强场源TEM测量仪器和在大型矿山接替资源勘探中的应用研究  

APPLICATION OF STRONG SOURCE TRANSIENT ELECTRO- MAGNETIC MEASUREMENT SYTEM TO THE EXPLORATION OF SUBSTITUTED RESOURCE OF LARGE MINE

作　　者：嵇艳鞠[1] 林君[1] 于生宝[1] 朱凯光[1] 王忠[1] 王静[1] 

机构地区：[1]吉林大学智能仪器与测控技术研究所,长春130026

出　　处：《地震地质》2005年第1期115-122,共8页Seismology and Geology

基　　金：国家自然科学基金(40074045);国家科技攻关计划项目(2001BA609A0611)共同资助

摘　　要：　针对矿山噪声强、要求勘探深度大的特点,应用强场源TEM测量仪器,采用双发射信号同步叠加增大发射磁矩,即通过增大发射电流和合理选择发射回线边长,提高瞬变信号晚延时的信噪比的方式提高有效勘探深度。在安徽铜陵凤凰山铜矿的实际勘探中,采用吉林大学研制的 2个ATEM-Ⅱ型发射机同时工作,将发射电流由 2. 4A增大到 38 .5A,晚延时瞬变信号的信噪比由 0 .275提高到2. 93,有效探测深度达到 650m以上,表明强场源TEM测量仪器在寻找大型矿山接替资源勘探方面具有较好的发展前景。To counter the strong noise in the mine and to meet the requirement of great exploration depth, the strong source Transient Electro-magnetic (TEM) system is applied to the exploration of substituted resource of crisis-ridden large mine. The system adopts double signal synchronous stacking method to enhance the transmitted magnetic moment. In other words, it enhance the signal-noise ratio and enlarge the exploration depth by increasing transmitted current and using reasonable transmitter coil length. In practical exploration of the Fenghuangshan copper mine, Anhui Province, the two transmitters of the ATEM-Ⅱ system made by Jilin University were synchronously operated, increasing the transmitted current from 2.4A to 38.5A, and enhancing the SNR of late time transient signal from 0.275 to 2.93. In this way, the effective exploration depth may reach up to 650m. The results show that the strong source TEM system opens up broad prospects for the exploration of the substituted resources for large mine.

关 键 词：强场 场源 磁矩 边长 TEM 发射电流 吉林大学 勘探深度 资源勘探 探测深度 

分 类 号：P631[天文地球—地质矿产勘探] O431[天文地球—地质学]