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在我矿419矿块无底柱分段崩落法中,用YZ—90钻机进行垂直上向扇形中深孔凿岩;用FZY—100型风动装药器,装2~#粉状硝铵炸药进行装药爆破。由于风动装药器有装药密度大的优点,其爆破效果比人工炮棍装药包(2~#硝铵炸药)要好得多,主要表现在大块率低,破碎块度均匀,便于T_4G装矿。但是,风动装药器装2~#粉状硝铵炸药也有严重的缺点:一是劳动条件差。由于风动
In the ore-free block 419 in our mine, the YZ-90 rig is used to vertically drill fan-shaped middle-deep hole rock drilling; the FZY-100 type pneumatic charger is used to install 2 ~ # powdered ammonium nitrate Explosives for explosive charge. Due to the advantages of high loading density of pneumatic chargers, the blasting effect is much better than that of artificial gun charge packs (2 ~ # ammonium nitrate explosives), which is mainly manifested in low bulk, uniform fragmentation, T_4G loading ore. However, the pneumatic charge 2 ~ # powdered ammonium nitrate explosives also have serious shortcomings: First, poor working conditions. Because of the wind