基于DInSAR技术的矿区累计时序形变监测研究

Study on cumulative time series deformation monitoring in mining area based on DInSAR technology

随着测量技术的发展,矿区形变监测手段日益丰富。传统方法主要是通过监测矿区地表有限个点的位移变化来推测整个矿区的形变情况,其分辨率较低,无法真实反映矿区形变规律,也无法识别沉陷边界。基于此,提取西部某矿区某工作面2018年7月12日至2019年4月16日的完整地表形变场,采用差分合成孔径雷达(DInSAR)技术,对矿区进行累计时序形变监测,结果表明,对于矿区小尺度形变区域,采用DInSAR技术可以较好地识别地表沉陷量并可以提取沉陷盆地边界,但是在大尺度形变区域由于失相干而无法解算出真实形变。

With the development of modern survey technology,more and more means are employed for monitoring deformation in mining area.The traditional methods are focused on measurement of varying displacement of limited points on mine surface so as to speculate the deformation throughout the mining area.Because of its low resolution ratio,it is unable to truly reflect the deformation law of the mining area and identify the subsidence boundary.Therefore,the complete surface deformation field was extracted from a working face of a western mining area from 12th July 2018 to 16th April 2019,using differential synthetic aperture radar(DInSAR)technology,the survey of cumulative time series deformation of the mining area was completed.The results show that DInSAR technology in the small-scale deformation area can be applied to better identify the surface subsidence volume and extract the boundary of the subsidence basin,but the real deformation in the large-scale deformation area is not able to be calculated due to its decoherence effect.