Subjected to the complex and variable underground mining disturbance environment, pillars play an essential role in supporting the overlying strata and maintaining the stope stability, demonstrating diverse mechanical response characteristics. In order to elucidate the mechanical behavior and development process of the mining-induced pillar disaster evolution, FLAC3D was employed to simulate the extraction activities of a central pillar within the pre-defined mining area of a certain mine in East China, and a corresponding load-bearing numerical model of the mining-induced pillars was developed. By virtue of incorporating the quantitative calculation of evaluation indicators, such as the displacement vector angle, the integral safety factor and the stress information entropy, the variation and distribution characteristics of stress and displacement within the pillar during mining were analyzed. Simultaneously, the migration disaster mechanism associated with the progressive failure of the central pillar was revealed, and the damage accumulation and stability degradation process of the pillar resulting from adjacent chamber disturbance were evaluated. Research indicates that: i) As mining advances, the weakly confined zones located at both ends of approximately 12.5% and 62.5% of the pillar height above the pillar base progressively migrate towards the goafs, ultimately leading to global instability of the pillar;
Yuan et al. (Mon,) studied this question.