瞬变电磁法在复杂条件下勘查地下岩溶水效果分析——以贵州大方县鼠场为例

The Effect and Analysis of TEM Exploration of Underground Karst Water under Complex Conditions——Taking Shuchang in Dafang County of Guizhou Province as an Example

针对喀斯特地域复杂地质-地貌条件以及严重的人文干扰,着重讨论了瞬变电磁法在复杂条件下勘查地下岩溶水的野外工作方法和数据处理、解释方法,同时以贵州大方县鼠场岩溶示范勘查区为例,对实测数据进行处理解释,清晰查明勘查区的储水体与各种岩溶管道的空间分布基本形态,取得了良好的找水地质效果,既佐证了工作方法选择的有效性,又为在喀斯特地域复杂条件下开展小线框、大电流重叠回线装置的瞬变电磁法工作提供了例证。

In this paper,according to complex geological and geomorphological conditions in Karst region,it discussed the work method and technology of field data acquisition,data processing and interpretation.Meanwhile,transient electromagnetic method is used to explore underground karst water under complex conditions.Taking Shuchang karst demonstration of exploration field in Dafang county of Guizhou as an example,this paper has undertaken the measured data processing and interpretation,and clearly identified the basic spatial distribution pattern of the water storage body and various karst pipelines in exploration area.Furthermore,this paper also has achieved a good geological effect of finding water,and it proved the effectiveness of working methods selection.And it also provided the example for transient electromagnetic method using small coils,large current and overlap loop device under complex conditions in karst areas.