Design and construction of field-scale lysimeters for the evaluation of cover systems at the Antamina Mine, Peru

Cover systems have been included as a closure and long-term planning strategy for the estimated 1,539 Mt of waste rock at the Antamina Mine (Peru). A research program was initiated by Antamina, Teck, and the University of British Columbia to determine the most suitable type of cover system for the waste rock dumps at Antamina. The climate regime at the mine site presents special challenges given its high elevation with high rainfall during summer periods, followed by low to negligible precipitation during winter months. The covers were constructed of native, low permeability materials and topsoil, with the aim to reduce net infiltration and oxygen entry to underlying waste rock. Runoff and infiltration through the covers systems is captured in 15 m x 15 m x 2.5 m lysimeters and directed to a water conveyance system to 10 tipping buckets that continuously monitor flow rate. Ten thermal conductivity sensors were installed to measure matric suction and weather instrumentation was installed to obtain site-specific precipitation and net radiation data. This paper presents a summary of the design, construction, and early flow observations for the four cover systems under evaluation.[All papers were considered for technical and language appropriateness by the organizing committee.]Non UBCUnreviewedOthe

Compendio estadístico 2017

La Dirección Regional Sectorial de Educación Tacna, a través de la Dirección de Gestión Institucional, pone a consideración de los usuarios y demás lectores el presente instrumento de gestión, relativo al COMPENDIO ESTADÍSTICO DRSET - 2017, elaborado por la Unidad de Estadística Educativa en base a la información reportada de las Instituciones Educativas y Programas de Educación Inicial. Es preciso indicar que la estadística reflejada en dicho instrumento,Censo Educativo ha utilizado los sistemas SIGIED (Sistema de Gestión de Información Educativa) y online de DRSET - UGEL; ilustrándose variables educativas por Niveles y Modalidades de Gestión Pública y Privada, a fin de que el lector o usuario pueda interpretar fácilmente los indicadores estadísticos, que permita formular trabajos y proyectos de investigación en el campo educativo, donde se 0aprecia un Resumen Ejecutivo, por UGEL Metas de Atención, Ocupación, Secciones, Auxiliares de Educación, Personal Administrativo, Matrícula por Género y grados de estudio

A study of the mineralogical, hydrological and biogeochemical controls on drainage from waste rock at the Antamina Mine, Peru : an overview

A multi-scale study of solute release, transport, and attenuation mechanisms in waste rock under neutral drainage conditions is underway at the open-pit Cu-Zn-Mo Antamina mine in the Peruvian Andes. The objectives of the project are to better understand the mechanisms that control the fate of elements of concern, principally Zn, Mo, Cu, and As, and to develop field- and laboratory-derived scale-up relationships that provide a framework for prediction of waste-rock drainage quality at field scales and over long times. Five 36 m x 36 m x 11 m high instrumented experimental waste-rock piles have been constructed on site to provide insight into the hydrological and geochemical behavior of distinct combinations of waste rock under field conditions. Field cells constructed from 60 L barrels provide data on leaching behavior of the distinct rock types. Our results allow us to constrain the water balance, demonstrate that mixing of distinct waste-rock types may enhance attenuation of Zn and Mo in drainage and suggest that sulfide mineral oxidation may become O₂-limited in fine-grained reactive material.[All papers were considered for technical and language appropriateness by the organizing committee.]Non UBCUnreviewedOthe