By constructing the numerical simulation of the fault in coal seam, using accurate and fast linear ray tracing method, the arrival time of sound wave is forwards calculated, and the image is reconstructed by BPT and ART inversion methods. 在该系统下,建立煤层断层数值模型,利用精确和快速的直射线追踪方法,正演计算声波到时,通过BPT,ART反演方法重建图像。