Acta Geodynamica et Geomaterialia

Title: APPLICATION OF PSINSAR FOR ASSESSMENT OF SURFACE DEFORMATIONS IN POST_MINING AREA _ CASE STUDY OF THE FORMER WALBRZYCH HARD COAL BASIN (SW POLAND)
Authors: Milczarek Wojciech, Blachowski Jan and Grzempowski Piotr
DOI: 10.13168/AGG.2016.0026
Journal: Acta Geodynamica et Geomaterialia, Vol. 14, No. 1 (185), Prague 2017
Full Text: PDF file (2.8 MB)
Keywords: PSInSAR, secondary deformations, coal mining, former mining grounds
Abstract: The study presents results of surface displacements calculated with the PSInSAR technique for the area of the former Wałbrzych Hard Coal Basin (WHCB) in SW Poland. Underground mining of hard coal took place there until the late 90’ties of the 20th Century. In accordance with the present state of knowledge, secondary deformations are a common phenomenon on post-mining areas. The chosen monitoring technique has provided data and has allowed study surface movements in Wałbrzych in the post mining period, for which no other, conventional surveys were available. In the analysis radar images acquired by the ENVISAT satellite for the 458 track and for the 2002 – 2009 period have been used. The results of PSInSAR data processing indicate elevation of the surface within the boundaries of former mining areas, reaching up to +6 mm/yr and on average +4 mm/yr. We assume that the end of mine water drainage and restoration of Carboniferous ground water table is the main factor responsible for this process and observe delayed response of the rock mass.