Abstract:Mineral resources are very rich in Zichuan district. Associated ore and coexisted minerals are also very rich. The combination of mineral resources is very good. The reserves of coal, refractory, purple, clay, bauxite, limestone, iron ore, quartz are large and widely distributed. The square of urface mined-out collapse caused by the long-term exploitation of mineral resources is about 60km2, which will endange people's lives and property and cause farmland damage. In this paper, present condition and development trend of mined-out collapse have been analyzed, and relative countermeasures are put foward as well.