Surface subsidence in coal mines is caused by the movement of overlying strata when coal seams are mined. The size of the space created by this movement directly affects the amount of subsidence. By studying the development of these separated strata, researchers can predict and control surface subsidence. They analyzed the process of strata separation and established a model to understand the relationship between surface subsidence and strata movement. Through experiments, they found a pattern in the development of separated strata, providing a new method to prevent mining subsidence damage.