A new simulation model (WD2G9 model) for shock wave created by Mined-out Area roof caving based on lattice-boltzmann was put forward. In this simulation model, the process of the Mined-out Area roof caving is abstract to the process that the piston with total gravity promoting, Combined with D2Q9 model and D2G9 model, this paper discretes the compression shock wave created by the piston promoting in the discretiza⁃tion grids as the lattice-boltzmann model does, and wave as the time evolutes. In process of the simulation, we can visually watch the process of shock wave waving and the process of the air particle evolution, observe the change of the air viscosity and the press, this method provides a new way for the Mined-out Area roof caving pre⁃diction and prevention.%提出了基于格子Boltzmann的地下采空区顶板冒落的仿真模型（WD2G9模型）。将采空区顶板冒落的过程抽象为全重力活塞推进过程，结合D2Q9模型和D2G9模型将活塞推进所产生的压缩冲击波，在格子Boltzmann的离散网格上同样进行离散，随着时间的演化进行波动。在仿真过程中可以可视地观看冲击波的波动以及空气粒子的演化过程，观测空气速度、压力的变化情况。该方法为采空区顶板冒落灾害的预测和预防提供了新的途径。
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