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爆破工作对每个矿山来说都是非常重要的。这项工作的好坏,直接给采装、运输、破碎等工作带来很大影响。我矿采矿车间为改变过去使用齐发爆破的被动局面,学习兄弟单位的好经验,于1976年4月开始试验使用留碴微差挤压爆破技术。经过两年多的实践,摸索出一套在石灰岩中使用这种爆破技术的经验。我矿石灰岩的硬度中等,岩石硬度系数f=8～10;平均抗压强度为896公斤/厘米~2;容重为2.7
Blasting work is very important for every mine. This work is good or bad, directly to the collection, transportation, crushing and other work a great impact. In order to change the passive situation of using blow-up in the past, I learned the good experience of fraternal units and started the experiment in April 1976 using the residual ballasting micro-extrusion blasting technology. After more than two years of practice, we explored a set of experiences in using such blasting techniques in limestone. The hardness of mine limestone is medium, the rock hardness coefficient f = 8 ~ 10; the average compressive strength is 896 kg / cm ~ 2; the bulk density is 2.7