Analyzing the Error Pattern of InSAR-Based Mining Subsidence Estimation Caused by Neglecting Horizontal Movements

It is common to estimate underground mining-induced subsidence from interferometric synthetic aperture radar (InSAR) displacement observations by Neglecting hOrizontal moVements (NOV). Such a strategy would cause large errors in the NOV-estimated subsidence. This issue was proven and theoretical equation of resulting has been deduced before. However, systematic analysis error pattern (e.g., spatial distribution) its relationship between some critical influence factors lithology overlying rock strata) lacking date. To circumvent this, method first presented assess mining this study. Then, were discussed. The results suggest that spatially follow “peak-to-valley” shape, with an absolute “peak-to-valley angle” 5–15°. In addition, for same geometry, magnitudes under hard strata are smaller than those soft lithology, vice versa. These be beneficial guide scientific use NOV understanding deformation mechanism controlling geohazards associated other similar anthropogenic activities.