El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / Presplitting is a controlled-blasting technique with applications in open-pit mines. The main purpose of this technique is to prevent and control overbreaks caused by excessive vibrations due to blasting. This technique is especially effective in controlling overbreaks because it provides a separation surface between the main blasting pattern and the walls of the final slopes. The drilling mesh and loading conditions in the drill are designed in this study by considering the uncontrollable variables of the rock mass as important factors. The proposed model for the presplitting optimization process helps to optimize controlled-blasting designs. The main idea of the proposal is to develop a model that includes the most relevant processes, as well as the most suitable parameters for an efficient design. Copyright 2019.

En la presente tesis se estudia la aplicación de la técnica de voladura de pre-corte en las galerías de desarrollo de la mina subterránea MARSA para reducir la sobrerotura en el macizo rocoso, para tal efecto se considerarán los aportes que brindan las disciplinas de geomecánica, geología, perforación y voladura. La investigación se llevó a cabo en la cordillera oriental de los Andes, al norte de Perú en la provincia de Pataz, donde se encuentra el Batolito de Pataz, yacimiento de tipo orogénico asociado a procesos de metamorfismo y caracterizado por vetas auríferas; específicamente en el área de influencia de las actividades de la Unidad Minera San Andrés. Con la voladura de pre-corte se obtendrá una mejor estabilidad en las labores de desarrollo dando como consecuencia la reducción de la sobrerotura en el macizo rocoso. Se realizaron estudios geomecánicos para designar el tipo de roca de la zona y de esta manera poder realizar una malla de perforación adecuada, así como la selección de los explosivos adecuados para asegurar no afectar el macizo rocoso. Del mismo modo, se realizó la comparación de los costos involucrados en el diseño de la voladura convencional en contraste con la voladura de pre-corte. De manera teórica y cuantitativa, se demuestra que mediante la aplicación de la voladura de pre-corte es posible reducir la sobrerotura en el macizo rocoso y mejorar la estabilidad física de las labores de desarrollo. / The present thesis studies the application of the pre-cut blasting technique in the development galleries of the MARSA subway mine to reduce the overburden in the rock mass, for this purpose the contributions provided by the disciplines of geomechanics, geology, drilling and blasting will be considered. The research was carried out in the eastern cordillera of the Andes, north of Peru in the province of Pataz, where the Batolito de Pataz is located, an orogenic type deposit associated with metamorphism processes and characterized by gold veins, specifically in the area of influence of the activities of the San Andres Mining Unit. With the pre-cutting blasting, a better stability in the development works will be obtained, giving as a consequence the reduction of the overburden in the rocky mass. Geomechanical studies were carried out to designate the type of rock in the area in order to be able to carry out an adequate drilling mesh, as well as the selection of the appropriate explosives to ensure that the rock mass is not affected. Likewise, the costs involved in the design of conventional blasting in contrast to pre-cutting blasting were compared. In a theoretical and quantitative way, it is demonstrated that through the application of pre-cutting blasting it is possible to reduce the overburden in the rock mass and to improve the physical stability of the development works. / Tesis