No abstract

In this paper are studied themechanism of matrix damage in rock cutting diamond toolswhen interacting with rock. Earlier, in the sludge obtained during mining with a diamond tool on a block of sandstone of the Torez deposit, using a scanning electron microscope (SEM) ZEISS EVO 50 XVP, equipped with Oxford Instruments` Ultim Max 100 energy-dispersive X-ray analyzer (elemental analysis) particles were found whose chemical composition corresponded to the matrix material of the tool. According to the theory of M.V. Kirpichev, the complete correspondence of all configuration elements of the individual studied matrix particles and rock particles, which the sludge obtained as a result of work of diamond tool testifies to a single mechanism of brittle fracture of both counterbodies during dynamic interaction. However, the nature of the matrix material indentation, remains, unexplored. On the basis of the hypothesis that the damage to the matrix material of a diamond tool is carried out by roughness elements from the side of the rock, the goal was set to investigate the wear products of a diamond-free insert made from material, used as a matrix in a diamond rock-breaking tool with a short-term dynamic contact with cooling with a rock block However, the nature of the matrix material indentation, remains, unexplored. The originality of the method lies in the fact that in this study, the destructive indenters are not diamond grains, which gouge out particles of the rock, but elements of the roughness of the rock, which damage theexperimental cylindrical free-diamond element from NiSn (6%), having a density of 7.875 g/cm3, performed by the method of intensive sintering. The sludge obtained as a result of a short-term interaction of the experimental element and the rotating block of the rock on the bench was examined using a , using aabove-mentioned scanning electron microscope. The spectral analysis of the removed from the sludge particle of matrix material from which the experimental diamond-free element was made, confirmed the conformity of chemical composition of particle to the chemical composition of the matrix material of the experimental diamond-free sample.Full correspondence of all configurational components of a NiSn particle (6%) obtained by the action of a rock roughness element on a diamond-free insert during their dynamic interaction with all configurational components of wear particles of a diamond tool matrix., according to the similarity theory of M.V. Kirpichev, confirms the above-mentioned hypothesis.