强干扰区电磁法勘探抗干扰措施及效果分析  

THE ANTI-INTERFERENCE MEASURES WITH ELECTROMAGNETIC METHOD IN NOISY AREA STRONG LEVEL AND THE ANALYSIS OF EFFECT

作　　者：武军杰[1] 邓晓红[1] 张杰[1] 王兴春[1] 杨毅[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《物探化探计算技术》2013年第1期40-46,4-5,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家危机矿山接替资源勘查专项(200699066)

摘　　要：电磁法勘探在老矿山深部及外围找矿中面临强而广的电磁干扰,通过大量野外试验,针对不同电磁方法给出了不同的抗干扰措施及其应用效果。经试验结果表明:①瞬变电磁法宜采用大功率、多叠加、多次重复观测、逐点噪声监测的数据采集方式;②CSAMT方法宜采用大功率仪器,大发射电流,使用多级工频陷波器,多重复观测、逐点噪声监测的数据采集方式;③在矿区开展AMT方法,建议使用多级工频陷波器,如果矿区噪声较强,则不建议布置AMT工作。Electromagnetic method exploration faces strong and extensive electromagnetic interference.The anti-interference measures of different method and effect is introduced in this paper based on a large number of field test.The field test result show that it is suitable for TEM method to take the data collection method of high-power,multiple stack number,multiple repeated observation and noise monitoring.It is reasonable for CSAMT method to take large current,multiple notch filter,multiple repeated observation and noise monitoring data collection method.The multiple notch filter is suggested in AMT exploration,but AMT method is not suggested in strong noisy level area.

关 键 词：电磁法 强干扰区 抗干扰 

分 类 号：P631.325[天文地球—地质矿产勘探]