Numerical simulation of acoustic emission in rocks using FEM/DEM

G. Grasselli, Q. Zhao, A. Lisjak, Q. Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Acoustic Emissions (AE) are stress waves released by localized inelastic deformation events during the progressive failure of brittle rocks. Although several numerical methods have been developed to simulate the deformation and damage processes of rocks, only a limited number have been capable of providing quantitative information regarding the associated acoustic activity. FEM/DEM is a numerical tool that simulates material failure by explicitly modelling fracture nucleation and propagation using cohesive elements. Seismic information is extracted with a newly developed algorithm based on the monitoring of internal variables in the proximity of propagating cracks. Several simulation cases were analyzed, including a point source model, a wing crack propagation model, and a circular excavation model. Simulated AE were cross-analyzed by travel-time inversion, spectral analysis, and frequency-magnitude statistics. These preliminary results demonstrate the capabilities of FEM/DEM as a tool to numerically simulate seismicity associated to the rock failure process.

Original languageEnglish
Title of host publicationRock Dynamics and Applications - State of the Art
Subtitle of host publicationProceedings of the 1st International Conference on Rock Dynamics and Applications, RocDyn-1 2013
Pages149-159
Number of pages11
Publication statusPublished - 2013
Externally publishedYes
Event1st International Conference on Rock Dynamics and Applications, RocDyn-1 2013 - Lausanne, Switzerland
Duration: 6 Jun 20138 Jun 2013

Publication series

NameRock Dynamics and Applications - State of the Art: Proceedings of the 1st International Conference on Rock Dynamics and Applications, RocDyn-1 2013

Conference

Conference1st International Conference on Rock Dynamics and Applications, RocDyn-1 2013
Country/TerritorySwitzerland
CityLausanne
Period6/06/138/06/13

ASJC Scopus subject areas

  • Geology

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