Spatial-temporal evolution of surface deformation in grouting mining area by SMD-InSAR monitoring-analysis method

doi:10.11947/j.AGCS.2020.20190430

Abstract

Abstract: At present, the monitoring research of synthetic aperture radar differential interferometry (D-InSAR) in mining areas is mostly limited to taking surface movement as the object. Field measurement is usually needed to obtain other displacement deformation factors of the surface. In view of this deficiency, SMD model was constructed to map the regional surface movement and deformation(SMD). Here are the value scan besolved by SMD:①the inclination, curvature in arbitrary direction, the maximum value of inclination, curvature and its directions; ②horizontal movement and deformation of the surface in any direction in horizontal or near-horizontal coal mining, the maximum value of horizontal movement, horizontal deformation and its directions in horizontal or near-horizontal coal mining. The SMD model maps the inclination and curvature of the ground surface according to the directional derivative principle on the basis of the vertical deformation map. The horizontal movement and deformation of the surface are calculated according to the prior law of mining subsidence. The simulation experiment shows that the model can obtain the surface movement and deformation with high accuracy.SMD model combined with time-series InSAR technology was used to analyze the spatial-temporal evolution process of surface deformation and the subsidence and deformation reduction effect of grouting mining in Huaibei. The analysis showed that the grouting activity could effectively control the surface deformation. The relationship between the average grouting volume, the advancing distance of the working face and the maximum subsidence rate can be described by the multivariate linear regression model.SMD model can be used to analyze the comprehensive situation of regional surface deformation and provide a strong basis for the evaluation of the impact of mining subsidence regionally on construction.

Key words: ground movement and deformation, interferometric synthetic aperture radar, time-series, grouting mining, mining subsidence, monitoring model

CLC Number:

P237

YAO Shuyi, ZHANG Yanhai, YANG Keming, SHI Xiaoyu, WANG Jian. Spatial-temporal evolution of surface deformation in grouting mining area by SMD-InSAR monitoring-analysis method[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(7): 893-906.

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