Numerical Modeling Of Contaminant Dispersion
From Underground Mine Repositories
Author(s)
A. Peratta & V. Popov
Abstract
One of the tasks of the FP5 EC project Low Risk Disposal Technology
(LowRiskDT) was to determine the capacity of reference mine repositories to
provide safe and permanent isolation of chemical waste. Calculations were made
of the isolating capacity of reference repositories in terms of the concentration of
hazardous ion species appearing in the far-field groundwater. Relevant flow and
dispersion models were applied to the reference cases representing different rock
structures and flow path patterns. The release and migration of dissolved
hazardous chemical species with special respect to groundwater protection are
determined. A numerical tool has been developed that can be used for analysis of
transport of contaminants from underground repositories. The tool can take into
account fracture zones, non-homogeneous domains, and can be used to model
the processes in the far field, near field and on the interface of the far field and
near field. The waste-isolating capacity has been estimated for underground
mines in two types of geological media: crystalline rock and limestone. The
repository consists of a large room filled with hazardous waste embedded in
clay, where in the case of crystalline host rock, there is also a tunnel extending
from the room which is also used as a repository, and there a number of fracture
zones that intersect the domain and some of them intersect the excavation-disturbed
zone (EDZ). Two types of hazardous waste were considered:
Dichlorvos and batteries/zinc, but in this paper only the results for Diclorvos are
reported.
Keywords: hazardous waste disposal, underground mines, numerical modelling.
1 Introduction
This paper contains details on the safety assessment of the proposed LowRiskDT
approach for disposal of hazardous waste in abandoned underground mines. The
Keywords
hazardous waste disposal, underground mines, numerical modelling.
Related Book
Other papers in this volume
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