ANORDNING FOR HALDRIVNING AV HARDA BERG

摘要

APPARATUS FOR DRIFTING OPENINGS IN HARD ROCK An apparatus for drifting openings in hard rock incorporating a carrier capable of travelling along the floor of the opening. A means of breaking of the percussive type is mounted on the carrier by means of a turnable jib with provision for turning about said jib in both the horizontal and vertical planes. There is also incorporated a means of loading with a mucking conveyor. Employed as the means of breaking with a percussion tool directly acting upon the rock so as to break same when the means of breaking is set into a given position. Also provided are means of shock-absorbing which serve to link up movably said means of breaking with said jib in order to absorb the undesirable deflections of the means of breaking when the percussion tool recoils from the rock at right angler to the longitudinal axis thereof and to return the means of breaking into the given position.