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A conceptual open pit mine architecture for the Moon environment

Seweryn Karol, Kolusz Adam, Świca Izabela, Tkacz Arkadiusz, Gallina Alberto, Katzer Jacek, Kobaka Janusz, Konecny Petr, Młynarczyk Przemysław

Artificial Satellites : Journal of Planetary Geodesy

2024

Vol. 59, No. 1

11--41

In situ resource utilization (ISRU) activities are receiving increasing attention, both from space agencies and among the international science and industrial community. Prominent examples of ongoing ISRU space programs are the NASA Artemis program and the Terrae Novae program run by the European Space Agency. In technical sciences, there are at least three groups of activities related to ISRU: prospecting bodies in the context of space missions, technological investigations related to surface infrastructure and operations, and conceptual analyses of future mining activities. The present paper belongs to the third group and brings new insights into a potential open pit mine operating on the Moon. There are several novel contributions: the definition of the objectives of the mine, based on economic indicators; a conceptual description of a pit architecture dedicated to excavating ilmenite-rich feedstock; and a qualitative and quantitative description of the chosen processes and the mine’s topology. In the paper, there are also added links to other papers connected with ISRU activities.

Limitations of FEM modelling of chloride diffusion when considering different parameters of binary and ternary concrete mixtures

Lehner Petr, Hornakova Marie, Konecny Petr

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

2020

Vol. 9 Nr 2

61--69

The numerical modelling of chloride diffusion in concrete structures requires an appropriate description of input parameters. The main inputs for the model are the diffusion coefficient of concrete and derived aging factor. The model itself can be susceptible to the values of these parameters because of the size of the finite elements and size of the time step. Due to the potential use in probabilistic calculations, which requires millions of simulations, it is desirable to create a highly optimized model. It is important to pay attention to the accuracy of the calculation, but also to its calculation time. The presented results show the possible limits of the finite element model of the diffusion in a concrete structure. This is demonstrated on the reference ordinary Portland cement mixture and 32 various binary and ternary concrete mixtures, which show a significant effect of different diffusion coefficients and aging factors on the overall convergence. This study provides guidance on which extreme material parameters, out of the potential range, may adversely affect model results.