中文摘要：

为了能够识别顶板中的隐藏离层信息，从而为预防顶板事故的发生提供判断依据，运用GprMax地质雷达（GPR）模拟软件对顶板中的离层进行二维正演模拟，并研究顶板离层的地质雷达图像特征。基于时域有限差分（FDTD）原理，建立了不同频率、不同离层厚度、不同介电常数和不同离层深度的四类几何模型并进行正演模拟。最后通过对这四类模拟结果的图像特征进行分析，证明地质雷达正演模拟方法用于顶板离层检测是可行的。

英文摘要：

In order to identify the hidden separated bedding information in the roof and to provide the judgment basis to prevent the roof accidence occurred, the simulation software of the GprMax geological radar was applied to the 2D forward simulation on the separated bedding in the roof. The geological radar image features of the roof separated bedding were studied. Base on the principle of the time domain finite difference, four geometric models with different frequency, different separated bedding thickness, different dielectric constant and different separated bedding depth were established and the forward simulation was conducted. Finally the image features of the four simulation results were analyzed. The forward simulation method of the geological radar approved would be feasible applied to the detection of the roof bedding.