Tadeusz BACIA’s scientific contributions

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Fig. 1 Plan of the study area marked on the site map -shows the location of structures A, B and C.
Fig. 2 Plan of the study area marked on the site map -shows the location of structures A, B and C in relation to the mining plots.
Fig. 5 Structure C of the testing ground -view of the viewing tower after the rehabilitation of the industrial water tower
Fig. 8 Structure A of the testing ground -tilt magnitude of sensor BT1229 [mm/m]
Fig. 9 Structure A of the testing ground -tilt magnitude of sensor BT1230 [mm/m]

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Monitoring system for the construction of buildings in the area of mining exploitation impact
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December 2023

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Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

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Tadeusz BACIA

Observations of building structures in mining areas, reveal the occurrence of periodic and permanent excessive loading situations. These include ground deformations associated with the extraction of underground mineral deposits. In urban areas, these deformations significantly alter the operating conditions of building structures. For this reason, forecasts of ground transformation and analyses of possible changes in the technical condition of buildings on the ground surface are made in advance, even before mining is commenced. Taking into account previous in-house experience of the observed effects of mining impacts on building structures, an original method of monitoring changes in the condition of these structures has been developed. The aim of the monitoring is to record phenomena that change the operating conditions of the structures. In the developed method, measurements are made quasi-continuously using strain and deflection sensors mounted directly on structural elements. In the mining area affected by the mining operation being carried out in the years 2020 - 2022, and with a further one planned in the years 2023 - 2024, through the extraction of 14 coal parcels, three public utilities of special interest were monitored. The measurement results of deformation changes in the elements allow for an assessment of changes in the stress state of the structures, and the integration of sensors mounted on the structures into a wireless network fulfils the demands for maintaining public safety conditions in mining areas. It also contributes to the analysis of fatigue issues in masonry structures due to long-term multidirectional loads.

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