天然电磁场激励下球体的天然电场选频法异常成因分析

发布时间：2018-03-19 08:19

本文选题：选频法　切入点：球体　出处：《湖南科技大学学报(自然科学版)》2016年02期 　论文类型：期刊论文

【摘要】：在以往实践应用的基础上,主要从均匀半空间内球体模型的角度研究天然电场选频法异常的成因.首先从自然因素和人文因素2方面分析天然电场选频法的场源问题;从麦克斯韦方程组出发,利用边界条件求取谐变磁场作用下,均匀半空内导电导磁球体在地表主剖面上感应二次电场的解析计算式;根据拉普拉斯方程和边界条件,获得谐变电场作用下,均匀半空间导电球体在地表主剖面上的异常电场水平分量计算式;对理论模型的各个参数进行假定,计算三维谐变磁场、谐变电场作用下,地表主剖面上良导球体的水平电场异常曲线.通过对模拟计算结果分析可知,在水平谐变磁场和谐变电场共同作用下,获得的地表电场异常曲线与野外实测结果形态相似、特征相同.
[Abstract]:Based on the previous practice, the causes of natural electric field frequency selection method mainly from abnormal sphere uniform half space model perspective. Field source problem first from natural and human factors analysis of 2 aspects of natural electric field frequency selection method; starting from the Maxwell equations, the boundary conditions for harmonic magnetic field calculation. The air in the analytic uniform conductive and magnetic sphere on the surface of the main section of the two induction electric field; according to Laplasse equations and boundary conditions, obtain the harmonic electric field, uniform half space conductive sphere abnormal electric field horizontal component on the surface of the main section of the formula; parameters of the theoretical model are assumed to calculate the 3D harmonic variable magnetic field harmonic electric field, the horizontal electric field anomaly curve surface on the main section of conducting sphere. Based on the simulation result analysis shows that the magnetic field of harmony in the level of harmonic Under the joint action of variable electric field, the surface electric field anomaly curves obtained are similar to the field measured results, and the characteristics are the same.

【作者单位】：湖南科技大学土木工程学院;湖南科技大学页岩气资源利用湖南省重点实验室;湖南科技大学先进矿山装备教育部工程研究中心;
【基金】：国家自然科学基金资助项目(41274126) 湖南省自然科学基金资助项目(12JJ6035)
【分类号】：P631.3

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