采矿与安全工程学报2017，Vol.34Issue(2)：317-322,6.DOI:10.13545/j.cnki.jmse.2017.02.017
地质雷达探测顶板离层的数值与物理模拟研究
Numerical and physical simulation of the detection of roof separation with ground penetrating radar
摘要
Abstract
A three-layer medium model was constructed according to the structure characteristics of roof separation. The relationship between the propagation attenuation characteristics of electromagnetic wave and the relative permittivity constant of overlying strata was observed through simulation, and the influences of relative permittivity constant difference on the detection effect by ground penetrating ra-dar(GPR) was thus studied. Then, the propagation of the 2D electromagnetic wave in the free space of different media was made through forward modeling with GPRmax software based on the time-domain finite-difference method. After separation detection on four kinds of overlying strata with different properties, it was obtained that the detection effect was more optimal as there was a bigger difference in the relative permittivity constant between the roof separation and surrounding rocks. Finally, a physical situation experiment was carried out with GPR system of the Seeker SPR 500EX, the experimental re-sult obtained was further analyzed with data analysis software of ReflexW2D, and favorable detection target was achieved.关键词
地质雷达/顶板离层/相对介电常数/传播特征/数值与物理模拟Key words
ground penetrating radar/roof separation/relative permittivity constant/propagation characteristics/numerical and physical simulations分类
矿业与冶金引用本文复制引用
谢建林,许家林..地质雷达探测顶板离层的数值与物理模拟研究[J].采矿与安全工程学报,2017,34(2):317-322,6.基金项目
国家自然科学基金项目(51204160) （51204160）
"十二五"国家科技支撑计划项目(2012BAK04B06) （2012BAK04B06）
江苏高校优势学科建设工程项目(SZBF2011-6-B35) （SZBF2011-6-B35）
