Por: Ing. Luisa Angélica Pérez Cárdenas, Incimmet e Ing. Carlos Perea Solano, docente en la Universidad Pedagógica y Tecnológica de Colombia. AbstractThe sub-level mining method is one of the most commonly used in medium and large scale mining operations, as is the case of zinc mining in Peru. This method requires, in order to follow the sequence of exploitation, the filling of empty stopes, such as paste fill, which is produced by mixing the tailings from the ore concentration plant with 3.5% cement, so that this filling acts as a large pillar that provides the necessary support for the mine (0.8 MPa). However, this creates a dilution with the mineral to be exploited when advancing to the surrounding pits.Due to this and the need to automate the mining operation, it was decided to evaluate the cemented detrital filling, through resistance analysis, feasibility studies, cost performance, productivity increase and operation safety. As a result, maximum resistance values of the pillars of 1.6 MPa are obtained, avoiding dilution and improving the percentage of mineral recovery.