高压线下瞬变电磁多匝小线框重叠回线装置的改进与应用  

Improvement and Application of TEM Multi-turn Flyer Frame Overlapping Loop Installation under High-voltage Power Lines

作　　者：刘镜竹 罗国平[1] Liu Jingzhu;Luo Guoping(Geophysical Prospecting Research Institute,CNACG,Zhuozhou,Hebei 072750)

机构地区：[1]中国煤炭地质总局地球物理勘探研究院,河北涿州072750

出　　处：《中国煤炭地质》2021年第6期78-83,共6页Coal Geology of China

摘　　要：地面瞬变电磁勘探在煤矿水害预测防治中应用十分广泛,为了压制高压线干扰,减少其对地面瞬变电磁法勘探成果的影响,探索改进多匝小线框重叠回线装置,并在远离高压线区域采集高信噪比数据,对高压线下的含水异常进行解释。对比偏移倾斜测量与正常水平测量的多测道曲线与视电阻率拟断面图,认为偏移倾斜测量的解释结果可靠。在此基础上研究了偏移倾斜测量反演电阻率偏移归位、与正常水平测量数据融合处理技术。成果表明,采用单独处理、综合解释可以很大程度上减少高压线干扰的影响,完善高压线下含水异常的解释结果。The surface TEM prospecting has been widely applied in coalmine water hazard prediction and control.To suppress interference and reduce impact from high-voltage power lines on surface TEM prospecting results,the multi-turn flyer frame overlapping loop installation has been explored and improved,and acquired high SNR data away from high-voltage power lines,interpretations have been carried out for water-bearing anomaly under high-voltage power lines.After comparison between multi-channel plots and apparent resistivity pseudo-sections from offset dip survey and normal level survey has considered that the interpreted results from offset dip survey are reliable.On this basis has studied offset dip survey inversion resistivity offset migration and normal level survey data fusion processing techniques The results have shown that through separated processing and integrated interpretation can reduce impact from high-voltage power line interference to a large extent,improve water-bearing anomaly interpretation results under high-voltage power lines.

关 键 词：地面瞬变电磁 多匝小线框 重叠回线 高压线 偏移倾斜测量 

分 类 号：P641.3[天文地球—地质矿产勘探]