An approach to study the mechanism of mining-induced subsidence, using a combination phase-stacking and sub-pixel offset-tracking methods, is reported. In this method, land subsidence with small deformation gradient was calculated time-series differential interferometric synthetic aperture radar (D-InSAR) data, whereas areas greater were by method. With approach, data for mining derived in Yulin area 11 TerraSAR-X (TSX) scenes from 13 December 2012 2 April 2013. The maximum velocity values...

Change vector analysis (CVA) has been widely used in change detection of multitemporal multispectral images, whereas the use a spectral angle mapper (SAM) is always ignored. CVA and SAM describe difference from perspective magnitude direction, respectively. Combining can fully utilize obtain better map. In this context, two strategies have proposed: 1) novel hybrid feature constructed using vector, which utilized CVA, respectively, 2) image generated by autoadapted fusion strategy, fuses...

To determine the relationship between underground mining, groundwater storage change, and surface deformation, we first used two sets of ENVISAT data one set Sentinel-1A to obtain deformation in eastern Xuzhou coalfield based on temporarily coherent point interferometric synthetic aperture radar (TCPInSAR) technique. By comparison with mining activities, it indicated that subsidence is mainly related mine exploitation residual goaf, while uplift restoration level. The average change from...

With the aim of addressing problem accurately monitoring complete deformation fields over mining areas by means Synthetic Aperture Radar (SAR), this paper proposes a solution to obtain using probability integral model fuse data derived from Differential Interferometric SAR (D-InSAR), sub-band InSAR and offset-tracking. This method is used for small-scale, medium-scale large-scale D-InSAR, offset-tracking, respectively. Finally, utilized integrate three fields, field with high-accuracy study...

Land subsidence processes in deep mining areas have long time durations, and land deformation models should be obtained using many field observations. In this paper, the capability of monitoring ALOS PALSAR pairs with short baselines has been investigated area Xuzhou, Jiangsu province. For image poor temporal baselines, it is difficult to correctly generate whole basin, more information lost that rapid changes vegetation. Therefore, an approach combining differential interferometric...

In this paper, a novel change detection approach is proposed using fuzzy c-means (FCM) and Markov random field (MRF). First, the initial map cluster (changed unchanged) membership probability are generated through applying FCM to difference image created by vector analysis (CVA) method. Then, reduce over-smooth results in traditional MRF, spatial attraction model integrated into MRF refine map. The adaptive weight computed based on distances between centre pixel its neighbourhood pixels...

A new method is presented to aid in accurately extracting power lines from airborne LiDAR point clouds, which can automatically extract multiple and reconstruct line 3D space. According the spatial distribution characteristics that power-line closely linked on same line, data points belonging a single are identified. Then, paper employs well-known least squares fitting algorithm estimate series of model parameters order three dimensional Finally, makes accuracy evaluation proposed method....

Underground mining always induces large vertical displacements in the ground surface and, because of subsidence gradient, phase-unwrapping methods interferometric synthetic aperture radar (InSAR) are unable to give accurate results. Pixel tracking based on normalized cross-correlation maximization overcomes limitations imposed by gradient and can be used monitor displacements. This paper introduces analyses each component offset field then describes improved method efficiently remove orbital...

Partial extraction methods such as underground strip pillar mining or room-and-pillar are widely adopted techniques to control ground subsidence. However, failure in partial mines may introduce violent secondary collapses. The stability of dictates the safety surface structures and environmental health state surrounding areas. To reuse subsidence lands, it is necessary evaluate land through mine assessments. This paper summarizes current assessment their limitations, rock mechanics...

Coal mining usually causes drastic large gradient deformation in the earth's surface a short period, which leads to formation of collapse basin or pit. The renders generation dense fringes interferogram, leading difficulties phase unwrapping step. In this paper we propose using intensity tracking technique monitor subsidence center. To obtain small information around and pit, use Small Baseline Subset (SBAS) interferometry deformation, after integrate results under two methods complete...

The collapse of abandoned room-and-pillar mines is often violent and unpredictable. Safety concerns resulted in mine closures with no post-mining stability evaluations. As a result, large amounts land resources over are wasted. This paper attempts to establish an understanding the long-term issues goafs (abandoned mines). Considering progressive pillar failures effect single failure on surrounding pillars, this proposes peeling model evaluate coal associated criteria for evaluating mines....

In order to obtain accurate probability integration method (PIM) parameters for surface movement of multi-panel mining, a genetic algorithm (GA) was used optimize the parameters. As measured is affected by more than one mining panel, traditional PIM parameter inversion model difficult ensure reliability results due complexity rock movement. With crossover, mutation and selection operators, GA can perform global optimization search has high computation efficiency. Compared with pattern...

The speckle noise of synthetic aperture radar (SAR) images limits its application in change detection. Compared with improved ratio (IR) and log-ratio (LR) operators, the neighborhood-based (NR) technique can restrain influence is more suitable for detection SAR images. However, we find three drawbacks NR by analyzing this method carefully. To overcome these defects, propose an (INR) approach INR restructures operator to exploit neighborhood information reasonably expected reduce impact...

This paper proposes an object-based approach to supervised change detection using uncertainty analysis for very high resolution (VHR) images. First, two temporal images are combined into one image by band stacking. Then, on the hand, stacked is segmented statistical region merging (SRM) generate segmentation maps; other classified support vector machine (SVM) produce a pixel-wise map. Finally, objects implemented integrate map and at appropriate scale final Experiments were carried out with...

Multisource synthetic aperture radar (SAR) image registration is a difficult task in remote sensing due to the influence of speckle noise and geometric distortions between images. The SAR scale-invariant feature transform (SAR-SIFT) prior option extract features for automatic However, most methods based on SAR-SIFT operator only use information (the distribution pixels making up feature) do not consider influences side-looking imagery mode topographic relief. In this article, we propose...

The monitoring of large-gradient deformation caused by coal mining is great significance to the prevention and management disasters in areas. interferometric synthetic aperture radar (InSAR) method captures small-gradient ground on edge subsidence basin accurately but unreliable for capturing deformation. intensity-based pixel-tracking (e.g., normalized cross-correlation (NCC) method) can overcome limitations InSAR’s maximum detectable displacement gradient incoherence. However, sensitive...

Change vector analysis (CVA) and Spectral Angle Mapper (SAM) are widely used for change detection in multitemporal multispectral images. CVA SAM describe the difference from perspective of magnitude spectral angle, respectively. It has been proved that three categories may occur a changed pixel; however, or alone can only detect two properly. Hence, we propose novel approach integrating advantages them to acquire better map. This approach, based on discrete wavelet transform (ABDWT, i.e....

Differential synthetic aperture radar interferometry (D-InSAR) is limited when exploited in high-intensity mining areas, because large deformation gradients lie beyond the maximum measurable value of D-InSAR technique which breaks prerequisite for successfully employing method. The SAR amplitude-based pixel-tracking method provides an alternative way to efficiently and robustly extract distribution particularly by loss coherence. In addition, line-of-sight direction along azimuth are also...