Mathematic simulation for the rock mass destruction by blasting

Abstract

Modeling of rock mass destruction by explosion allowed to obtain mathematical models of the formation of crushing zones, intensive grinding and crack formation, which are formed around the charging cavity in the rock mass with taking into account the diameter of the charging cavity and the diameter of the explosive charge, detonation compaction of rocks under the action of rock pressure. According to the obtained mathematical models, the radii of the crushing zones, intensive grinding and crack formation during blasting in the charging cavity of the cartridge emulsion explosive Ukrainit-P-SA and bulk emulsion explosive Ukrainit-PP-2 were calculated. This allowed us to establish that the diameter of the explosive charge significantly affects the pressure of the explosion products in the charging cavity. It is established that during the charge of bulk emulsion explosive Ukrainit-PP-2 is detonated, the radii of the destruction of the rock mass around the charging cavity are increased by 1.5 – 2.0 times in comparison with the cartridge emulsion explosive Ukrainit-P-SA.