|
|||||
|
|
| 基于随机分布的断裂破碎带GPR剖面特征分析 | |
| 引用本文： | 胡绕,吴健生,赵永辉.基于随机分布的断裂破碎带GPR剖面特征分析[J].物探与化探,2006,30(6):551-553,561. |
| 作者姓名： | 胡绕 吴健生 赵永辉 |
| 作者单位： | 1. 上海岩土工程勘察设计研究院有限公司,上海,200002;同济大学,海洋与地球科学学院,上海,200092 2. 同济大学,海洋与地球科学学院,上海,200092 |
| 摘 要： | 为了验证探地雷达在查找基岩中断裂破碎带的有效性、以及进一步认识破碎带在探地雷达反射剖面上的表现特征,结合概率论和数理统计知识,通过设置断裂破碎带中介质的介电常数在一定空间范围内随机分布,建立了更为贴合实际的断裂破碎带模型,使用时域有限差分方法正演模拟其二维GPR反射剖面,较好地揭示了断裂破碎带的GPR剖面特征。通过对不同破碎程度和基岩具有不同介电常数的破碎带模型进行正演模拟,分析其正演GPR剖面的图像差异,较为深入地认识了断裂破碎带在GPR剖面上反映出的特征。最后,进一步引入工程实例,发现通过正演模拟揭示的断裂破碎带GPR 剖面特征在断裂破碎带的实际探测剖面上也是存在的,说明通过正演模拟来指导实际资料的解释是现实可靠的。 |
| 关 键 词： | 探地雷达 断裂破碎带 正演模拟 时域有限差分 |
| 文章编号： | 1000-8918（2006）06-0551-03 |
| 收稿时间： | 2006-04-28 |
| 修稿时间： | 2006-04-28 |
CHARACTERISTIC ANALYSIS OF THE GPR PROFILE OF THE FRACTURED ZONE BASED ON RANDOM DISTRIBUTION |
|
| HU Rao,WU Jian-sheng,ZHAO Yong-hui.CHARACTERISTIC ANALYSIS OF THE GPR PROFILE OF THE FRACTURED ZONE BASED ON RANDOM DISTRIBUTION[J].Geophysical and Geochemical Exploration,2006,30(6):551-553,561. | |
| Authors: | HU Rao WU Jian-sheng ZHAO Yong-hui |
| Institution: | 1. Shanghai Geotechnical Investigation &; Design Institute Co., Ltd., Shanghai 200002, China; 2. School of Ocean &; Earth Science, Tongji University, Shanghai 200092, China |
| Abstract: | In order to verify the validity of ground-probing radar in search for the fractured zone of bedrock and identify characteristics of its GPR profile,the authors built a fairly good fault zone model by assuming the dielectric constant of the fractured zone which is distributed randomly in a certain spatial range.Using finite-difference time-domain(FDTD) simulation method,the authors obtained the two-dimensional GPR forward profile of the fracture broken belt that can better reveal its features on the GPR profiles.Through simulating different fractured zone models with different crushing degrees or different bedrock dielectric constants,the authors are fully acquainted with their characteristics on GPR profiles.A practical example shows that characteristics of the fractured zone revealed in forward simulation also exist in the practical GPR detection profile.It can thus be concluded that the forward simulation is a practical and reliable means in providing supports for the interpretation of practical GPR profiles. |
| Keywords: | ground penetrating radar fractured zone forward simulation finite-difference time-domain random distribution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《物探与化探》浏览原始摘要信息 | |
| 点击此处可从《物探与化探》下载免费的PDF全文 | |