1. Universidad de Chile, Department of Mining Engineering, Tupper 2069, Santiago 8370451, Chile
2. Universidad de Chile, Department of Mining Engineering, Tupper 2069, Santiago 8370451, ChilebUniversidad de Chile, Advanced Mining Technology Center, Blanco Encalada 2002, Santiago 8370449, Chile
3. Universidad de Chile, Advanced Mining Technology Center, Blanco Encalada 2002, Santiago 8370449, ChilecUniversidad de Chile, Department of Civil Engineering, Blanco Encalada 2002, Santiago 8370449, Chile