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地下矿山大直径深孔崩矿法(VCR法)是用自行式潜孔钻机钻凿直径为165毫米左右的深孔,装填柱状药包或球状药包进行漏斗爆破垂直后退式采矿。其特点是:采切工程量少,矿石破碎均匀,大块率低,效率高,成本低。被认为是当前最安全的高效率采矿方法。应用大直径深孔崩矿法的关键是在采场钻凿下向平行炮孔,深度为50～100米,偏斜率小于1％。 DQ150J潜孔钻机是为了使有条件的矿山应用大直径深孔崩矿法采矿而研制的。还适用于天井掘进,国防硐室和水库工程的凿岩。1983年12月由中
Underground mining large diameter deep hole collapse method (VCR method) is the use of self-drilling machine DTH drill diameter of about 165 mm deep hole, filled with cylindrical kits or spherical kits for vertical drilling back-funnel mining. Its features are: cutting less engineering, ore crushing uniform, low bulk rate, high efficiency, low cost. Is considered to be the safest and most efficient mining method currently available. The key to the application of the large-diameter deep-hole collapse method is to drill down parallel holes at a depth of 50 to 100 meters with a skewness of less than 1%. DQ150J DTH drilling rig is to make the conditions of the mine application of large-diameter deep-hole collapse mining developed. Also suitable for tunnel boring, defense chambers and reservoir engineering drilling. December 1983 by the middle