黄金科学技术 ›› 2023, Vol. 31 ›› Issue (2): 331-339.doi: 10.11872/j.issn.1005-2518.2023.02.091
Yifeng ZHANG1(),Hongchao LI1,2(),Zhiyu ZHANG3,Heng LI1
摘要:
为了提高云南省某锡矿小断面巷道掘进炮孔利用率,降低炸药单耗,基于正交试验的原理,对角柱形掏槽爆破参数进行优化。经分析确定,以装药量、装药孔距空孔的距离、空孔孔径和填塞长度作为试验因素,炮孔利用率和槽腔体积作为试验指标,每种因素取3个水平;通过极差和方差分析研究不同因素对试验指标影响的显著性,确定试验因素的最优组合。研究结果表明:对于小断面巷道掘进角柱形掏槽,当空孔孔径为70 mm,装药孔距空孔的距离为10 cm,装药量为3 kg,炮泥填塞长度为20 cm时,掏槽能够取得良好爆破效果,经过多次现场巷道掘进试验验证,炮孔利用率可由80%提高至93%以上。
中图分类号:
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