宽孔距小抵抗线爆破技术在尖山磷矿的应用研究

发布时间：2018-01-25 18:58

本文关键词： 宽孔距小抵抗线炮孔密集系数大块率爆破振动　出处：《爆破》2017年01期 　论文类型：期刊论文

【摘要】：为改善尖山磷矿爆破质量、提高生产效率、节约生产成本,结合矿山生产进行多次试验,与原矿山爆破开挖方式对比分析,确定了更适合该矿山生产的宽孔距小抵抗线爆破方式。对大块率的统计和对振动的监测表明:炮孔密集系数m为2时,五次试验的大块率比实验前矿山原方案的大块率分别降低了10.4%、16.7%、15.6%、11.5%和13.5%,且大块的最大外形尺寸比试验前大块的最大外形尺寸总体上要小;新爆破方式下单响药量增加,但实测振动速度与原方案产生的振动速度基本持平,振动主频也与原方式下相近。试验开挖的过程中没有出现大块根底和超挖现象,优化了矿山爆破开挖方案。
[Abstract]:In order to improve blasting quality, improve production efficiency and save production cost, combined with mine production, several tests were carried out and compared with the original mine blasting excavation methods. The blasting method of wide hole spacing and small resistance line is determined, and the statistic of bulk ratio and vibration monitoring show that the borehole density coefficient m is 2:00. Compared with the original scheme before the experiment, the boulder rate of the five tests was 10.4% and 16.7% lower than that of the original scheme before the experiment, respectively, and 11.5% and 13.5% respectively. And the largest size of the bulk is smaller than that before the test. The new blasting method has increased the quantity of the ordered charge, but the measured vibration velocity is basically the same as that produced by the original scheme. The main frequency of vibration is similar to that under the original mode. There is no large base and overdigging in the process of experimental excavation, so the excavation scheme of mine blasting is optimized.
【作者单位】：昆明理工大学国土资源工程学院;昆明理工大学爆破新技术应用研究所;国家磷资源开发利用工程技术研究中心;云南磷化集团有限公司;云南磷化集团尖山磷矿有限公司;
【基金】：云南省应用基础研究项目(2013FZ036)
【分类号】：TD235.4;TD87
【正文快照】： 宽孔距小抵抗线爆破技术在露天矿开挖中应用广泛,该技术主要是在单孔负担面积一定的条件下,增加孔距、减小排距(抵抗线)。国内外研究表明:宽孔距小抵抗线技术无论在改善爆破质量,还是在降低炸药单耗、增加延米爆破量方面都表现出了很大的潜力。实际生产中炮孔密集系数m值太小

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