Numerical Procedure for Dynamic Simulation of Discrete Fractures Due to Blasting

Summary This paper describes development of a generic nonlinear, dynamic modelling technique to simulate discrete rock fractures due to blasting using the finite element method. The element elimination technique together with a brittle, Rankine failure-type material model are used as a means to simu...

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Bibliographic Details
Published in:Rock mechanics and rock engineering 2008-10, Vol.41 (5), p.641-670
Main Authors: Saharan, M. R., Mitri, H. S.
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Civil Engineering
Computation methods. Tables. Charts
Earth and Environmental Science
Earth Sciences
Exact sciences and technology
Finite element analysis
Fractures
Geological engineering
Geophysics/Geodesy
Geotechnics
Mathematical models
Rocks
Simulation
Soil mechanics. Rocks mechanics
Structural analysis. Stresses
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Summary:Summary This paper describes development of a generic nonlinear, dynamic modelling technique to simulate discrete rock fractures due to blasting using the finite element method. The element elimination technique together with a brittle, Rankine failure-type material model are used as a means to simulate the initiation and growth of fractures in the rock under the effect of blast-induced dynamic pressure pulse. Dynamic loads representing ideal and non-ideal detonations are simulated and a new method, termed as optimised pressure profile, is proposed to approximate the pressure-time profile of the blast load to model the dynamic load. Comparison of numerical model results with previously reported observations from the literature reveals the ability of the model as a predictive tool and supports the validity of the developed modelling procedure.
ISSN:0723-2632
1434-453X
DOI:10.1007/s00603-007-0136-9