Konoval V. The development of the methods used to increase efficiency of the blast mining mass preparation for its rational using

The laws of destruction of mining breeds by explosion energy in a zone of explosives nearest from a site of a charge and technique of account of this zone parameters are represented. The parameters of explosive crushing of mining breeds around chink of a charge are investigated and the factors of their change are determined in view of expenses of energy on deformation of volume of breeds and for-mation of a new surface at destruction of given volume. The prod-ucts of explosive crushing of granites that can be used as fillers of building solutions and concrete have been established by an ex-perimental way. It has been calculated that the number of destroyed products within the explosion zone ranges from 2,5 to 7,4% and depends on the characteristic features of hardness and the explosive type. At experimental researches in industrial conditions the high efficiency of the combined charges from industrial explosives and conversion materials on parameters of improvement of breaking and reduction of emissions in air of harmful gases and dust is proved.