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我矿过去在深孔爆破上,往往由于填塞材料的质量不好,或填塞长度不够,因此经常产生很多超过允许尺度的大块,井造成繁重的二次破碎工作和放矿的困难。按规定,一般在深孔上填塞长度要求达到3～5公尺。但我矿要做到这点是非常困难的。后来学习了苏联先进经验,在深孔爆破上使用木橛作充填材料(见图),试验结果,对消灭大块的效果良好,而且还保证了效率不会降低。木橛的主要作用是能增加爆破时填塞物的抵抗能力,在瞬间药包爆破时,气体不易挤出和逸散,
In the past, in the deep-hole blasting of mine, often due to the poor quality of the packing material or the insufficient length of the packing, a lot of chunks larger than the allowable size were often produced, causing heavy secondary crushing work and difficulty in ore drawing. According to regulations, generally in the deep hole to fill the length required to reach 3 to 5 meters. But mine mine to do this is very difficult. Later learned the advanced Soviet experience, the use of deep-hole blasting as a filling material (see photo), the test results on the elimination of chunks of good results, but also ensures that the efficiency will not be reduced. The main role of clogs is to increase the resistance of the stuffing when blasting, in the instant burst of medicine, the gas is not easy to squeeze out and escape,