煤田地质与勘探Issue(2)：80-84,5.DOI:10.3969/j.issn.1001-1986.2014.02.017
大定源瞬变电磁法激励场及边框效应研究
The research on the primary field and rim effect of transient electromagnetic method with large fixed loop
摘要
Abstract
Through the calculation of the primary field of transient electromagnetic method with the large fixed loop, the distribution and delay features of the primary field of different offset and different loop size were analyzed. The results of the research demonstrate that the early primary field was greater than that in the center within certain depth range, the more the offset within certain range is, the more the primary field and the more depth rate from ground to this depth are. Over this depth, the primary field of the center is the largest, when the offset is increased to some extent, the delay features of the different offset are different;rim effect has great influence on signals of shallow layer and the big length-width ratio rectangular loop. Finally, the study in the area where the target has the same depth and the error of primary field is no more than 5%solved the problem of how to delineate effective exploration area.关键词
瞬变电磁法/大定源回线/边框效应/激励场Key words
transient electromagnetic methods/large fixed loop/rim effect/stimulatied electromagnetic field分类
天文与地球科学引用本文复制引用
包乃利,刘鸿福,余传涛..大定源瞬变电磁法激励场及边框效应研究[J].煤田地质与勘探,2014,(2):80-84,5.基金项目
国家高技术研究发展计划(863计划)项目(2011AA050102) （863计划）
