The full use of underground space is recognized as a necessary means to improve the accessibility of residents and change the spatial distribution of urban population. The dividends generated by the metro operation will increase as the increases in the number of residents attracted to the zone. However, when the number of residents within the zone exceeds a certain threshold, travel accessibility may be reduced by exceeding the optimal service capacity of the metro, which leads to a decline in the per capita dividend. This paper uses the zone-based trip time reliability (TTR) to represent travel accessibility, and describes the interaction between the zone-based TTR and regional resident mobility. A generalized boosted method based Rubin causal model with longitudinal data was adopted to investigate the impacts of the improvement of zone-based TTR by metro operation on regional resident mobility. Then, an approximate BPR function was established to represent the feedback impact of regional resident mobility on zone-based TTR. Five typical areas considering population, average age, income level and land value are proposed to recognize the resident spatial re-segmentation rule. The results show that the metro operation has a significant impact on the regional resident mobility. And the improvement of zone-based TTR by metro operation is more attractive for resident relocation in Mixed and Stable areas than in Vibrant and Siphonic areas under the similar location distance. This paper intends to indicate the trade-off between zone-based trip time reliability (TTR) and regional resident mobility, and provide a reference for the development and utilization of urban underground space.

充分利用地下空间被认为是提高居民可达性、改变城市人口空间分布的必要手段。地铁运营产生的红利将随着吸引到该区域的居民数量的增加而增加。但当区域内居民人数超过一定阈值时，可能会因超出地铁最优服务能力而降低出行可达性，从而导致人均红利下降。本文使用基于区域的出行时间可靠性（TTR）来表示出行可达性，并描述了基于区域的TTR与区域居民流动性之间的相互作用。采用基于纵向数据的鲁宾因果模型的广义提升方法，研究地铁运营改善区域 TTR 对区域居民流动性的影响。然后，建立了一个近似的 BPR 函数来表示区域居民流动对基于区域的 TTR 的反馈影响。提出了五个考虑人口、平均年龄、收入水平和土地价值的典型区域来识别居民空间再分割规则。结果表明，地铁运营对区域居民流动性具有显着影响。在相近的区位距离下，地铁运营对分区TTR的改善对混合区和稳定区的居民搬迁比活力区和虹吸区更有吸引力。