New prediction models for mean particle size in rock blast fragmentation

P. H.S.W. Kulatilake, T. Hudaverdi, Qiong Wu

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25 Atıf (Scopus)

Özet

The paper refers the reader to a blast data base developed in a previous study. The data base consists of blast design parameters, explosive parameters, modulus of elasticity and in situ block size. A hierarchical cluster analysis was used to separate the blast data into two different groups of similarity based on the intact rock stiffness. The group memberships were confirmed by the discriminant analysis. A part of this blast data was used to train a single-hidden layer back propagation neural network model to predict mean particle size resulting from blast fragmentation for each of the obtained similarity groups. The mean particle size was considered to be a function of seven independent parameters. An extensive analysis was performed to estimate the optimum value for the number of units for the hidden layer for each of the obtained similarity groups. The blast data that were not used for training were used to validate the trained neural network models. For the same two similarity groups, multivariate regression models were also developed to predict mean particle size. Capability of the developed neural network models as well as multivariate regression models was determined by comparing predictions with measured mean particle size values and predictions based on one of the most applied fragmentation prediction models appearing in the blasting literature. Prediction capability of the trained neural network models as well as multivariate regression models was found to be strong and better than the existing most applied fragmentation prediction model. Diversity of the blasts data used is one of the most important aspects of the developed models.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)665-684
Sayfa sayısı20
DergiGeotechnical and Geological Engineering
Hacim30
Basın numarası3
DOI'lar
Yayın durumuYayınlandı - Haz 2012

Finansman

Acknowledgments This study was partially supported by the Research Fund of the Istanbul Technical University (project name: ‘the investigation of environmentally friendly blast designs for improvement of fragmentation in Istanbul region quarries’). The authors are grateful to the Research Fund of the Istanbul Technical University for their financial support.

FinansörlerFinansör numarası
Istanbul Teknik Üniversitesi

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