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东北区各鑛除少数单位外,在采鑛时经常产生很多超过允许尺度的大块,尤其是在脈幅较宽的鑛山里,过多的大块给生产带来了很大困难。为了处理大快就不得不增加人工和炸药消耗,因比造成成本高的不良后果。大块过多容易堵塞漏斗,也降低了放鑛强度,甚至还影响出鑛任劳的完成。产生大快的主要原因有以下三个方面:一,对鑛石的物理机械性质和鑛床的局部地质特征缺乏认真的研究和掌握。因此就给炮眼设计造成了困难。目前各鑛仅是在采鑛出了大块时,才手忙脚乱地用缩眼距和增加火药量的方法作为主要措施,对
With the exception of a few units in the northeastern region, there are often many large blocks exceeding the allowable size for mining, especially in the relatively wide-mined mines. Too large blocks cause great difficulties in production. In order to deal with the rapid have to increase labor and explosives consumption, due to cost than the adverse consequences. Too much chunky plug funnel, but also reduce the ore strength, and even affect the completion of a mine. The main reason for the rapid emergence of the following three aspects: First, the physical and mechanical properties of ore and the local geological features of the lack of careful study and master. So give the hole design caused difficulties. At present, the mines are only using the method of shrinking their eyes and increasing the amount of gunpowder as the main measure when they are out of mining.