MINERÍA la mejor puerta de acceso al sector minero EDICIÓN 576 / SEPTIEMBRE 2025 104 Factor C: características relacionadas a la competencia de roca colgante, espaciamiento y tipo de relleno de fracturas. Factor D: características relacionadas a la competencia de roca piso, espaciamiento y tipo de relleno de fracturas. En la Tabla 2 se muestra el ranking de los métodos de minado para la zona Melisa 3 y Doña María Piso 6. Este análisis mediante la metodología de Nicholas (1981) arroja que el minado Sublevel Caving es el más factible de realizar, debido a las características geométricas, geomecánicas y de costos. Pero para implementar el método se debe diseñar, planificar y evaluar su estabilidad con mayor detalle, pasando previamente por la implementación de un tajo piloto. Tajo piloto Con el objetivo de evaluar la idoneidad del uso del Factor D: Characteristics related to the competence of the foot wall rock, fracture spacing, and type of fracture infill. Table 2 shows the ranking of mining methods for the Melisa 3 and Doña María Piso 6 zone. This analysis, based on Nicholas’ (1981) methodology, shows that the Sublevel Caving mining method is the most feasible to implement due to its geometric, geomechanical, and cost-related characteristics. However, in order to implement the method, it must first be designed, planned, and its stability evaluated in greater detail, prior to the implementation of a Pilot Stope. Pilot Stope With the objective of evaluating the suitability of the mining method, Catalina Huanca carried out a Pilot Stope in Mariela 4. This stope was mined, and it was recorded that the open area, with a hydraulic radius of 6 m, was sufficient to generate caving, which is consistent with the behavior reflected in the numerical modeling, as shown in Figure 3. The operation conducted strict control of drilling, blasting, and ore extraction to monitor stability and the propagation of the caving, avoiding possible airblast risks. Figure 4 shows part of the operational control carried out for the proper extraction of the Pilot Stope. Definition of Sublevel Caving Mine Design The definition of the mine design is based on a benchmark carried out in SLC operations similar to Catalina Huanca and on an analysis of ore flow in SLC. To define the mine design, the following aspects are established: Figura 3. Modelamiento numérico del tajo piloto. Figure 3. Numerical modeling of the Pilot Stope. Figura 4. Izquierda: control de parámetros de perforación. Derecha: registro de condiciones encontradas durante la perforación de los taladros. Figure 4. Left: Drilling parameter control. Right: Record of conditions encountered during drillhole drilling.
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