华北型煤田水文地质电法勘探的深度问题  

Issues on probing depth of hydrogeological electrical magnetic method for exploration of North China coal field

作　　者：闫述[1] 石显新[2] 陈明生[2] 

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013 [2]煤炭科学研究总院西安分院,陕西西安710054

出　　处：《煤炭科学技术》2006年第12期5-8,共4页Coal Science and Technology

基　　金：国家自然科学基金资助项目(40374052);江苏大学高级专业人才科研启动基金资助项目(05JDG054)

摘　　要：直流电阻率、瞬变电磁场和可控源音频大地电磁测深是煤田水文地质勘探常用的方法。针对华北型煤田地层电性特点,通过电磁探测原理分析与勘察实例,说明了在此类地区需要更大的极距、更长的观测时间和更低的频率才能达到预期的探测深度。为在华北型煤田水文地质勘探中取得更好的探测效果,采用综合电磁探测方法是必要的。A direct current resistance rate, transient electric magnetic field and controllable power audio frequency ground electric magnetic depth probing are the conventional methods for the hydro - geological exploration. According to the electric features of North China type coal field, the principle analysis and exploration cases of the electric magnetic probing showed that a largest pole distance, longer observation time and lower frequency would be needed to reach the expected probing depth. In order to have better probing results from the hydrogeological exploration in North China coal field, it is necessary to have a comprehensive electric magnetic probing method.

关 键 词：直流电阻率法 瞬变电磁场法 可控源音频大地电磁测深 华北型煤田 探测深度 

分 类 号：P631.322[天文地球—地质矿产勘探]