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Geomechanics and Engineering
  Volume 33, Number 6, June25 2023 , pages 567-581

Predicting the rock fragmentation in surface mines using optimized radial basis function and cascaded forward neural network models
Xiaohua Ding, Moein Bahadori, Mahdi Hasanipanah and Rini Asnida Abdullah

    The prediction and achievement of a proper rock fragmentation size is the main challenge of blasting operations in surface mines. This is because an optimum size distribution can optimize the overall mine/plant economics. To this end, this study attempts to develop four improved artificial intelligence models to predict rock fragmentation through cascaded forward neural network (CFNN) and radial basis function neural network (RBFNN) models. In this regards, the CFNN was trained by the Levenberg-Marquardt algorithm (LMA) and Conjugate gradient backpropagation (CGP). Further, the RBFNN was optimized by the Dragonfly Algorithm (DA) and teaching-learning-based optimization (TLBO). For developing the models, the database required was collected from the Midouk copper mine, Iran. After modeling, the statistical functions were computed to check the accuracy of the models, and the root mean square errors (RMSEs) of CFNN-LMA, CFNN-CGP, RBFNN-DA, and RBFNN-TLBO were obtained as 1.0656, 1.9698, 2.2235, and 1.6216, respectively. Accordingly, CFNN-LMA, with the lowest RMSE, was determined as the model with the best prediction results among the four examined in this study.
Key Words
    blasting; cascaded forward neural network; fragmentation; prediction models; radial basis function neural network
Xiaohua Ding: School of Mines, China University of Mining and Technology, Xuzhou 221116, China;
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
Moein Bahadori: Faculty of Engineering, University of Gonabad, Khorasan-e-Razavi, Iran
Mahdi Hasanipanah and Rini Asnida Abdullah: Department of Geotechnics and Transportation, Faculty of Civil Engineering, Universiti Teknologi Malaysia,
Skudai 81310, Johor Bahru, Malaysia

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