| CSAMT相位校正及其在煤矿采空积水区探测中的应用 |
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| 引用本文： | 苏超,侯彦威,王程,李丹.CSAMT相位校正及其在煤矿采空积水区探测中的应用[J].煤田地质与勘探,2019,47(6):180-186. |
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| 作者姓名： | 苏超 侯彦威 王程 李丹 |
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| 基金项目： | 国家重点研发计划项目（2017YFC0804105）；国家自然科学基金项目（41374150） |
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| 摘 要： | 可控源音频大地电磁法（CSAMT）磁场数据易受电磁干扰，且会导致相位数据质量严重下降。采用参考邻近测点高质量的相位数据，并结合最小二乘拟合及插值的方法，对受影响的相位数据进行校正。经正演模拟处理分析发现:三次多项式插值效果较好，不但能够更准确地还原相位曲线的变化特征，而且将校正后的相位数据参与到反演计算中，使反演结果更加准确、可靠。将该方法应用于山西某矿采空积水区探测，探测结果较为准确地反映了已知采空积水区的范围。
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| 关 键 词： | 可控源音频大地电磁法 相位校正 最小二乘拟合 三次多项式插值 采空积水区 |
| 收稿时间： | 2019-05-13 |
CSAMT phase correction and its application in detection of water-accumulating area of goaf in coal mine |
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| Abstract: | Magnetic field data of controlled source audio magnetotelluric method(CSAMT) is vulnerable to electromagnetic interference, and will lead to serious degradation of phase data quality. The affected phase data are corrected by referring to the high quality phase data of adjacent measuring points and combining the least squares fitting and interpolation method. Through forward simulation analysis, it is found that cubic polynomial interpolation is effective, not only can restore the variation characteristics of phase curve more accurately, but also involve the corrected phase data in the inversion calculation, so that the inversion results are more accurate and reliable. The method is applied to the detection of water-accumulating area of goaf in a coal mine in Shanxi Province. The detection results accurately reflect the scope of the known wa-ter-accumulating area of goaf. |
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