庙沟铁矿露天转地下开采爆破参数优化
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摘要
为给庙沟铁矿露天转地下开采设计提供最优的爆破参数,结合矿山设计的具体情况,在选定爆破抵抗线长度为1.8 m的基础上,以孔底距为主要参数,对地下开采无底柱分段崩落法的爆破参数设计了4个方案。对设计的4个中深孔爆破方案分别进行了数值模拟计算和爆破效果的综合评价分析。数值模拟结果表明,4个方案的爆破有效应力均能达到矿岩破碎的效果,孔底距长度对爆破有效应力值没有显著影响。以炸药成本、采幅、适宜块度率为评价爆破效果的主要因素,通过模糊综合评价,得出矿山的最优爆破参数是孔底距为2.52 m,为矿山的施工提供了数据依据。
In order to provide optimal blasting parameters for Miaogou Iron Mine transmitted from open-pit to underground mining,combining the practical situation of the mine design,four schemes are designed on blasting parameters of underground sublevel caving,where the length of blasting resistance line is 1. 8 m and the hole bottom distance is taken as main parameters. For the four medium and deep hole blasting schemes,numerical simulations along with comprehensive evaluation and analysis of blasting effect are carried out. Numerical simulation shows that all the four kinds of blasting effective stress can break the rock. The hole bottom distance has no significant influence on blasting effective stress. Explosive cost,mining sites and suitable block rate are taken as main factors to evaluate blasting effect. Through fuzzy comprehensive evaluation,it is concluded that the blasting parameter is optimal when the hole bottom distance is 2. 52 m,which provides data basis for mine construction.
In order to provide optimal blasting parameters for Miaogou Iron Mine transmitted from open-pit to underground mining,combining the practical situation of the mine design,four schemes are designed on blasting parameters of underground sublevel caving,where the length of blasting resistance line is 1. 8 m and the hole bottom distance is taken as main parameters. For the four medium and deep hole blasting schemes,numerical simulations along with comprehensive evaluation and analysis of blasting effect are carried out. Numerical simulation shows that all the four kinds of blasting effective stress can break the rock. The hole bottom distance has no significant influence on blasting effective stress. Explosive cost,mining sites and suitable block rate are taken as main factors to evaluate blasting effect. Through fuzzy comprehensive evaluation,it is concluded that the blasting parameter is optimal when the hole bottom distance is 2. 52 m,which provides data basis for mine construction.
引文
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[3]任凤玉,何荣兴,Thiemo Amadou Mouctar Sow,等.北洺河铁矿改进装药结构试验研究[J].金属矿山,2011(2):9-12.Ren Fengyu,He Rongxing,Thiemo Amadou Mouctar Sow,et al.Experimental study on improving charge structure of blasting hole in Beiminghe Iron Mine[J].Metal Mine,2011(2):9-12.
[4]任凤玉,周宗红,穆太升,等.夏甸金矿中深孔爆破参数优化研究[J].金属矿山,2005(11):4-6.Ren Fenyu,Zhou Zonghong,Mu Taisheng,et al.Parameter optimization for blasting with medium-to-deep holes[J].Metal Mine,2005(11):4-6.
[5]楚立申.中深孔爆破在大冶铁矿的应用[J].矿业工程,2008,6(2):39-40.Chu Lishen.Application of medium-deep blasting holes in Daye Iron Mine[J].Mining Engineering,2008,6(2):39-40.
[6]吴亮,张发勇.浅析矿山开采中爆破参数优化与灾害控制[J].现代矿业,2009(8):19-21.Wu Liang,Zhang Fayong.Preliminary analysis of blasting parameter optimization and hazard control in mining[J].Modern Mining,2009(8):19-21.
[7]周驭,周文海,楼晓明.青海德尔尼铜矿爆破效果评估及优化[J].金属矿山,2015(1):43-46.Zhou Yu,Zhou Wenhai,Lou Xiaoming.Blasting effect evaluation and optimization of Deerni Copper Mine in Qinghai[J].Metal Mine,2015(1):43-46.
[8]叶海旺,朱瑞赓.基于模糊综合评判的岩石分级系统研究[J].武汉理工大学学报,2003(5):47-49.Ye Haiwang,Zhu Ruigeng.Study on classification system based Fuzzy integration judge[J].Journal of Wuhan University of Technology,2003(5):47-49.
[9]祝文化,朱瑞赓,夏元友.堆石坝料开采爆破参数优化的神经网络法研究[J].工程爆破,2001(1):20-23.Zhu Wenhua,Zhu Ruigeng,Xia Yuanyou.Research on optimization of blasting parameters for mining of dam rock-fill material by neural network method[J].Engineering Blasting,2001(1):20-23.
[10]程峰,王杰光,靳丽辉.模糊数学理论在金属矿山安全评估中的应用[J].金属矿山,2007(3):77-80.Cheng Feng,Wang Jieguang,Jin Lihui.Application of fuzzy mathematics theory in mine safety assessment[J].Metal Mine,2007(3):77-80.