Conference Presentations by Yorky Edgard Castillo
Curso de Modelamiento Geomecánico de Rocas
Curso de Modelamiento Geomecánica de Rocas
curso de Modelamiento Geomecanica de Rocas
Curso de Modelamiento Geomecanica de Rocas
Curso de modelamiento Geomecanica de Rocas
Diseño de caserones en Vulcan
Papers by Yorky Edgard Castillo
OPTIMISATION OF SLOPE ANGLES AT MINE ROSARIO-COLLAHUASI, 2006
The optimisation of slope angles, that is to say, increasing them, compared to the original desig... more The optimisation of slope angles, that is to say, increasing them, compared to the original design is always the subject of analysis of stability for geotechnical engineers and economic analysis for planning engineers. Questions to be answered include: • What is the acceptable risk? • What factor of safety? • What probability of failure or reliability? The Rosario Open Pit has a history of failure, poor quality rocks and high pore pressures. It was decided to deepen the pit below the programmed design to test the practicality of different design approaches, which if successful, could be used to improve the economics of mining at Collahuasi. The revised slope design has factors of safety in the range of 1.0 to 1.2, probabilities of failure of ten to 38 per cent, and increased slope angles of between 3° and 5° with respect to the original design. The pit deepening with these design slopes will deliver an extra two million tonnes of ore which will have a significant positive impact on mining economics. ROSARIO MINE-COLLAHUASI LOCATION The Rosario mine is located within the Collahuasi District, approximately 180 km south east of the city of Iquique in the Mountain I region of Chile, at an elevation of between 4300-4800 m.s.n.m. The Rosario deposit is principally primary sulfides, with a poorly developed secondary enrichment horizon that deepens between 50-250 m, strongly controlled by faults (Munchmeyer, 1984) (Figure 1). The orebody extends 2 km NW-SE and 1.5 km NE-SW and is continuous to a depth of more than 600 m below the sulfide interface.
Numerical models are computer programs that attempt to represent the mechanical response of a roc... more Numerical models are computer programs that attempt to represent the mechanical response of a rock mass subjected to a set of initial conditions (e.g., in-situ stresses, water levels), boundary conditions and induced changes (e.g., slope excavation). The result of a numerical model simulation is typically either equilibrium or collapse. If an equilibrium result is obtained, the resultant stresses and displacements at any point in the rock mass can be compared with measured values. If a collapse result is obtained, the predicted mode of failure is demonstrated.
Uploads
Conference Presentations by Yorky Edgard Castillo
Papers by Yorky Edgard Castillo