Assessment Of Slopes Endangered
By Groundwater
Author(s)
P. P. Prochazka & J. Trckova
Abstract
In many cases of deposits like tailings from open pit mines, the environment is
damaged by the long extension of the slopes. Steeper slopes have a better
influence on the landscape. On the other hand, the basic problem is caused by
ground water, which a posteriori, after completing the construction of these
structures, seeps through the foundation of the slopes. It is very important that no
reclaim helps to solve this problem. If the deposits are founded in the wrong
way, i.e. in the foundations where no disturbances of capillary water are applied,
new methods have to be employed in order to stabilize the slopes. Before this,
studies concerning the influence of ground water on the slope stability of the
deposits have to be carried out. Natural slopes cannot practically be assessed, as
the expanses involved in such tests are enormous. This is why scale models are
prepared, together with numerical analysis based on coupled modeling. The
influence of water is simulated by free internal parameters, which describe the
extent of the hydration. On the other hand, geotechnical parameters change
according to rules determined in the laboratory. Such a complex discussion can
then be a starting point for several improvements of the slopes. The coupled
modeling (scale and numerical) is applied to prepare a parametric study of tailing
dams in Northern Bohemia, where large problems occurred because of the
moving of current slopes against existing villages in this region. Scale models
have been created in compliance with real situations and the results from them
implemented in mathematical models. A parametric study was carried out using
the numerical models.
Keywords: tailing dams, Desai’s distinct state model, scale modeling, numerical
modeling, coupled modeling.
Keywords
tailing dams, Desai’s distinct state model, scale modeling, numerical
modeling, coupled modeling.
Related Book
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