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Stress-Strain Prediction of Jointed Rocks using Artificial Neural Networks

Arunakumari, G and Latha, Madhavi G (2008) Stress-Strain Prediction of Jointed Rocks using Artificial Neural Networks. In: The 12th International Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), 1-6 October, 2008, Goa, India.

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The applicability of Artificial Neural Networks for predicting the stress-strain response of jointed rocks at varied confining pressures, strength properties and joint properties (frequency, orientation and strength of joints) has been studied in the present paper. The database is formed from the triaxial compression tests on different jointed rocks with different confining pressures and different joint properties reported by various researchers. This input data covers a wide range of rock strengths, varying from very soft to very hard. The network was trained using a 3 layered network with feed forward back propagation algorithm. About 85% of the data was used for training and remaining15% for testing the predicting capabilities of the network. Results from the analyses were very encouraging and demonstrated that the neural network approach is efficient in capturing the complex stress-strain behaviour of jointed rocks. A single neural network is demonstrated to be capable of predicting the stress-strain response of different rocks, whose intact strength vary from 11.32 MPa to 123 MPa and spacing of joints vary from 10 cm to 100 cm for confining pressures ranging from 0 to 13.8 MPa.

Item Type: Conference Paper
Keywords: jointed rocks;joint properties;stress-strain behavior;ANN; training and testing
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 13 Oct 2011 10:59
Last Modified: 13 Oct 2011 10:59
URI: http://eprints.iisc.ac.in/id/eprint/40803

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