Abstract
In the context of potassium fertilizer production intact salt material is mined in underground mines and converted in factories. During the converting processes occurs residual material consisting of granular rock salt which is stored on large tailings heaps. The residual material has a strongly viscoplastic material behaviour. For the numerical simulation a new viscoplastic constitutive law ViscoSalt 2017 was developed and implemented into a Finite-Element-(FE) program to use it for the analysis of the stability and the serviceability of the tailings heaps and of infrastructure constructions in the area around these heaps. The strongly time-variable deformation behaviour and the strongly velocity dependent strength behaviour lead to unstoppable deformation processes of the tailings heaps with large ranges. Displacements in the area around the tailings heaps can be measured in distances of more than 200 m. For the application in engineering practice a concept for the analysis of the stability and the serviceability was developed considering the requirements of safety. The paper explains this concept using the developed constitutive law under consideration of a necessary level of safety.
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References
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Leppla, S. (2023). Numerical Analysis of Stability and Serviceability of Creeping Tailings Heaps. In: Barla, M., Di Donna, A., Sterpi, D., Insana, A. (eds) Challenges and Innovations in Geomechanics. IACMAG 2022. Lecture Notes in Civil Engineering, vol 288. Springer, Cham. https://doi.org/10.1007/978-3-031-12851-6_48
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DOI: https://doi.org/10.1007/978-3-031-12851-6_48
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