Monitoreo de la humedad en depósitos de relave a partir de mediciones de reflexión de luz

Abstract

Monitoring of tailings water content using light reflection measurements

Estudio de la relación entre la reflexión de luz y el contenido de humedad superficial en muestras de relave utilizando imágenes hiperespectrales

“…Estudio de la relación entre la reflexión de luz y el contenido de humedad superficial en muestras de relave utilizando imágenes hiperespectrales. 31, 77-84 de la parábola el cual ha sido nombrado como humedad máxima (w m ), lo cual es consistente con lo presentado por Araya et al (2019).…”

“…Pese a lo anterior, el uso de imágenes hiperespectrales en el monitoreo de variables de interés en el manejo de depósitos de relaves es bastante acotada, encontrándose estudios asociados al monitoreo de humedad en relaves provenientes de la extracción de petróleo (Entezari et al, 2013), y más reciente en minería metálica (Araya et al, 2019), estudio llevado a cabo en laboratorio, el cual hace uso de imágenes multiespectrales para monitorear el proceso de disecación de probetas de relave de cobre, hallando una relación parabólica entre la humedad superficial y la reflexión de luz, la cual es aplicada en terreno en conjunto con el índice de vegetación de diferencia normalizada (NDVI) para estimar el contenido de humedad superficial, entregando buenos resultados.…”

Estimation of Moisture Content in Thickened Tailings Dams: Machine Learning Techniques Applied to Remote Sensing Images

“…In the context of extractive industries, [22] carried out a series of tests on oil sand tailings and found similar relationships between soil water content and light reflection as those found by [17] for soils. Furthermore, an investigation into soil w% using series of spectral images in laboratory and field conditions at light wavelengths in the solar domain (400 and 2,500nm) using a conventional Visible (VIS) camera and a Near-infrared (NIR) camera [5] [6] [7] found a high correlation between surface water content (w%) for tailings material and active illumination at 980nm, the advantages of which (lighting at a narrow spectral band) includes the ability to illuminate areas unreachable by ambient light (e.g., among the cracks generated by shrinking tailings).…”

“…At the experimental TTD site, prospecting points were located based on deposition age, dry sectors, fresh tailings and discharge at the time of the fieldwork campaign. Following the same methodology presented in article [5] [6] This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ This article has been accepted for publication in a future issue of this journal, but has not been fully edited.…”

“…The high risks of great environmental and economic losses resulting from catastrophic failures of tailings deposits [4] -not to mention the imperative for greater water recovery, decreased environmental impact, and improved physical stability -have encouraged the mining industry to seek other solutions. The trend has been toward thickened tailings dams (TTD) technology, with clear advantages and benefits as a high-solid disposal and material desaturation process [5] [6] [7].…”