Extremely close coal seams in China are often mined from above, causing the overlying rock to shift and stress to concentrate on the pillars. By using physical models and field observations, researchers found that the main roof starts to collapse at 37.5 meters and collapses periodically every 12.5 meters. When mining the lower seam, the pressure is high but collapses are less frequent. The lower seam collapses before the upper one, with maximum support pressure and roof fall at the coal pillar. This study helps improve safety and efficiency in mining extremely close coal seams.