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V.C.R法是垂直深孔球形药包爆破后退式采矿法的简称。该方法的主要特点是:整个采场高度用潜孔钻机,按合理的孔网,从采场顶部凿岩硐室向下部水平拉底空间钻凿垂直或倾斜深孔(一般孔径为φ150～φ165毫米,普遍采用φ165毫米),然后采用高密度、高威力、高爆速、低感度的炸药,以球形药包(药包长度为直径的6倍以内),自下而上进行单分层或多分层爆破,并采用高效率的出矿设备(如铲运机),将爆下的矿石通
V.C.R method is a vertical deep hole spherical packet blasting retractable mining method for short. The main features of the method are as follows: The downhole drilling rig is used to drill the vertical or inclined deep holes (usually with a hole diameter of φ150 ~ φ165) from the top of the stope to the bottom of the bottom level according to a reasonable hole network. Mm, commonly used φ165 mm), and then use high-density, high-power, high detonation velocity, low sensitivity explosives to spherical kits (kits length less than 6 times the diameter), bottom-up single stratification or more Stratified blasting, and the use of efficient mining equipment (such as scrapers), will blast the ore through