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Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model

Workability is a key performance criterion for mining cemented tailing backfill, which should be defined in terms of rheological parameters such as yield stress and plastic viscosity. Cemented tailing backfill is basically composed of mill tailings, Portland cement, or blended cement with supplement...

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Autores principales: Lang, Liu, Song, KI-IL, Lao, Dezheng, Kwon, Tae-Hyuk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455541/
http://dx.doi.org/10.3390/ma8052076
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author Lang, Liu
Song, KI-IL
Lao, Dezheng
Kwon, Tae-Hyuk
author_facet Lang, Liu
Song, KI-IL
Lao, Dezheng
Kwon, Tae-Hyuk
author_sort Lang, Liu
collection PubMed
description Workability is a key performance criterion for mining cemented tailing backfill, which should be defined in terms of rheological parameters such as yield stress and plastic viscosity. Cemented tailing backfill is basically composed of mill tailings, Portland cement, or blended cement with supplementary cement material (fly ash and blast furnace slag) and water, among others, and it is important to characterize relationships between paste components and rheological properties to optimize the workability of cemented tailing backfill. This study proposes a combined model for predicting rheological parameters of cemented tailing backfill based on a principal component analysis (PCA) and a back-propagation (BP) neural network. By analyzing experimental data on mix proportions and rheological parameters of cemented tailing backfill to determine the nonlinear relationships between rheological parameters (i.e., yield stress and viscosity) and mix proportions (i.e., solid concentrations, the tailing/cement ratio, the specific weight, and the slump), the study constructs a prediction model. The advantages of the combined model were as follows: First, through the PCA, original multiple variables were represented by two principal components (PCs), thereby leading to a 50% decrease in input parameters in the BP neural network model, which covered 98.634% of the original data. Second, in comparison to conventional BP neural network models, the proposed model featured a simpler network architecture, a faster training speed, and more satisfactory prediction performance. According to the test results, any error between estimated and expected output values from the combined prediction model based on the PCA and the BP neural network was within 5%, reflecting a remarkable improvement over results for BP neural network models with no PCA.
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spelling pubmed-54555412017-07-28 Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model Lang, Liu Song, KI-IL Lao, Dezheng Kwon, Tae-Hyuk Materials (Basel) Article Workability is a key performance criterion for mining cemented tailing backfill, which should be defined in terms of rheological parameters such as yield stress and plastic viscosity. Cemented tailing backfill is basically composed of mill tailings, Portland cement, or blended cement with supplementary cement material (fly ash and blast furnace slag) and water, among others, and it is important to characterize relationships between paste components and rheological properties to optimize the workability of cemented tailing backfill. This study proposes a combined model for predicting rheological parameters of cemented tailing backfill based on a principal component analysis (PCA) and a back-propagation (BP) neural network. By analyzing experimental data on mix proportions and rheological parameters of cemented tailing backfill to determine the nonlinear relationships between rheological parameters (i.e., yield stress and viscosity) and mix proportions (i.e., solid concentrations, the tailing/cement ratio, the specific weight, and the slump), the study constructs a prediction model. The advantages of the combined model were as follows: First, through the PCA, original multiple variables were represented by two principal components (PCs), thereby leading to a 50% decrease in input parameters in the BP neural network model, which covered 98.634% of the original data. Second, in comparison to conventional BP neural network models, the proposed model featured a simpler network architecture, a faster training speed, and more satisfactory prediction performance. According to the test results, any error between estimated and expected output values from the combined prediction model based on the PCA and the BP neural network was within 5%, reflecting a remarkable improvement over results for BP neural network models with no PCA. MDPI 2015-04-23 /pmc/articles/PMC5455541/ http://dx.doi.org/10.3390/ma8052076 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lang, Liu
Song, KI-IL
Lao, Dezheng
Kwon, Tae-Hyuk
Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model
title Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model
title_full Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model
title_fullStr Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model
title_full_unstemmed Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model
title_short Rheological Properties of Cemented Tailing Backfill and the Construction of a Prediction Model
title_sort rheological properties of cemented tailing backfill and the construction of a prediction model
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455541/
http://dx.doi.org/10.3390/ma8052076
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AT kwontaehyuk rheologicalpropertiesofcementedtailingbackfillandtheconstructionofapredictionmodel