【摘要】 用时间域有限差分 ( FDTD)法建立矿井地质雷达的模型。采用理想频散关系和超吸收边界条件 ,对几个典型矿井地电模型进行了正演模拟 ,研究了矿井地质雷达超前探测的剖面特征。巷道对各道直达波能量分布及波列形状有明显影响 ;煤岩分界面主要影响反射波能量分布。更多还原

【Abstract】 Use called finite difference time domain method(FDTD) a forward modeling for drift ground penetrating radar(GPR) is established by explicit second order finite difference approximation.Using ideal stability conditions and super absorbing boundary conditions,some typical models in drift are simulated to investigate the characteristic of drift GPR pulled ahead profile.The shape and energy distribution of direct wave is mainly influenced by drift,while the energy distribution of reflected wave is influenced mainly by the interface between coal and rock.更多还原