Abstract
The paper presents the issue of categorization of mining areas of liquidated coal mines in terms of land development limitations. The authors have presented their observations regarding the determination of hazard zones resulting from the presence of linear and surface discontinuous deformations, excessive subsidence and tilt zones as well as the duration of the final phase of deformation process.
Highlights
The environmental impact of mining exploitation encompasses a wide spectrum of factors, occurring both: during the exploitation as well as after the completion of mining works or liquidation of the mine
According to the guidelines of documenting geological and engineering conditions for the purposes of mine closure [1], the classification of mining area based on the limitations in use for development purposes does not directly encompass boreholes
The remaining areas of linear discontinuous deformations in the area of the overlapping exploitation edges have not been classified into this category. Such assumption was made due to the fact that the probability of activation of formerly identified discontinuous deformations without a direct impact of planned mining exploitation and other factors related to mining operations is rather low
Summary
The environmental impact of mining exploitation encompasses a wide spectrum of factors, occurring both: during the exploitation as well as after the completion of mining works or liquidation of the mine. Based on the experience described broadly in professional literature, a special hazard to structures on the surface is caused by shallow extraction fields and roadways including development headings (shafts, ore passes, dip headings and boreholes). These workings, especially the ones from the times in which the liquidation was not properly conducted, pose a potential hazard of discontinuous surface deformations. This paper takes up the issues of determining the limits of hazard zones occurring due to the possibility of discontinuous surface deformations and linear deformations, as well as zones of excessive subsidence, tilt and the related changes of hydrological conditions and the duration of the final phase of deformations. The limits are determined to specify the categories of the mining areas of liquidated mines pertaining to land use limitations
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