目前,在各种地面建筑物和天然地物下面的保安矿柱中积压着大量矿石。直接开采在表土和风化层下面的急倾斜矿体对地表和周围都有不良影响。用崩落法开采厚矿体会形成占地面积很大的陷落区(崩落漏斗)。不能经营利用的土地,不仅包括崩落漏斗区, At present, a large amount of ore is backlogged in security pillars under various ground structures and natural features. Steeply sloped mines directly mined on the topsoil and in the weathered layer have a negative effect on the surface and around. The mining of thick ore bodies by caving method leads to the formation of large subsidence area (collapse funnel). Can not operate the use of land, including not only the collapse of funnel area,