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A new fracture model for the prediction of longwall caving characteristics

Journal Article


Abstract


  • A new numerical model is presented to simulate fracture initiation and propagation in geological structures. This model is based on the recent amalgamation of established failure and fracture mechanics theory, which has been implemented to the finite difference FLAC code as a constitutive FISH user-defined-model. Validation of the model has been studied on the basis of comparing the transitional failure modes in rock. It is shown that the model is capable of accurately simulating fracture distributions over entire brittle to ductile rock phases. The application of the model during longwall retreat simulation highlighted several caving characteristics relevant to varying geological condition. The distribution and behaviour of modelled fractures were both realistic and shown to provide an enhanced post failure analysis to geological structures in FLAC. Moreover, the model introduces new potential insight towards the failure analysis of more complicated problems. This is best suited towards improving safety and efficiency in mines through the prediction of various key fractures and caving characteristics of geological structures. © 2014.

UOW Authors


  •   Venticinque, Gaetano (external author)
  •   Nemcik, Jan (external author)
  •   Ren, Ting

Publication Date


  • 2014

Citation


  • Venticinque, G., Nemcik, J. & Ren, T. (2014). A new fracture model for the prediction of longwall caving characteristics. International Journal of Mining Science and Technology, 24 (3), 369-372.

Scopus Eid


  • 2-s2.0-84901246100

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2346

Number Of Pages


  • 3

Start Page


  • 369

End Page


  • 372

Volume


  • 24

Issue


  • 3

Abstract


  • A new numerical model is presented to simulate fracture initiation and propagation in geological structures. This model is based on the recent amalgamation of established failure and fracture mechanics theory, which has been implemented to the finite difference FLAC code as a constitutive FISH user-defined-model. Validation of the model has been studied on the basis of comparing the transitional failure modes in rock. It is shown that the model is capable of accurately simulating fracture distributions over entire brittle to ductile rock phases. The application of the model during longwall retreat simulation highlighted several caving characteristics relevant to varying geological condition. The distribution and behaviour of modelled fractures were both realistic and shown to provide an enhanced post failure analysis to geological structures in FLAC. Moreover, the model introduces new potential insight towards the failure analysis of more complicated problems. This is best suited towards improving safety and efficiency in mines through the prediction of various key fractures and caving characteristics of geological structures. © 2014.

UOW Authors


  •   Venticinque, Gaetano (external author)
  •   Nemcik, Jan (external author)
  •   Ren, Ting

Publication Date


  • 2014

Citation


  • Venticinque, G., Nemcik, J. & Ren, T. (2014). A new fracture model for the prediction of longwall caving characteristics. International Journal of Mining Science and Technology, 24 (3), 369-372.

Scopus Eid


  • 2-s2.0-84901246100

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2346

Number Of Pages


  • 3

Start Page


  • 369

End Page


  • 372

Volume


  • 24

Issue


  • 3