Spatio-temporal changes in the gravity and post-mining seismic activity in abandoned deep coal mine Kazimierz-Juliusz during flooding

• Autorzy: Kotyrba Andrzej , Kortas Łukasz , Siwek Sławomir

Identyfikatory

DOI

10.46873/2300-3960.1428

• Języki publikacji: EN

Abstrakty

EN

The flooding of an underground hard coal mine, resulting in the filling of post-mining voids (workings and goafs) and the repeated saturation of pore and interstitial spaces of the adjacent rock with water, change the mass and its distribution in the near-surface part of the earth’s crust. This process is slow and lasts many years. As a result, the local gravity field undergoes dynamic changes. It depends on the surface morphology and the density of geological strata, which is related to their water content. Changes in the local gravity field can be monitored by periodic gravity surveys performed in the area of the flooded mine using portable spring gravimeters. This paper presents the results of gravity monitoring surveys conducted in the area of the abandoned coal mine Kazimierz-Juliusz (K-J) in Poland, which is in the process of flooding. Gravity surveys were conducted at yearly intervals spanning 2021-2023. We used a high-precision CG-6 gravity meter manufactured by Scintrex LTD, allowing for relative gravity measurement with an accuracy of order 0.005 mGal. In the collected data set, the rates of annual gravity change ranged from -0.04 mGal to 0.04 mGal. The K-J mine was closed in 2016, and since then, the rock mass in the zone between the deepest workings (about 750 m) and the surface has been undergoing repeated water saturation. In 2021-2023, the water table in carboniferous rock mass was located at an estimated depth of 380 m and moved up to a depth of 330 m. An average yearly increase of the water table level oscillated around 18 m per year. During this period, over 50 seismic tremors of local magnitude ranging from 0.6-2 and ground deformations on the surface were recorded in the K-J mine’s area. Surface deformations recorded in this area by GNSS surveys had a form of subsidence and uplifts. The annual rates of surface movements ranged between -11 cm (subsiding regions) and +3 cm (uplifting regions). The main objective of this paper is to identify the relationship between seismic phenomena and observed variations in the local gravity field distribution, factoring in the mining activity performed and changes in terrain relief. However, the data presented in the article indicate that in the coal mines, in the process of flooding, there are threats to the surface similar to those during the mining period (surface deformations and soil vibrations). In view of the collected data, their intensity is lower than of those observed during the mine’s operation. As the gravity field is the primary factor shaping the dynamics of a geological medium, the research results indicate that gravity monitoring is essential in studies of safety in post-mining lands.

Słowa kluczowe

EN

coal; mines; liquidation; flooding; gravity; seismicity

PL

węgiel; kopalnie; likwidacja; powodzie; grawitacja; sejsmiczność

• Wydawca: Elsevier ; Główny Instytut Górnictwa
• Czasopismo: Journal of Sustainable Mining
• Rocznik: 2024
• Tom: Vol. 23, iss. 4
• Strony: 357--372
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Kotyrba Andrzej

• Central Mining Institute, Department of Geology, Geophysics and Surface Protection, Poland

• https://orcid.org/0000-0003-4542-3114

autor

Kortas Łukasz

• Central Mining Institute, Department of Geology, Geophysics and Surface Protection, Poland

• https://orcid.org/0000-0001-7276-0955

autor

Siwek Sławomir

• Central Mining Institute, Department of Geology, Geophysics and Surface Protection, Poland

• https://orcid.org/0000-0002-3572-9702

Bibliografia

• [1] Fajklewicz Z. Mikrograwimetria górnicza. Katowice: Wydawnictwo Śląsk; 1980.
• [2] Fajklewicz Z. Grawimetria stosowana. Kraków: Uczelniane Wydawnictwa Naukowo-Dydaktyczne AGH; 2007.
• [3] McGarr A, Simpson D, Seeber L. Case histories of induced and triggered seismicity. In: Lee WHK, Kanamori H, Jennings PC, Kisslinger C, editors. International handbook of earthquake and engineering seismology, part A. London: Academic Press; 2002. p. 647-61.
• [4] Lasocki S, Orlecka-Sikora B. Anthropogenic seismicity related to exploitation of georesources. In: Gupta H, editor. Encyclopedia of solid earth geophysics. Encyclopedia of earth sciences series. Cham: Springer; 2020. https://doi.org/10.1007/978-3-030-10475-7_277-1.
• [5] Bukowska M, Cmiel S. Charakterystyka zmian własności skał karbonskich w strefach tektoniki nieciągłej w Górnosląskim Zagłębiu Węglowym. Górnictwo i Inżynieria 2011;35(2): 111-9.
• [6] Dubinski J, Stec K, Bukowska M. Geomechanical and tectonophysical conditions of mining-induced seismicity in the Upper Silesian Coal Basin in Poland: a case study. Arch Min Sci 2019;64(1):163-80.
• [7] Luo Y. Effects of water in inactive room and pillar coal mines on causing and preventing surface subsidence. COJ Tech Sci Res 2021;3(5):000571. COJTS.
• [8] Szewioła-Sokoła V, Kotyrba A, Al Heib M, editors. Methods on assessment and monitoring of seismic hazards in coal post-mining areas. Guidelines. Silesian University Publishing House. Gliwice; 2023.
• [9] Kotyrba A, Balicki A, Kortas Ł. Zmiany regionalnego pola grawitacji w północnej części Górnośląskiego Zagłębia Węglowego w latach 2002-2003. Przegląd Geologiczny Tom 2005;53(4):299-305. Warszawa.
• [10] Kotyrba A. Czasowe zmiany pola siły ciężkości w Górnośląskim Zagłębiu Węglowym i ich związek z eksploatacją górniczą. Przegląd Górniczy 2014;5:48-57.
• [11] Kortas Ł. Gravity field changes during deep exploitation of the coal longwall and their relation to stress distribution and seismic activity. J Sustain Min 2021;20(4):228-40. Article 3.
• [12] Kotyrba A. Grawimetryczny system ciągłej obserwacji wstrząsów indukowanych działalnością górniczą. Przegląd Górniczy 2022;1:s.37-47.
• [13] Contrucci I, Namjesnik D, Niemz P, Primo Doncel P, Kotyrba A, Mutke G, Konicek P, Dominique P, Rudolph T, Möllerherm S, Kinscher J, Klein E, Cesca S. European feedback on post-mining seismicity. J Sustain Min 2023;22(3):3.
• [14] Primo Doncel P, Kotyrba A, Cesca S, Sokola-Szewiola V, Konicek P, Kajzar V, Schreiber J, Contrucci I, Jirankova E, PostMinQuake Dominique P. Seismicity of selected closed European hard coal mines during flooding. Zeitschrift der Deutschen Gesellschaft für Geowissenschaften ZDGG 2023; 173(4):533-49.
• [15] www.postminquake.eu.
• [16] Buła Z, Kotas A. Geological atlas of the upper silesian Coal Basin. Warszawa: Panstwowy Instytut Geologiczny; 1994.
• [17] www.grss.gig.eu.
• [18] Bałtrukiewicz M, Onopiuk M. OPE Sosnowiec Cykl 1 - 07. https://zenodo.org/records/10906635; 2021.
• [19] Bałtrukiewicz M, Onopiuk M. OPE Sosnowiec Cykl 2 - 07. https://zenodo.org/records/10906770; 2022.
• [20] Bałtrukiewicz M, Onopiuk M. OPE Sosnowiec Cykl 3 - 05. https://zenodo.org/records/10906799; 2023.
• [21] https://egms.land.copernicus.eu/.
• [22] Mutke G, Kotyrba A, Lurka A, Olszewska D, Dykowski P, Borkowski A, Araszkiewicz A, Baranski A. Upper silesian geophysical observation system - a unit of the EPOS project journal of sustainable mining 2019;18(4):198-207.
• [23] https://episodesplatform.eu/?lang=pl.