Paper Title:
Numerical Analysis of Damage to Retained Rock Mass of Dam Foundation Caused by Blasting Excavation
  Abstract

On basis of the existed TCK model, the establishment process of a new rock blasting damage model is discussed by considering the relationship of crack density Cd, which indicates the shock damage extent of rock, and sound wave attenuation coefficient ap. Then, this model is inserted into the user-defined material model library of ANSYS/LS-DYNA3D software to construct the new damage model. Numerical simulation of damage to retained rock mass of dam foundation caused by rock blasting excavation in dam region with this model. Calculation results show that: as far as the blasting parameters and geological conditions in this paper, the damage to retained rock mass below caused by rock blasting excavation above is basically limited to the scope of 1.5m below the bottom of blasthole, and damage degree gradually reduces from the bottom of blasthole to faraway. Meanwhile, blasting will not cause rock mass to open along soft layer inside, whose maximum calculation displacement is only 3mm. The calculation result can be referred by the practical engineering.

  Info
Periodical
Advanced Materials Research (Volumes 255-260)
Edited by
Jingying Zhao
Pages
4256-4261
DOI
10.4028/www.scientific.net/AMR.255-260.4256
Citation
H. Y. Liu, M. Wang, "Numerical Analysis of Damage to Retained Rock Mass of Dam Foundation Caused by Blasting Excavation", Advanced Materials Research, Vols. 255-260, pp. 4256-4261, 2011
Online since
May 2011
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Price
$35.00
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