Application of PSInSAR for assessment of surface deformations in post_mining area _ case study of the former Walbrzych Hard Coal Basin (SW Poland)

Milczarek, Wojciech

doi:10.13168/agg.2016.0026

Cited by 21 publications

(17 citation statements)

References 26 publications

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“…Numerous approaches can be used to analyze and visualize ground movements in coal mining fields: statistical analysis of PS points [32] or PS points congruent to reference units [33] and also interpolation [34] with the aim of indicating areas of statistically-significant values of upward or downward ground movements with the aid of GIS-based hot spot analysis. The latter was also included in our paper.…”

Section: Resultsmentioning

confidence: 99%

Evolution of Secondary Deformations Captured by Satellite Radar Interferometry: Case Study of an Abandoned Coal Basin in SW Poland

et al. 2019

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The issue of monitoring surface motions in post-mining areas in Europe is important due to the fact that a significant number of post-mining areas lie in highly-urbanized and densely-populated regions. Examples can be found in: Belgium, the Czech Republic, France, Germany, the Netherlands, Spain, the United Kingdom, as well as the subject of this study, the Polish Walbrzych Hard Coal Basin. Studies of abandoned coal fields show that surface deformations in post-mining areas occur even several dozen years after the end of underground coal extraction, posing a threat to new development of these areas. In the case of the Walbrzych area, fragmentary, geodetic measurements indicate activity of the surface in the post-mining period (from 1995 onward). In this work, we aimed at determining the evolution of surface deformations in time during the first 15 years after the end of mining, i.e., the 1995–2010 period using ERS 1/2 and Envisat satellite radar data. Satellite radar data from European Space Agency missions are the only source of information on historical surface movements and provide spatial coverage of the entirety of the coal fields. In addition, we attempted to analyze the relationship of the ground deformations with hydrogeological changes and geological and mining data. Three distinct stages of ground movements were identified in the study. The ground motions (LOS (Line Of Sight)) determined with the PSInSAR (Persistent Scatterer Interferometry) method indicate uplift of the surface of up to +8 mm/a in the first period (until 2002). The extent and rate of this motion was congruent with the process of underground water table restoration in separate water basins associated with three neighboring coal fields. In the second period, after the stabilization of the underground water table, the surface remained active, as indicated by local subsidence (up to −5 mm/a) and uplift (up to +5 mm/a) zones. We hypothesize that this surface activity is the result of ground reaction disturbed by long-term shallow and deep mining. The third stage is characterized by gradual stabilization and decreasing deformations of the surface. The results accentuate the complexity of ground motion processes in post-mining areas, the advantages of the satellite radar technique for historical studies, and provide information for authorities responsible for new development of such areas, e.g., regarding potential flood zones caused by restoration of groundwater table in subsided areas.

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Section: Resultsmentioning

confidence: 99%

Evolution of Secondary Deformations Captured by Satellite Radar Interferometry: Case Study of an Abandoned Coal Basin in SW Poland

et al. 2019

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“…This activity was induced by sharp movement of the fault walls of both strike-slip and normal faults [25]. At the same time, the influence of rock massif collapse was also eliminated [29], as well as the effects of surface deformation of areas linked with former mining activity [30,31] in the neighbouring areas…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Indicators of recent geodynamic activity in the Książ Castle area (Świebodzice Unit, Sudetes) in the light of structural analysis and geodetic measurements

et al. 2018

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Abstract. Indicators of r area are registered by the measuring instruments of the SRC PAS (Space Research Centre of Polish Academy of Sciences) Geodynamic Laboratory tal pendulums (since 1974) and over 10 years of observations from water-tube tiltmeters (since 2002) have documented irregularly repeatable strong signals related to the relative displacement of blocks in the rock substrate, d. These signals have dip (rotational) and vertical strike-slip components. Also, the presence of a horizontal strikeslip component is evidenced by geometric anomalies (deformations) of the the orientation of the main faults in the area. Recent geodynamic activity is documented by destruction of the construction elements in the castle complex. Instrumental indicators of movement, geodetic measurements and structural analysis of the rock massif have allowed for constructing a model showing the main unconformity surfaces in the analysed rock massif. Sinistral, NE SW and ENE WSW-oriented strike-slip faults prevail in the laboratory corridors, along with perpendicular WNW ESE and NW SSE-oriented dextral and normal faults. Most dislocations are accompanied by zones of intense cataclasys, secondary silification, and Fe and Mn mineralization. Generally, the faults were formed due to reactivation of joint fractures cutting the steeply N-and S-dipping (at 75

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“…In case of the Ostrava site, the entire area has experienced gradually decreasing subsidence, and in the case of the Odra mine, stabilization and gentle uplift in the second period (2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010) that was analysed with Envisat data. For the Wałbrzych site, results of a study described in Milczarek et al (2017) complicated geological and mining conditions and unfavourable economic circumstances. Knowledge from other former mining sites suggested that these sites may experience ground motions following the end of mining.…”

Section: Discussionmentioning

confidence: 99%

“…Milczarek et al (2017) applied Envisat data and the PSInSAR technique to determine ground movements in urbanised parts of Wałbrzych for 9/2002 -7/2009 period. The results indicated an uplift of the surface within boundaries of former mining areas of up to 6 mm/year and on average 4 mm/year.…”

Section: Introductionmentioning

confidence: 99%

Application of satellite radar interferometry (PSINSAR) in analysis of secondary surface deformations in mining areas case studies from Czech Republic and Poland

Blachowski¹

2018

Acta Geodynamica Et Geomaterialia

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Secondary deformations are ground movements occurring in areas of ceased underground mining. These are associated with delayed readjustment of rock mass resulting in subsidence, discontinuous deformations (sinks, cracks, etc.) due to destruction of underground, usually shallow, workings, and elevation of ground surface in response of rock mass to rising groundwater levels following the end of mine water drainage. Comparative analysis of secondary deformations in two former mining areas in the first period after cessation of underground hard coal mining is the subject of this study. We used ERS-1/2 and Envisat satellite radar interferometry data processed with PSInSAR technique and GIS to map vertical (in satellite's line of sight, LOS) movements of the surface and analyse them in relation to location of coal fields and underground water table rise. In the study, two areas have been compared, the Ostrava

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Application of PSInSAR for assessment of surface deformations in post_mining area _ case study of the former Walbrzych Hard Coal Basin (SW Poland)

Cited by 21 publications

References 26 publications

Evolution of Secondary Deformations Captured by Satellite Radar Interferometry: Case Study of an Abandoned Coal Basin in SW Poland

Evolution of Secondary Deformations Captured by Satellite Radar Interferometry: Case Study of an Abandoned Coal Basin in SW Poland

Indicators of recent geodynamic activity in the Książ Castle area (Świebodzice Unit, Sudetes) in the light of structural analysis and geodetic measurements

Application of satellite radar interferometry (PSINSAR) in analysis of secondary surface deformations in mining areas case studies from Czech Republic and Poland

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