瞬变电磁法及EH-4在钼矿采空区探测中的应用  

Application of transient electromagnetic method and EH-4 to investigation of mined-out areas of molybdenum deposits

作　　者：戴前伟[1,2] 侯智超[2] 柴新朝[3] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,地球科学与信息物理学院,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083 [3]河南省煤田地质局物探测量队,郑州450009

出　　处：《地球物理学进展》2013年第3期1541-1546,共6页Progress in Geophysics

摘　　要：地下采空区的存在严重威胁着人们正常的生产生活,选取有效的方法对采空区探测有着重大的现实意义.本文探讨了瞬变电磁法和EH-4电导率成像法的方法技术以及在某钼矿采空区的应用效果.瞬变电磁法观测的是纯二次场,所以分辨率高,特别是对低阻异常体反应灵敏.EH-4电导率成像系统探测深度大,适用于各种复杂地形,可以有效的减少地形的影响,因此结合这两种方法对采空区进行综合探测,可以相互补充,提高对采空区评价的准确性.The exist of underground mine＆out areas seriously threaten human production and life, so it has a real meaning to explored the mine＆out areas by effective measures. The paper introduces the application of Transient electromagnetic method（TEM） and EH-4 to the exploration of the mined-out areas. Because TEM measures the secondary field signal, it has high resolution, especially in low resistivity bodies. EH 4, which possesses very strong adoptability for the site and lager detecting depth, is reducing topographic influence efficiently, combing the two techniques, we can make comprehensive exploration to mined-out areas, therefore, the combination of these two methods to detect the mined-out area, we can complement each other to improve the accuracy.

关 键 词：瞬变电磁法 EH-4 采空区 

分 类 号：P631[天文地球—地质矿产勘探]