岩土力学2011，Vol.32Issue(5)：1583-1588,6.
点状不良地质体钻孔雷达响应特征的形状效应正演分析
Borehole radar response characteristics of point unfavorable geo-bodies——Forward simulation on its geometric effect
摘要
Abstract
Borehole radar can probe deep underground geoenvironment through arranging a dipole antenna in a borehole.and it is a good logging tool to obtain the electncal signals of geologic formation.According to the common point unfavorable geo-bodies in borehole radar exploration such as cavitics, karst caves and buried objects etc., the electrical response of the tool to point unfavorable geo-bodies of different geometry and buried depth is investigated The application conditions and resolution response capabilities of the simulation models are analyzed.It reaches that: the proper antenna frequency should be chosen according to the physical dimension of object-of-interest and resolution requirement of the exploration task; and that the radar cross section of geo-bodies with different geometry appears various characteristic.The resolution capacity of boreholc radar antenna varies with the buried depth of geo-bodies; and the borehole radar with higher frequency antenna can obtain reflected signals of higher resolution.However, the reflected signals detected by the borehole radar with a higher ffequency will attenuate faster than one with lower frequency antenna.The results provide visualized perceptual knowledge and abundant interpretation support for borehole radar using in geologic survey and potential disaster dctection, and help to improve the accuracy of geological interpretation.关键词
钻孔地质雷达/FDTD/形状效应/点状不良地质体分类
信息技术与安全科学引用本文复制引用
钟声,王川婴,吴立新,吴育华,王清远..点状不良地质体钻孔雷达响应特征的形状效应正演分析[J].岩土力学,2011,32(5):1583-1588,6.基金项目
科技部973课题(No.2011CB707102) （No.2011CB707102）
教育部创新团队项目(No.IRT0640). （No.IRT0640）
