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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 50
INNOVATION IN COMPUTER METHODS FOR CIVIL AND STRUCTURAL ENGINEERING
Edited by: B.H.V. Topping and M.B. Leeming
Paper I.3

Characterization of Ground Subsidence of Abandoned Mines

Y. Najjar*, M. Zaman#, J.L. Ahern# and J.G. Laguros#

*Kansas State University, Manhattan, United States of America
#University of Oklahoma, Norman, United States of America

Full Bibliographic Reference for this paper
Y. Najjar, M. Zaman, J.L. Ahern, J.G. Laguros, "Characterization of Ground Subsidence of Abandoned Mines", in B.H.V. Topping, M.B. Leeming, (Editors), "Innovation in Computer Methods for Civil and Structural Engineering", Civil-Comp Press, Edinburgh, UK, pp 23-30, 1997. doi:10.4203/ccp.50.1.3
Abstract
Ground subsidence due to abandoned mines is mathematically modeled using a two-dimensional plane strain nonlinear finite element idealization approach. Three types of constitutive models are employed: linear elastic, Drucker-Prager, and elastoplastic single surface model with isotropic hardening. The finite element technique employed can accurately simulate an underground excavation operation in a sequential manner. Subsidence profiles and presented employing the nonlinear incremental-iterative finite element method adapted from the DP model. Parametric studies were conducted to investigate the effect of modulus of elasticity and the cohesion of the materials on the displacement profile and the distribution of stresses. By far the chat pile appears to be a dominant influential factor in causing subsidence.

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