This work gives an account of a diagnosis and proposal of improvement of the current standards of blasting in CR-SE1, NV-2670 of section 2.50m * 2.70m of CIA Poderosa SA, ECM Marose SAC. The central theme is the reduction of the perforation diameter and the use of micro retardation fanels and how these influence the blasting results. The methodology applied for this evaluation was: the first, with respect to the analysis of the initial state of blasting with the current design, where the results were quantified as fragmentation, direct costs and behavior of the vibrations through the rock mass and its effect on the contour, and the second related to the proposal and implementation of improvements to the initial design, such as the reduction of the diameter of perforation, decrease of the length of load, use of load of low power in all the bores of contour and use of Faneles of the MS ser...