TEM Topographic Correction in Coal Field Electrical Exploration
详细信息
- 责任者：Fan Tao (Xi’an Research Institute ; China Coal Technology & Engineering Group Corp ; Xi’an 710077 ; China)
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：36(2)
- 关键词：煤田勘探 ; coal exploration ; 瞬变电磁法 ; transient electromagnetic methods ; 地形改正 ; topographic correction
- 页码：p.246-249
- 图表：5 illus., 1 table, 10 refs.
- 分类号：1600
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
摘要
Due to the relatively shallow burial of the coal seam,TEM detection in the coal field is influenced considerably by the topography.Using the commonly used depth calculation formula in the coal field,the authors calculated the influence extent of topographic variation on induced electromotive force and on attenuation time separately.Then,the two influencing factors substituted for parameters so as to recalculate the apparent resistivity.According to the new apparent resistivity calculation depth,a set of practical topographic correction methods for the coal measure strata could be obtained.
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