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大冶铁矿露天采场,由于开采水平下降,岩层涌水量愈来愈严重,而防水炸药不能满足当前生产需要,给生产带来了很大困难。自从去年7月以来,为解决这一困难,我们采用聚氯乙稀塑料做成圆柱形的袋子,把粉状硝铵炸药装在袋内代替防水炸药使用,获得了一定的效果。现将其方法介绍如下: (一)加工方法:采用长800毫米,宽460毫米的矩形塑料布做成高430～440毫米,直径200～210毫米的圆柱形袋子。然后把二号岩石硝铵粉药去掉原有包装纸,装进塑料袋内,每袋净重10公斤。由于硝铵比重较轻,为了装药时易于下沉,采用了配重方法。药包封口除用沥青沾住外,还用细绳捆上。为了避免装药时与孔壁发生碰撞而
Daye iron ore open pit, due to the decline in mining levels, rock discharge more serious, and waterproof explosives can not meet the current production needs, has brought great difficulties to production. Since July last year, in order to solve this problem, we have used polyvinyl chloride (PVC) plastic to make a cylindrical bag, and put the powdered ammonium nitrate explosive in the bag instead of the waterproof explosive to obtain a certain effect. Now the method is described as follows: (a) processing methods: the use of 800 mm long, 460 mm wide rectangular plastic cloth made of 430 ~ 440 mm high, diameter 200 ~ 210 mm cylindrical bag. Then No. 2 rock ammonium nitrate powder to remove the original wrapping paper, put into plastic bags, net weight 10 kg. As the proportion of ammonium nitrate lighter, easy to sink in the charge, using the weight method. In addition to medicine package sealed with asphalt, but also tied with a string. In order to avoid collision with the hole wall when charging