. Hydraulic hammer drills, for example, are used with adapted impact frequencies and impact energies. Drilling into hard rock is performed based on the principle of rotary percussive drilling. Top hammers are used for this purpose. Air is the flushing medium usually used to flush drill cuttings from the borehole. A dust exhaust collects the drilling dust expelled. Drilling blast holes usually does not require an extension of the drill pipes of the kind seen in other drilling methods, because in this case the drill is only sunk to a defined depth that can be reached with the length of a single drill pipe.