房柱法的主要标志,是在开采有用矿物的同时,在矿区要形成采空区。地质力学系统(矿柱—覆盖岩层)在空洞超出规定的条件下,尤其会引起极为复杂的矿山工艺结构。当空洞长期存在时,岩石强度会降低,这样导致房间矿柱破坏,顶板岩石以及分布于各个水平的分割空洞的桥状顶柱冒落。整个覆盖层冒通地表的情况也时有所见。 The main symbol of the Housing and Pillar Act is the exploitation of useful minerals at the same time, to form a mined-out area in the mining area. Geomechanics systems (pillars - overburden strata) can cause extremely complex minework structures, especially when cavities exceed specified limits. When the void exists for a long period of time, the strength of the rock decreases, resulting in the destruction of the pillars in the room, the roof rock and the plinth overhead pillars scattered at various levels. From time to time, the whole overburden has been seen from time to time.