The study looked at how coal seams behave when repeatedly mined, focusing on stress and rock movement. They used simulations to see how the stress field changed over time. The first mining created a caving arch that protected the rock mass. As mining continued, the arch failed periodically. Repeated mining caused upper coal seams to collapse and connect with the goaf, transferring load downward. This relieved the weight on the mining area. The findings can help with safe mining practices in similar conditions.