地面磁梯度测量在勘查地下污水管道中的应用

利用在辽宁某地区实测的垂直磁梯度数据,采用欧拉反褶积方法对地下异常情况进行处理和解释。正演研究表明,理论计算获得的磁梯度比实测磁总场的灵敏度高,结合磁梯度数据和欧拉反演方法可以进行较为复杂地形的解释。通过将计算获得的磁梯度异常与实测磁梯度异常对比,后者对地质体的分辨率更高。对地面垂直磁梯度数据进行反演,结果表明:该方法能够准确地确定地下污水管道的边界和埋深。

Application of ground magnetic gradient in underground sewage pipe survey

On the basis of vertical magnetic gradient data in Liaoning，the underground anomalies were pro- cessed and interpreted by using Euler deconvolution inversion method． The forward research proves that the magnet- ic gradient calculated by the total field has a higher sensitivity than the measured magnetic anomaly． Combined with magnetic gradient and Euler method，the authors interpret some complicated structures． By the contrast of calculat- ed gradient anomaly and measured vertical magnetic gradient anomaly，the latter is higher in resolution． With the ground magnetic gradient inversion，the results indicate that this method can exactly determine the boundary and depth of underground sewage pipe．