This work investigated the effect of particle breakage on the pore structure of compacts formed with the discrete element method. The watershed segmentation method was developed to quantify pore properties of the compacts. Results showed the pore size, throat diameter and throat length followed the log-normal distributions for all the compacts except for compacts in which significant particle breakage occurred. With particle breakage, the mean pore size and mean throat diameter decreased exponentially with reducing particle size. The pore structure was also explored through spontaneous interparticle percolation. Results showed that the residence time of the percolating particles followed the log-normal distributions. The coefficient of the radial dispersion increased linearly with depth for all compacts except for a compact with particle breakage. The relations between pore structure and percolation behaviour were established. With decreasing pore size and throat diameter, the mean residence time increased exponentially but the dispersion coefficient had a linear decrease.

这项工作研究了颗粒破碎对离散元法形成的压块孔隙结构的影响。开发了分水岭分割方法来量化压块的孔隙特性。结果表明，所有压块的孔径、喉道直径和喉道长度均服从对数正态分布，但出现明显颗粒破碎的压块除外。随着颗粒破碎，平均孔径和平均喉径随着颗粒尺寸的减小呈指数下降。孔隙结构也通过自发的颗粒间渗透进行了探索。结果表明，渗滤颗粒的停留时间服从对数正态分布。对于所有压块，径向色散系数随深度线性增加，但有颗粒破碎的压块除外。建立了孔隙结构与渗流行为的关系。随着孔径和喉径的减小，平均停留时间呈指数增长，但分散系数呈线性下降。