加拿大Frood-stobic矿于1964年11月创造了地下爆破新的世界纪录。该矿在回采305米中段以上的老窿和残柱时,用464吨炸药崩落3,750,000吨矿石(单位炸药消耗量为0.124公斤/吨)。在爆破前经过了一年多的设计与准备工作,由于制订了周密的采准和钻孔计划,因而没有影响正常生产。这次爆破所产生的地震小于一般露天矿爆破。 Canadian Frood-stobic mine in November 1964 created a new world record of underground blasting. The mine crashed 3,750,000 tons of ore with 464 tons of explosives (unit explosive consumption was 0.124 kg / tonne) at the time of mining old holes and residual columns above the mid-305 meters. After more than a year of design and preparation prior to blasting, normal production was not affected by the well-established approval and drilling program. The blast caused by the earthquake is less than the average open pit blasting.