摘要
为了研究工业输电线对瞬变电磁探测效果产生的影响,建立了工业输电线模型并结合均匀半空间模型,研究了瞬变电磁二次磁场的变化率和输电线在竖直方向上磁场变化率之间的定量关系,确定了发射框半径、信噪比与距工业输电线水平距离的关系.研究表明:工业输电线的干扰在地面上是呈正弦变化的,其幅值的大小与电流强度、输电线高度和距工业输电线的水平距离有关.并据此提出了消除工业输电线干扰的方法,研究结果对在工业输电线附近进行瞬变电磁工作具有指导意义.
Aiming at the impact of industrial power lines on transient electromagnetic survey effect,this thesis makes an analysis on the quantitative relationship between the changing rate of transient electromagnetic＇s second magnetic field and that of the power lines＇ s magnetic field in the vertical direction to confirm the relationship among transmitting loop semidiameter,signal-to-noise ratio,horizontal distance from the industrial power lines through the established industrial power line model and uniform half-space model.Research shows that：industrial power lines interference tends to be a sinusoidal variation on the ground,whose amplitude is related to the intensity of electric current,the height of industrial power lines and horizontal distance between lines and the measuring wireframe.Naturally,the research comes to a method of eliminating the interference,which offers some tips to the transient electromagnetic detection in the neighborhood of industrial power lines.
出处
《地球物理学进展》
CSCD
北大核心
2014年第3期1399-1405,共7页
Progress in Geophysics
关键词
瞬变电磁
磁场变化率
工业输电线
干扰范围
干扰的消除
transient electromagnetic
the changing rate of magnetic field
industrial power lines
the range of interference
the elimination of interference
