Satellite observation of coal mining subsidence by persistent scatterer analysis

Application of DInSAR in Mine Surface Subsidence Monitoring and Prediction

“…Comparison with ground survey data indicated that the DInSAR analysis could give reliable estimation of the subsidence in an urban environment. By comparing the performance of different bands, L-band SAR images have shown great capabilities in rural and vegetated areas 14,30 . After detailed review of the literature, persistent or permanent scatterer interferometry (PSInSAR or PSI) techniques and approaches [46][47][48][49][50][51][52][53] seem to be more promising, as they give estimates on point targets.…”

“…The main design parameters that influence the feasibility and accuracy of PSInSAR are the number of acquisitions (images; N), the temporal baseline (B T ) and spatial/perpendicular baseline (B  ). The PSI technique was useful for the measurement of ground subsidence in abandoned coal mining areas, even in mountainous regions 14 . The crack levels collected during field survey for the study area located in Gaeun, Korea, when compared with SAR measurements showed good agreement, and despite the low density of persistent scatterers, it was possible to construct a two-dimensional subsidence map 14 .…”

“…The PSI technique was useful for the measurement of ground subsidence in abandoned coal mining areas, even in mountainous regions 14 . The crack levels collected during field survey for the study area located in Gaeun, Korea, when compared with SAR measurements showed good agreement, and despite the low density of persistent scatterers, it was possible to construct a two-dimensional subsidence map 14 . An advantage of high-resolution X-band PSI is its capability to generate dense PS sampling.…”

“…L-band SAR satellites, JERS-1 and ALOS PALSAR ( -23.5 cm) has shown great potential in monitoring subsidence 13,14,16,22,24,26,30,33,45 . Subsidence monitoring at Fengfeng coal mining area in China was performed by Guang et al 16 using multi-band SAR data.…”

“…Many PSI approaches have been developed over the years; their description is beyond the scope of this article. Examples of PSInSAR application in the field of mine surface 14,15,25,26,28,30,34,35,38 and urban [54][55][56][57][58][59][60][61][62][63][64] subsidence have shown the large spectrum of this technique on ground deformation assessment. About 21 TerraSAR X-band ( -3.1 cm) images have been used by Liu et al 28 to extract subsidence hazard map (SHM) around Xishan coal mine in China, that suffered from subsidence related to underground mining activities.…”