铁矿采空区的地球物理探测  

Geophysical prospecting to underground iron ore dugged-cave

作　　者：周楠楠[1] 薛国强[1] 陈卫营[2] 闫述[3] 赵长胜 张松 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]桂林理工大学,桂林541004 [3]江苏大学计算机科学与通信工程学院,镇江212013 [4]大庆石油公司钻井分公司,大庆163412

出　　处：《地球物理学进展》2011年第2期669-674,共6页Progress in Geophysics

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-Q04-07)资助

摘　　要：由于铁矿采空区围岩导电,给采空区的有效识别造成一定的困难.本文根据瞬变电磁的电磁场理论和磁法勘探原理,对铁矿采空区的综合地球物理特征进行研究,结合测区内铁矿采空区的特点,给出铁矿采空区的评判原则,认为充水后的铁矿采空区的瞬变电磁响应会表现为低电阻值特性,同时,磁异常特性会表现为高磁背景下的相对低磁响应.使用V8电法仪对河北遵化地区的承唐铁路沿线区域铁矿采空区进行瞬变电磁的地球物理探测工作,并结合高精度磁法探测结果,划分出铁矿采空区位置,解释成果与后来查证的实际地质资料完全吻合.It is difficult to distinguish the mined-out space for the conductance of mined-out spacers wall rock. Following the principle of transient electromagnetic and magnetic exploration, we can study comprehensive geophysical feature of mined-out space and carify the rating principle with factual condition in survey area. Then, it＇s concluded that the response of TEM （transient electromagnetic method） would be low-resistivity and the character of magnetic relative low-magnetism. TEM was carried out along the Cheng-tang railway on the iron ore mined-out space in Zunhua, with high-accuracy magnetic survey. Simultaneously, location and character of the iron ore mined-out space is verified from the areal geological information and relevant borehole inspection.

关 键 词：铁矿采空区 低阻异常 瞬变电磁法 磁法 

分 类 号：P631[天文地球—地质矿产勘探]