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Assessment of sinkhole hazard in the post-mining area using the ERT method and numerical modeling

Ścigała Roman, Szafulera Katarzyna, Jendryś Marek

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2023

nr 75 (147)

20--34

The loss of stability of shallow voids existing in the rock mass often results in the formation of sinkholes on the surface. This has a significant impact on the threat to public safety. Therefore, it is crucial to recognize the presence of such voids, especially in old post-mining areas, where shallow extraction was previously conducted, and there is a lack of mapping documentation indicating the location of underground workings. This paper presents an example illustrating a proposed procedure for recognizing shallow voids, which consists of two research works: geophysical research combined with numerical analyzes used as a kind of forward modeling. This combination increases the possibility of accurately locating potential sinkhole occurrences. The first part of this article provides selected literature information on the occurrence of sinkhole hazards. The second part presents the results of subsurface layer investigations of the rock mass conducted using electrical resistivity tomography (ERT). The third part focuses on assessing the threat of sinkhole formation by using forward numerical modeling performed with the FLAC 3D software to confirm the subsurface structures identified through the ERT method. The results of the analyzes conducted with both methods are then discussed in terms of their suitability for assessing the associated risk. The research conducted within the framework of this study confirms the effectiveness of the ERT method combined with numerical modeling for evaluating the state of the rock mass. This method can be considered a valuable tool for supporting decision-making in identifying post-mining areas that are particularly at risk of sinkhole formation.

Ocena przydatności terenów pogórniczych do celów budowlanych w rejonach dawnej płytkiej eksploatacji górniczej

Mzyk T., Gorol M.

Systemy Wspomagania w Inżynierii Produkcji

2017

Vol. 6, iss. 3

160--170

W artykule przedstawiono problematykę oceny warunków geologiczno-górniczych terenów zlikwidowanych kopalń. Wykazano konieczność zaangażowania projektanta budowlanego i inwestora w identyfikację i rozpoznanie zagrożeń wynikających z możliwości powstania deformacji, w szczególności wskutek występowania płytkich zrobów górniczych. Przedstawiono problem rozproszenia materiałów i informacji źródłowych w licznych instytucjach. Problematykę oceny przydatności terenu do zabudowy przedstawiono na wybranym przykładzie.

The article presents the problem of assessment of geological-mining areas of closed mines. It has been demonstrated the need to involve a designer and building investor in the identification and recognition of the risks of deformations in particular with localized shallow excavations. Presents the problem of scattering materials and basic information. The issue of assessing the suitability of land for building shown in the example chosen.