基于探地雷达波速层析的金属矿区勘探仿真  

Modeling and simulation on metallic mine exploration based on GPR tomography

作　　者：杨峰[1] 杜翠[1] 梁胤程 徐昕军 

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《地球物理学进展》2014年第3期1332-1336,共5页Progress in Geophysics

基　　金：十二五科技支撑计划项目(2011BAK06B01-06;2011BAD04B05);国家重大科学仪器设备开发专项(2012YQ030126)联合资助

摘　　要：探地雷达技术在金属矿区得到广泛应用.由于金属矿区地质构造复杂,使用于探测层状介质的反射波探地雷达勘探方法在金属矿探查中受到限制.为提高接收信号能量强度以提高探测结果分辨率,实现探测复杂地质构造及隐伏岩体,将层析成像方法用于探地雷达对金属矿区的勘查中.建立了典型的金属矿区速度模型,并选取了代表性的切片,采用LSQR算法反演计算.仿真结果误差都在1‰的数量级,证明了雷达层析成像技术应用于金属矿区勘察的有效性.Metallic mine is important mine resource,and our country has an increasing need for metallic mine. GPR technology using reflected wave,mainly used in detection of layers of medium,is restricted in exploration of metallic mine with complex geology structure. Adopting computerized tomography in GPR detection of concealed intrusive bodies and structures in metallic mine has great significance for increasing received signal intensity to improve resolution of detection result. Representative models having complex subsurface structures were devised. One was used for simulating multilayered media and the other for simulating Complex velocity structure.LSQR algorithm was employed to resolve inversion equations,then inversion result and models were compared.This comparison and error analysis was performed by combination of the whole model and typical sections.All inversions were characterized by fast and stable convergence.It was also observed that correlation exists between model structure and inversion error.Longitudinal resolution was better than lateral resolution and steeply dipping formation was an interference factor to inversion results.We considered the GPR tomography technology to be an effective geological measuring method in metallic mine exploration.

关 键 词：探地雷达 层析成像 金属矿 反演 LSQR 

分 类 号：P631[天文地球—地质矿产勘探]