A tensile damage model for rocks: Application to blast induced damage assessment

Hamdi, Essaïeb; Romdhane, Najla Bouden; Cléac’h, J.M. Le

doi:10.1016/j.compgeo.2010.10.009

Cited by 57 publications

(20 citation statements)

References 26 publications

(41 reference statements)

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“…With rapid development of computer technology, much work has been done numerically on the behavior of the EDZ and made a substantial progress (Wang et al 2009;Pellet et al 2009;Hamdi et al 2011;Xia et al 2013). The previous numerical studies, unfortunately, are mainly concentrated on investigating separately an individual damage, the stress redistribution-induced damage alone or the blast-induced damage alone.…”

Section: List Of Symbolsmentioning

confidence: 99%

Numerical Simulation of Rock Mass Damage Evolution During Deep-Buried Tunnel Excavation by Drill and Blast

Yang

et al. 2014

Rock Mech Rock Eng

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Presence of an excavation damage zone (EDZ) around a tunnel perimeter is of significant concern with regard to safety, stability, costs and overall performance of the tunnel. For deep-buried tunnel excavation by drill and blast, it is generally accepted that a combination of effects of stress redistribution and blasting is mainly responsible for development of the EDZ. However, few open literatures can be found to use numerical methods to investigate the behavior of rock damage induced by the combined effects, and it is still far from full understanding how, when and to what degree the blasting affects the behavior of the EDZ during excavation. By implementing a statistical damage evolution law based on stress criterion into the commercial software LS-DYNA through its user-subroutines, this paper presents a 3D numerical simulation of the rock damage evolution of a deep-buried tunnel excavation, with a special emphasis on the combined effects of the stress redistribution of surrounding rock masses and the blasting-induced damage. Influence of repeated blast loadings on the damage extension for practical millisecond delay blasting is investigated in the present analysis. Accompanying explosive detonation and secession of rock fragments from their initial locations, in situ stress in the immediate vicinity of the excavation face is suddenly released. The transient characteristics of the in situ stress release and induced dynamic responses in the surrounding rock masses are also highlighted. From the simulation results, some instructive conclusions are drawn with respect to the rock damage mechanism and evolution during deep-buried tunnel excavation by drill and blast.

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Section: List Of Symbolsmentioning

confidence: 99%

Numerical Simulation of Rock Mass Damage Evolution During Deep-Buried Tunnel Excavation by Drill and Blast

Yang

et al. 2014

Rock Mech Rock Eng

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“…The critical damage of both concretes is determined by using mechanics theory of continuous damage based on the variances of stress-strain diagrams with strain rate. A variable (D cr ) is used to define the critical damage as following [74][75][76]:…”

Section: Critical Damagementioning

confidence: 99%

Late Age Dynamic Strength of High-Volume Fly Ash Concrete with Nano-Silica and Polypropylene Fibres

Mussa

Abdulhadi

Abbood³

et al. 2020

Crystals

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The dynamic behaviour of high-volume fly ash concrete with nano-silica (HVFANS) and polypropylene fibres at curing ages of 7 to 90 days was determined by using a split Hopkinson pressure bar (SHPB) machine. At each curing age, the concrete samples were laboratory tested at different temperatures conditions under strain rates reached up to 101.42 s−1. At room temperature, the results indicated that the dynamic compressive strength of plain concrete (PC) was slightly higher than HVFANS concrete at early curing ages of 7 and 28 days, however, a considerable improvement in the strength of HVFANS concrete was noted at a curing age of 90 days and recorded greater values than PC owing to the increase of fly ash reactivity. At elevated temperatures, the HVFANS concrete revealed a superior behaviour than PC even at early ages in terms of dynamic compressive strength, critical strain, damage and toughness due to increase of nano-silica (NS) activity during the heating process. Furthermore, equations were suggested to estimate the dynamic increase factor (DIF) of both concretes under the investigated factors.

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“…With the increasing scale of these operations, a proper design of blasts and control as well as prediction of blast results has become imperative in most operations [1][2][3][4][5]. The capability of predicting the dynamic response of the rock mass is important, so that the effect of various blast design parameters and explosive types can be investigated with field experiments and numerical simulations [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the complete rock blasting response by SPH–DAM–FEM approach

Chen

et al. 2015

Simulation Modelling Practice and Theory

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A tensile damage model for rocks: Application to blast induced damage assessment

Cited by 57 publications

References 26 publications

Numerical Simulation of Rock Mass Damage Evolution During Deep-Buried Tunnel Excavation by Drill and Blast

Numerical Simulation of Rock Mass Damage Evolution During Deep-Buried Tunnel Excavation by Drill and Blast

Late Age Dynamic Strength of High-Volume Fly Ash Concrete with Nano-Silica and Polypropylene Fibres

Numerical simulation of the complete rock blasting response by SPH–DAM–FEM approach

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