Browsing by Author "201-0301188"
Now showing items 41-60 of 140
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Fuenzalida Navarrete, José Ignacio (Universidad de Chile, 2014)El método empírico de diseño de excavaciones subterráneas de Mathews predice la estabilidad de un caserón en función de su tamaño y la competencia del macizo rocoso en un contexto minero. Una de las ventajas del método es ...
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Hosseini, S. A.; Asghari, O.; Emery, Xavier; Maleki, M. (OGS, Istituto Nazionale di Oceanografia e Geofisica Sperimentale, 2017)The Mehdiabad complex deposit is located 116 km SE of Yazd, in the structural zone of central Iran. At this deposit, important decisions are often based on the grades of multiple elements (zinc, lead, and silver). In ...
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Pizarro Pavez, Paulina Ignacia (Universidad de Chile, 2016)Soil gas sampling technique by means of passive collectors devices (OreHound®) was carried out over the Atlántida porphyry deposit, located in the Atacama Region of northern Chile. Atlántida is a porphyry Cu-Au-Mo deposit ...
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Adeli, Amir; Emery, Xavier; Dowd, Peter (MDPI AG, 2018)This paper proposes a geostatistical approach for geological modelling and for validating an interpreted geological model, by identifying the areas of an ore deposit with a high probability of being misinterpreted, based ...
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Geostatistical estimation of mineral resources with soft geological boundaries: a comparative study Ortiz Cabrera, Julián; Emery, Xavier (SOUTH AFRICAN INST MINING METALLURGY, 2006-08)Mineral resource evaluation requires defining geological domains that differentiate the types of mineralogy, alteration and lithology. Usual practice is to consider the domain boundaries as hard, i.e. data from across the ...
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Mery Guerrero, Nadia Macarena; Emery, Xavier; Cáceres Saavedra, Alejandro; Ribeiro, Diniz; Cunha, Evandro (Elsevier, 2017)This paper addresses the problem of quantifying the joint uncertainty in the grades of elements of interest (iron, silica, manganese, phosphorus and alumina), loss on ignition, granulometry and rock types in an iron ore ...
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Emery, Xavier; Ortiz Cabrera, Julián; Cáceres, A. M. (SOUTH AFRICAN INST MINING METALLURGY, 2008-05)Plurigaussian simulation allows constructing lithofacies or rock type models that reproduce the contacts between facies in accordance with the geologist's interpretation. its implementation requires inferring the local ...
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Pinheiro, Marisa; Vallejos Massa, Javier; Miranda, Tiago; Emery, Xavier (Elsevier, 2016)A better characterization of complex rock masses is essential in geotechnical engineering, as the empirical systems widely used for this purpose have significant limitations and do not provide adequate answers for risk ...
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Parra, Jorge; Emery, Xavier (ELSEVIER SCIENCE BV, 2013-05)Cross-well seismic reflection data, acquired from a carbonate aquifer at Port Mayaca test site near the eastern boundary of Lake Okeechobee in Martin County, Florida, are used to delineate flow units in the region intercepted ...
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Maleki, Mohammad; Emery, Xavier (Elsevier, 2020)Identification and categorization of geological, geotechnical, or geometallurgical domains is a common practice in the modeling of mineral deposits, in order to account for the controls exerted by categorical variables ...
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Letelier Maturana, Isabel Beatriz (Universidad de Chile, 2012)La definición de los recursos de un yacimiento constituye el primer eslabón de la cadena del negocio minero. Si éstos son definidos con una alta probabilidad de error, todos los procesos posteriores, entre ellos el diseño ...
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Rosales Fernández, David Alonso (Universidad de Chile, 2014)En el negocio minero es un asunto de vital importancia la evaluación de la rentabilidad esperada, que permita lograr un desempeño operacional óptimo con la menor incertidumbre posible. Actualmente, los modelos de estimación ...
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Emery, Xavier; González, Karina (2007)Geological modelling is a key step prior to grade estimation in a mineral deposit and consists of a deterministic partitioning of the deposit into sub-domains called 'geological units', each with relatively homogeneous ...
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Maleki, Mohammad; Emery, Xavier; Mery, Nadia (MDPI AG, 2017)Geostatistics offers a set of methods for modeling, predicting, or simulating geological domains in space. In addition of being an input of some of these methods, indicator direct and cross-variograms convey valuable ...
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Hekmatnejad, Amin; Crespin, Benoit; Opazo, Álvaro; Emery, Xavier; Hitschfeld-Kahler, Nancy; Elmo, Davide (Pergamon-Elsevier, 2020)The purpose of this work is to highlight the impact of input parameters uncertainty in discrete fracture network (DFN) models and their engineering applications. We show how the error of an input parameter, here the ...
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Arroyo, Daisy; Emery, Xavier (Springer, 2020)The conditional simulation of Gaussian random vectors is widely used in geostatistical applications to quantify uncertainty in regionalized phenomena that have been observed at finitely many sampling locations. Two iterative ...
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Maleki, Mohammad; Emery, Xavier (International Association for Mathematical Geosciences, 2015)This work deals with the joint simulation of copper grade (as a continuous regionalized variable) and rock type (as a categorical variable) in Lince–Estefanía deposit, located in northern Chile. The region under study ...
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Maleki, Mohammad; Emery, Xavier (Elsevier, 2017)In mineral resources evaluation, the joint simulation of a quantitative variable, such as a metal grade, and a categorical variable, such as a rock type, is challenging when one wants to reproduce spatial trends of the ...
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Maleki, Mohammad; Emery, Xavier (Elsevier, 2017)In mineral resources evaluation, the joint simulation of a quantitative variable, such as a metal grade, and a categorical variable, such as a rock type, is challenging when one wants to reproduce spatial trends of the ...
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Frez Ríos, Tamara (Universidad de Chile, 2014)En la actualidad, los modelos geológicos son generalmente construidos de modo determinístico, imposibilitando la cuantificación de la incertidumbre asociada. Si bien en la minería se le da mayor enfoque a variables continuas ...