在槽井探工程中为逐步实现用炸药爆破来代替人力挖掘,根据国内有关资料,四月中旬,我队在奈林沟矿区开始试制油铵炸药,先后在黄土层中进行40多次试验爆破,在小平 In the tank well exploration project for the progressive realization of explosives instead of using human explosives to dig, according to domestic relevant information, in mid-April, our team inNailingou mining trial oil and ammonium explosives, has carried out in the loess layer of more than 40 test blasting In Xiaoping