Way of doing blasting with a certain degree of fragmentation to blow up the rock mass

摘要

A method of conducting blasting operations with a certain degree of crushing of blasted rock mass comprising drilling blast holes in the region between them, the detonation of explosives characteristics physico-technical properties of the rock mass, the parameters of its fracture, their loading and firing, characterized in that the loading of blast holes produce BB at a specific flow in m3 blasted rock mass in an amount which is determined in consideration of explosive energy loss during the expansion of the charge explosion products in the well volume occupied charge, as well as the losses associated with the degree of completeness of a particular detonation of explosives in a borehole particular diameter, which are administered at the estimated expression rate of relative performance explosives used, the specific consumption of BB is determined from the expression: ! where Q - mass of the charge in a borehole kg; ! H - height of the ledge, m; ! - content in the array individually maximum size r 0.15; ! Vn.m. - the estimated minimum yield of oversize%; ! VH. - a predetermined output oversize%; ! G 0.15 m - maximum piece size within the crushing zone with radius R (the conditioned pieces of size); ! - efficiency factor BB applied towards another (reference) BB; ! - the average distance between the cracks in the array in meters; ! d - diameter borehole charges, m; ! Δ - the density of loading wells, kg dm3! - correction for the relative (in diameter) length of borehole charges; ! M - the serial number on the soil classification snip.