Abstract: To explore the evolution law of overburden strata during the mining of huge thick coal seams, an experimental study on the distribution characteristics of the overburden three zones with large mining height was carried out. Based on the geological conditions and mining methods of the huge thick coal seam, a two-dimensional physical similarity simulation experiment under the condition of huge thick coal seam was carried out. The results showed that the height of the overburden strata of the huge thick coal seam in Liuhuanggou（9-15） 06 working face was 60 m. The horizontal fracture density of the overburden strata in the gob was distributed as a parabola as the propulsion distance increased. Affected by the distribution of strata in the “horizontal three zones”, Delamination of goaf was characterized by “high on both sides and low in the middle”. By calculating physical quantities such as mining overburden subsidence, fissure density, and layer separation and other physical quantities, the formula for determining the height of overburden “three zones” under huge thick coal seams was derived.