在进行天井扩帮形成切割槽的过程中,药包必须克服矿房回采期内存在的岩体自然夹制作用,因为切割工作几乎是顺序进行的,切割时崩矿层的宽度小于回采崩矿层的宽度,而回采空间暂且还是最小的。用普通法开切割槽时,很大一部分爆破能扩散在矿柱中,从而会使有巷道的矿柱边界层变形。 In the process of expanding the pavement to form the cutting slot, the kits must overcome the natural clamping of the rock mass existing during the mining back-mining period because the cutting work is performed in almost sequential order. The width of the chipping layer during cutting is smaller than that of the recovery collapsible layer Width, while the mining space for the time being still the smallest. When a common cut is used to cut the groove, a significant portion of the blasting can diffuse into the pillars, deforming the pillar pillars with the roadway.