Abstract: Based on numerical simulation technology, we investigate the rational optimization scheme for 4^-2 coal compound roof inter-face coal pillars in the Shenfu mining area.With increasing mining depth, ground pressure issues have become increasingly severe, making roof stability a critical factor in coal mine safety production.Through analysis of the geological conditions, coal seam mining methods, and ground pressure patterns in the Shenfu mining area, this paper examines the effect of coal pillar width on roof stability, mine pressure control, and support structures.Research indicates that traditional coal pillar width designs often result in resource waste and are unfavorable for roof stability, while optimized coal pillar designs can improve mining efficiency and effectively reduce resource waste.The paper provides detailed analysis of how different coal pillar width configurations affect the movement patterns of overlying strata, particularly the pillar's influence on stress states and strain variations in the overburden.Through numerical simulation of the “three vertical zones” and “three horizontal zones” after mining activity, this study investigates the relationship between coal pillar width, mine pressure, and roof stability, revealing the different widths of pillar's influence on roof strata evolution trends.Based on this analysis, the paper proposes that rational design of inter-face coal pillar width in the Shenfu mining area and similar mining districts can significantly improve mining safety and extraction efficiency.