Combining SAR interferometric phase and intensity information for monitoring of large gradient deformation in coal mining area

Chen, Bingqian; Deng, Kazhong; Fan, Hongqi; Yu, Yang

doi:10.5721/eujrs20154839

Cited by 31 publications

(14 citation statements)

References 33 publications

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“…The detection of precursors of mine-subsidence-induced micro seismicity are of great interest to the research community: Acoustic emission techniques [144][145][146], infrared thermography [151], laser scanning [152] and the SAR (synthetic aperture radar) techniques [153][154][155][156][157][158] have been utilized to study the precursors of rock failure. SAR techniques, in particular, may have the most potential to assess the performance of partial extraction mines, because they can provide accurate, cumulative regional displacements of ground surface.…”

Section: Discussion Of Improving Stability Assessment Methodsmentioning

confidence: 99%

Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review

Chen

Deng

et al. 2018

Sustainability

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Abstract:Partial extraction methods such as underground strip pillar mining or room-and-pillar mining are widely adopted techniques to control ground subsidence. However, pillar failure in partial extraction mines may introduce violent secondary ground collapses. The stability of partial extraction mines dictates the safety of ground surface structures and the environmental health state of the surrounding mining areas. To reuse mining subsidence lands, it is necessary to evaluate the stability of the land through mine subsidence assessments. This paper summarizes current pillar stability assessment methods and their limitations, and the rock mechanics associated with the stability of abandoned mines. The effects of multiple factors that affect mine stability are discussed in detail; special attention has been extended to discuss the weathering effects associated with infused water and spontaneous combustion, as these are some key reasons for pillar strength degradation in abandoned mines. The mechanism of mine collapse and the corresponding post-mining disasters are also summarized. Finally, suggestions and strategies to improve current mine stability assessment methods are proposed based on the perspective of subsidence control.

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Section: Discussion Of Improving Stability Assessment Methodsmentioning

confidence: 99%

Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review

Chen

Deng

et al. 2018

Sustainability

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“…SAR interferometric techniques are applied to monitor mining activities [54,55]. This includes active mining but also the effects of already sealed underground mines on above-ground settlements.…”

Section: Anthropospherementioning

confidence: 99%

Ten Years of Experience with Scientific TerraSAR-X Data Utilization

Roth

Marschalk

Winkler³

et al. 2018

Remote Sensing

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This paper presents the first comprehensive review on the scientific utilization of earth observation data provided by the German TerraSAR-X mission. It considers the different application fields and technical capabilities to identify the key applications and the preferred technical capabilities of this high-resolution SAR satellite system from a scientific point of view. The TerraSAR-X mission is conducted in a close cooperation with industry. Over the past decade, scientists have gained access to data through a proposal submission and evaluation process. For this review, we have considered 1636 data utilization proposals and analyzed 2850 publications. In general, TerraSAR-X data is used in a wide range of geoscientific research areas comprising anthroposphere, biosphere, cryosphere, geosphere, and hydrosphere. Methodological and technical research is a cross-cutting issue that supports all geoscientific fields. Most of the proposals address research questions concerning the geosphere, whereas the majority of the publications focused on research regarding “methods and techniques”. All geoscientific fields involve systematic observations for the establishment of time series in support of monitoring activities. High-resolution SAR data are mainly used for the determination and investigation of surface movements, where SAR interferometry in its different variants is the predominant technology. However, feature tracking techniques also benefit from the high spatial resolution. Researchers make use of polarimetric SAR capabilities, although they are not a key feature of the TerraSAR-X system. The StripMap mode with three meter spatial resolution is the preferred SAR imaging mode, accounting for 60 percent of all scientific data acquisitions. The Spotlight modes with the highest spatial resolution of less than one meter are requested by only approximately 30 percent of the newly acquired TerraSAR-X data.

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“…In 2013, Zhao et al [50] applied the OT procedure to generate the cumulative LOS deformation in the Bulianta and Shangwan coal mining areas of the Shendong coalfield from PALSAR-1 images. Following this, Chen et al [51] and Fan et al [52] both combined the OT procedure and the small baseline subset (SBAS)-InSAR procedure to retrieve the time-series LOS deformation in the Daliuta coal mining area (marked by the purple circle in Figure 1) of the Shendong coalfield from high resolution TerraSAR-X data. However, only 1-D surface LOS deformation, rather than the full 3-D displacement, was detected in these studies, which significantly hampers the accurate assessment of the mining-induced hazards and mining-related damage to infrastructure [33].…”

Section: Study Area and Sar Datamentioning

confidence: 99%

Retrieving 3-D Large Displacements of Mining Areas from a Single Amplitude Pair of SAR Using Offset Tracking

et al. 2017

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Due to the side-looking imaging geometry of the current synthetic aperture radar (SAR) sensors, only ground deformation along the radar's line-of-sight (LOS) and azimuth directions can be potentially obtained from a single amplitude pair (SAP) of SAR using offset tracking (OT) procedures. This significantly hinders the accurate assessment of mining-related hazards and better understanding of the mining subsidence mechanism. In this paper, we propose a method for completely retrieving three-dimensional (3-D) mining-induced displacements with OT-derived observations of LOS deformation from a single amplitude pair of SAR (referred to as OT-SAP hereinafter). The OT-SAP method first constructs two extra constraints at each pixel of the mining area based on the proportional relationship between the horizontal motion of the mining area and the gradients of the vertical subsidence in the east and north directions. The full 3-D mining-induced displacements are then solved by coupling the two constructed extra constraints with the OT-derived observations of the LOS deformation. The Daliuta coal mining area in China was selected to test the proposed OT-SAP method. The results show that the maximum 3-D displacements of this mining area were about 4.3 m, 1.1 m, and 1.3 m in the vertical, east, and north directions, respectively, from 21 November 2012 to 6 February 2013. The accuracies of the retrieved displacements in the vertical and horizontal directions are about 0.201 m and 0.214 m, respectively, which are much smaller than the mining-induced displacements in this mining area and can satisfy the basic requirements of mining deformation monitoring.

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Combining SAR interferometric phase and intensity information for monitoring of large gradient deformation in coal mining area

Cited by 31 publications

References 33 publications

Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review

Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review

Ten Years of Experience with Scientific TerraSAR-X Data Utilization

Retrieving 3-D Large Displacements of Mining Areas from a Single Amplitude Pair of SAR Using Offset Tracking

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