CALCULATION OF GAS-DYNAMIC PARAMETERS IN POWDER CHAMBER OF A BLAST HOLE

The problem in question is relevant since the process of detonation and shockwaves collision and recompression of detonation products is a challenging task in terms of gas dynamics. The paper is aimed at addressing this problem that would enable to intentionally control the process of transferring energy of explosive to environment through choosing optimal structure of charge or mode of triggering. The problem is examined mostly through method for numerical simulation of non-steady detonation and gas dynamic processes occurring while blast-hole charge is exploded. An attribute-based pattern of process for transferring energy of explosion products to environment when blasting charges of different structures and with different parameters of triggering modes was pre-investigated. The paper describes mathematical model of calculating parameters of dynamic loads on a blast-hole (hole) wall when exploding charges of various structures in various triggering modes. The results of calculating parameters of stress wave generated in rock mass by explosive charge blast and gas dynamic parameters in powder chamber of a blast-hole (well) were presented. The obtained coefficients of explosion pulse effect allow to correct calculations of unit rate of differently-structured charges.