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《Journal of Jilin University(Earth Science Edition)》 2010-06
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Numerical Simulations of Borehole Radar for Metal Ore Detection

LIU Si-xin1,ZHOU Jun-feng1,WU Jun-jun1,ZENG Zhao-fa1,WAN Hong-xiang21.College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China2.Jilin Jien Nickel Industry Co.Ltd.,Panshi,Jilin 132311,China  
In order to investigate the response of borehole radar to metal ore,finite difference time domain(FDTD)was applied to borehole radar forward modeling on metal ore detection.Numerous simulated results were obtained for different metal ore-body,such as spherical,planar,and a practical ore-body.Spherical ore-body exhibits hyperbolic curves in profile and exact position can be determined after migration processing.As the planar ore-body is penetrated by the borehole,direct wave is shifted and weakened,andreflection events extend upward and downward.However,when it is not penetrated by the borehole,reflection exhibits a linear characteristic.For the practical ore-body,different boreholes show different signal characters.Combing with the detection from three boreholes,we can deduce the shape of the ore-body,and judge that the ore-body has the characteristic of low-resistivity and high permittivity.
【Fund】: 国家“863”计划项目(2008AA06Z103);; 国家自然科学基金项目(40874043)
【CateGory Index】: P631.325
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