Applied Physics and Mathematics Annotation << Back EXPERIMENTAL STUDIES OF PHYSICAL PROCESSES OF ORE CRUSHING BY DECONCENTRATED CHARGES UNDER CLAMPING CONDITIONS YU.P. GALCHENKO The paper briefly summarizes the theory and practice of industrial application of large-scale rebounding by converging charges formed on the basis of dividing the whole charge into its closely located parts in the conditions of development of vein-type ore deposits. A physical model of the explosion process of deconcentrated converging borehole charges has been developed, according to which, as a result of the interaction of stress waves of converging charges, the resulting blast wave front is formed with the concentration or attenuation of stresses in specified directions. The geometry of the resulting wave field is calculated by mathematical modeling for typical beam charge schemes. Based on this, the fundamental possibility of redistributing the same charge explosion energy of the beam geometry of deconcentrated charges is shown. The features of controlling the explosion of deconcentrated borehole charges under clamping conditions have been experimentally studied and the possibilities of implementing specific explosion requirements within various mining technologies by varying schemes of deconcentrated charges and conditions for the formation of blast waves of appropriate shapes, intensity and orientation have been considered. Keywords: vein deposits; power of ore bodies; conditions of breaking; deconcentrated charges; form of charge; laboratory experiments; field experiments; cumulation effect; efficiency of breaking; quality of crushing. DOI: 10.25791/pfim.05.2021.1207 Pp. 08-22.