Improving Boundary Constraint of Probability Integral Method in SBAS-InSAR for Deformation Monitoring in Mining Areas

Abstract

Coal-mining subsidence causes ground fissures and destroys surface structures, which may lead to severe casualties and economic losses. Time series interferometric synthetic aperture radar (TS-InSAR) plays an important role in surface deformation detection and monitoring without the restriction of weather and sunlight conditions. In addition, the probability integral method (PIM) is a surface movement model that is widely used in the field of mining subsidence. In recent years, the integration of TS-InSAR and the PIM has been extensively studied. In this paper, we propose a new method to estimate mining subsidence with the PIM based on TS-InSAR results. This study focuses on the improvement of a boundary constraint and dynamic parameter estimation in the PIM through the inversion of the line-of-sight (LOS) time series deformation derived by TS-InSAR. In addition, 45 Sentinel-1A images from 17 June 2015 to 27 December 2017 of a coal mine in Jiaozuo are utilized to acquire the surface displacement. We apply a time series deformation analysis using small baseline subsets (SBAS) and place the results into an improved PIM to estimate the mining parameters. The simulated mining subsidence is highly consistent with the leveling data, exhibiting an RMSE of 0.0025 m. Compared with the conventional method, the proposed method is more accurate in discovering displacement in mining areas. In the final section of this paper, some sources of error that affect the experiment are discussed.

Study of Ground Movement in a Mining Area with Geological Faults Using FDM Analysis and a Stacking InSAR Method

“…In this study, FLAC 3D was adopted for numerically predicting ground movement caused due by coal mining. FLAC 3D is a 3-D finite-difference computer program to solve geological problems (Kumar et al, 2016;Shi M et al, 2021). In FLAC 3D , the initial model is the geomechanical model with the engineering scale, which is able to simulate the real geological condition in the mining coalfield.…”

“…Extensive research has been carried out to study ground movement induced by underground mining activities (Park et al, 2012;Yang et al, 2019). In recent years, several research tools, such as numerical analysis (Deck and Anirudh 2010; Shabanimashcool and Li 2012;Shi M et al, 2021) and InSAR time-series analysis (Sowter et al, 2016;Gee et al, 2017;Grebby et al, 2019;Ghayournajarkar and Fukushima 2020) have been widely employed to analyse the mechanism of ground movement. Furthermore, several studies have also focused on ground movement associated with fault activation.…”

A Lightweight Anchor-Free Subsidence Basin Detection Model With Adaptive Sample Assignment in Interferometric Synthetic Aperture Radar Interferogram

“…Traditional geodetic surveying methods mainly include precise leveling, total station measurement, and global navigation satellite system (GNSS) (Fan et al, 2018). These methods have some limitations such as low spatial resolution, limited monitoring area, and low observation efficiency (Chen et al, 2015;Shi M. Y. et al, 2021). Interferometric synthetic aperture radar (InSAR) technology has become a new means for monitoring the surface deformation in mining areas with the advantages of day/night data acquisition, all-weather imaging capability, and strong penetrability (Ng et al, 2017;Chen B. Q. et al, 2020;Wang et al, 2020).…”

A Method of Backfill Mining Crossing the Interchange Bridge and Application of a Ground Subsidence Prediction Model

“…Towards the extent that solid backfill can be used to control ground subsidence, some scholars have conducted systematic analyses of the equivalent mining diameter theory of strata movement in backfill mining, developed a structural mechanics model of strata movement in high-density backfill mining, and performed continuous medium mechanics analysis [6][7][8]. It is proposed that when the probability integral approach is employed to predict ground sinking regarding dense filling, the traditional ground subsidence prediction specifications will be adjusted [9,10].…”

“…On the one hand, it is concerned with analyzing the mechanical mechanisms behind the behavior of mining rock masses through the examination of overburden failure, deformation, and movement laws, and then with analyzing surface deformation and failure [25][26][27]. On the other hand, it has created significant achievements in both theoretical and practical investigations, which concentrate on the mathematical analysis and assessment of the mining rock mass's behavior, beginning with research into the surface curvature and failure laws and progressing to the analysis of the overlaying rock's distortion and breakdown [10,23,[28][29][30]. The strata stabilization theory is determined by the relationship between overburden deformation and failure and the ground on the ground, which differs from the relationship observed in traditional mining [18,[31][32][33].…”