边孔角对无底柱分段崩落法放矿效果的影响
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摘要
无底柱分段崩落法采矿中,扇形炮孔的边孔角大小对凿岩爆破、采矿方法结构参数和放矿效果有着较大影响。基于单分段单进路放矿模型,进行了3种进路断面尺寸、6种边孔角的18组放矿物理模拟实验,研究了边孔角对放矿效果的影响。结果表明,边孔角和进路断面尺寸对放矿口上方两侧矿岩的流动性有较大影响,进而影响到放出体的形态;随着边孔角的降低,放矿效果也呈现出一定规律性的变化。
In the mining process with non-pillar sublevel caving method,the side hole angle of the blasting fan hole has a great influence on drilling and blasting,as well as structural parameters and ore drawing effect of mining method.Based on an ore drawing model with single section and single drift,eighteen groups of ore drawing physical simulation experiments with three different cross section sizes and six side hole angles were carried out for studying the impacts of the side hole on ore drawing in this paper.The experimental results showed that the side hole angle and the size of the drift section had a great influence on the fluidity of the ore rock on both sides above the end of the drift,and then affected the shape of the drawing-out body.With the decrease of the side hole angle,the ore drawing effect also showed a certain regularity change.
In the mining process with non-pillar sublevel caving method,the side hole angle of the blasting fan hole has a great influence on drilling and blasting,as well as structural parameters and ore drawing effect of mining method.Based on an ore drawing model with single section and single drift,eighteen groups of ore drawing physical simulation experiments with three different cross section sizes and six side hole angles were carried out for studying the impacts of the side hole on ore drawing in this paper.The experimental results showed that the side hole angle and the size of the drift section had a great influence on the fluidity of the ore rock on both sides above the end of the drift,and then affected the shape of the drawing-out body.With the decrease of the side hole angle,the ore drawing effect also showed a certain regularity change.
引文
[1]William Hustrulid,Rudolf Kvapil.Sublevel caving---past and future[C]//5th International Conference and Exhibition on Mass Mining,LuleSweden,9-11June 2008:107-132.
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[5]孙国权,王星,杨家冕.典型崩落采矿法在我国应用现状及发展趋势[J].现代矿业,2016(12):16-19+23.
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[8]王崴平,陈毓川.全球海运铁矿石市场承压解析与行业影响[J].国土资源科技管理,2016,33(3):54-65.
[9]赵宏强.我国凿岩设备生产企业的困境与突破[J].凿岩机械气动工具,2012(1):1-6.
[10]仲崇春,于长军,黄志国.无底柱分段崩落法回采参数数值研究[J].有色金属(矿山部分),2014,66(6):15-17.
[11]王培涛,杨天鸿,柳小波.边孔角对无底柱分段崩落法放矿影响的颗粒流数值模拟研究[J].金属矿山,2010(3):12-16.
[12]连民杰,李占科.北洺河铁矿无底柱分段崩落法大结构参数确定[J].金属矿山,2004(2):14-16+23.
[2]Geoff Dunstan,Gavin Power.Sublevel caving[M].SMEMining Engineering Handbook/edited by Peter Darling-3rd ed.Published by Society for Mining,Metallurgy,and Exploration,Inc.2011:1417-1436.
[3]李伟波.大台沟铁矿超深地下开采的战略思考[J].中国矿业,2012,21(S8):247-256+271.
[4]何荣兴,任凤玉,宋德林,等.大结构参数无底柱分段崩落法的发展及技术问题探讨[J].金属矿山,2015(6):1-5.
[5]孙国权,王星,杨家冕.典型崩落采矿法在我国应用现状及发展趋势[J].现代矿业,2016(12):16-19+23.
[6]宋晓双,杨溢,刘磊,等.兰尖铁矿无底柱分段崩落法采场结构参数研究[J].金属矿山,2016(4):16-19.
[7]余正方.大红山铁矿二期大参数放矿试验[J].现代矿业,2014(2):14-16.
[8]王崴平,陈毓川.全球海运铁矿石市场承压解析与行业影响[J].国土资源科技管理,2016,33(3):54-65.
[9]赵宏强.我国凿岩设备生产企业的困境与突破[J].凿岩机械气动工具,2012(1):1-6.
[10]仲崇春,于长军,黄志国.无底柱分段崩落法回采参数数值研究[J].有色金属(矿山部分),2014,66(6):15-17.
[11]王培涛,杨天鸿,柳小波.边孔角对无底柱分段崩落法放矿影响的颗粒流数值模拟研究[J].金属矿山,2010(3):12-16.
[12]连民杰,李占科.北洺河铁矿无底柱分段崩落法大结构参数确定[J].金属矿山,2004(2):14-16+23.