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第五钨鑛第三坑在未推廣直線式龜裂法爆破以前,單位引線消耗量高達一百多公尺,这雖然和掘進能力有着重要的关系,但和點火方法也是分不開的。因每面炮眼數有17—23個,假設用電石灯點火或引線點火,如導火線不長一些的話,就很容易出問題。自去年第五号窿發生人身事故後,為了避免此類事故的重演,便將全坑每根引線長自1.65公尺加到2公尺,但这样做不僅增高了成本,而且不一定有保証安全的把握,因此鑛領導指出,必須学習苏联的先進經驗,使用
Before the third pit of the fifth tungsten ore mine did not popularize the straight-line cracking method, unit lead consumption was as high as over 100 meters. Although it has an important relationship with the tunneling capability, it is inseparable from the ignition method. Due to the number of holes per side there are 17-23, assuming the use of electric stone light ignition or lead ignition, such as the fuse is not longer, it is easy to go wrong. Since last year’s personal accident at the fifth hole, in order to avoid the recurrence of such accidents, the total pit per lead will be increased from 1.65 meters to 2 meters. However, this not only increases the cost but also does not necessarily guarantee safety The leaders of the mines therefore pointed out that they must learn from the advanced experience of the Soviet Union and use it