Deformations assessment of phosphogypsum waste heap in Wiślinka after 15 years of its reclamation

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Publication Title
Deformations assessment of phosphogypsum waste heap in Wiślinka after 15 years of its reclamation

Abstract
The article presents an analysis of the long-term response of the phosphogypsum waste heap in Wiślinka, Poland, almost 15 years after its reclamation. The behaviour of such heaps is an important issue since phosphogypsum has no industrial application so far and, consequently, such structures will become a part of the landscape or even a substructure. The heap deformations are assessed based on the results of two monitoring systems consisting of survey markers and inclinometers installed at various periods. In the analysis, available historical records combined with the most current records obtained in the course of the ongoing project are implemented. The crest of the slope of the oldest part of the heap settled by 2.5 m over the last 20 years. The settlement progresses with rate of up to 66 mm/year, which is 75% lower than in 2007. Horizontal displacements of the heap slope are also observed with the rate 11 mm/year and have remained constant since at least 2019. Based on these results and further investigations being currently carried out, the hypothesis concerning the existence of 3 different mass movements of some parts of the heap has been stated. To verify the hypothesis, a monitoring system has been developed and new results will be analysed during the course of the project that is still ongoing.
Authors
Aleksandra Paulina Korzec; Waldemar Swidzinski

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

C - Risk analysis and safety evaluation

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