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垂直深孔球形药包后退式采矿法(简称VCR法)建立在使用球形药包的基础上。这种球形药包和目前在凿岩爆破作业中更为常用的柱状药包不同。如果药包的长度和直径之比不超过六比一的话,那么这种药包便可看作是球形药包。把这些球形药包放进垂直或倾斜炮孔的一定位置上,使得它们处在距采场顶板或任何类型坑道顶板的水平面最适当的距离。当球形药包起爆的时候,便在围岩或其它物料中形成爆破漏斗。因为重力做功和炸药的破碎作用以及
The vertical deep hole spherical kits retractable mining method (VCR method) is based on the use of spherical kits. This spherical pack is different from the more common column packs currently used in rock blasting operations. If the length and diameter of the packet does not exceed the ratio of six to one, then the kits can be seen as a spherical kits. Place these spheres into vertical or inclined bore holes so that they are at the most appropriate distance from the level of the stope roof or any type of tunnel roof. When the spherical kits detonate, blasting funnels are formed in the surrounding rock or other materials. Because of the gravity work and explosive crushing effect as well