根据采场上覆岩层移动理论,将采空区沿工作面推进方向分为自由堆积区和承压堆积区,推导建立了采空区空隙率分布模型。该模型在自由堆积区和承压堆积区内分别连续可导,且在两区分界处连续。该数学特性将有利于保证采空区渗流模型求解的稳定性。 According to the stratum overlying strata movement theory, the mined-out area along the advancing direction of working face is divided into free accumulating area and confined pressure accumulating area, and the voidage distribution model of gob area is deduced. The model can be continuously and separately guided in the free accumulation area and the confined pressure accumulation area, and is continuous at the boundary between the two areas. The mathematical properties will help to ensure the stability of the seepage model of goaf.