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Janol爆破成巷法是瑞典基鲁纳铁矿首创的一种掘进方法,其特点是从已有巷道朝预定方位钻凿平行炮孔,仅在孔底一定长度上装药爆破,形成另一条与它平行的巷道,剩余的未爆破炮孔以后可用来回来落矿。近年来,西德和苏联也相继采用了这一方法并有新的发展,现将有关情况简介如下。(一)苏联赫鲁斯塔念矿治公司该公司在中央矿山34号矿带的切割拉底工作中试用这一方法,效果甚佳。矿体厚度3～10米,倾角80～85°。矿体赋存在砂岩中,矿石为浸染状与细脉状石英、锡石与硫化物。矿岩普氏硬度系数10～12。
Janol blasting into the alley method is the first of a kind of tunneling method in Sweden’s Kiruna Iron Mine, which is characterized by drilling from the existing roadway to a predetermined orientation parallel to the blasthole, only a certain length at the bottom of the hole charge blasting to form another It is parallel to the roadway, the remaining unexploded blast hole can be used later come back to mine. In recent years, West Germany and the Soviet Union have adopted this method one after another and have new developments. The relevant briefings are as follows. (A) the Soviet Union Juru Luosita mining company The company in the Central Mine 34 ore strip cutting bottoming try this method, the effect is very good. Ore thickness of 3 to 10 meters, dip 80 ~ 85 °. Ore deposits occur in sandstone, the ore is disseminated and fine vein quartz, cassiterite and sulfide. Plains hardness of ore rock 10 ~ 12.