Promising experimental investigations related to the percussive cutting of hard rocks
A point-load testing rig of a special design enabling the generation of compressive force of up to 1.6 MN was used for the tests. The primary objective was to experimentally determine the force-penetration diagram for a point-attack cutting tool compressed into granodiorite samples. Obtained results will be used for defining tool-rock border conditions while determining parameters of a percussive cutting system on the basis of the theory of wave propagation in a one-dimensional medium. Calculation results will be then compared with percussive cutting tests conducted with the use of a percussive testing rig. This research is a part of the InnoCrush project and aimed at developing new technologies enabling economically sound mechanical excavation of hard rocks. The rock cutting group of the Institute of Mining and Special Civil Engineering expresses its deep gratitude to Prof. Lieberwirth, Dr. Hesse and Dipl.-Ing. Peukert for their kind support and contribution to the conducted research.