Method for setting parameters for blasting using bar-like charge

摘要

The present invention provides a method for setting parameters required for any type of blasting operation using a bar-like charge system by devising equations based on which the maximum blasting efficiency may be achieved within a safe range to prevent flying rock accidents even when the line of least resistance W or filler length P is unknown. When defining a blast hole diameter, i.e., charge diameter as d, a charge hole length as M, a filler length as P, a charge length N=M-P, a fracture radius or interval length as D, and the specific gravity of charge as A, if the charge hole angle with respect to the first free surface G1, is &agr;≦90°, based on an equation for setting blasting coefficient c: ##EQU1## and by removing the filler length P therefrom, a fracture rock volume V may be determined as: ##EQU2## and a charge amount L may also be determined as: ##EQU3##