急倾斜薄矿脉崩落法开采及崩落散体的承载机理
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摘要
以金厂沟梁金矿为工程依托,利用崩落矿岩散体的承载机理,提出了急倾斜薄矿脉破碎矿体崩落法开采方案.运用数值计算手段,研究崩落矿岩散体的承载机制,分析分段高度对崩落矿岩散体承载效果的影响.计算结果表明:与空场法开采相比,崩落法开采有效改善了采场围岩的稳定性,围岩塑性区体积减小了58.4%.随着分段高度的增大,崩落矿岩散体对围岩的支撑作用相应减弱,但影响较小.研究结果表明,采用崩落法回采急倾斜薄矿脉破碎矿体是合理的、可行的,同时也为该类矿体的回采提供了新的思路.
Based on the gold mine in Jinchanggouliang,taking advantage of the supporting role of caved rock,a caving mining method was proposed for steeply inclined narrow veins.Using numerical simulation method,the support mechanism action of caved rock for surrounding rock was studied and the influence of sublevel height on the supporting effect of caved rock was analyzed.The calculation results are as follows:the stability of surrounding rock increases significantly by the caving mining method compared with the open stope method and the volume of plastic zone decreases by 58.4%.With the increase of the sublevel height,the support effect of caved rock decreases slightly.The research result provides a new way for mining the broken orebody with steeply inclined narrow veins based on caving mining method.The feasibility and rationality of the caving mining method are also verified.
Based on the gold mine in Jinchanggouliang,taking advantage of the supporting role of caved rock,a caving mining method was proposed for steeply inclined narrow veins.Using numerical simulation method,the support mechanism action of caved rock for surrounding rock was studied and the influence of sublevel height on the supporting effect of caved rock was analyzed.The calculation results are as follows:the stability of surrounding rock increases significantly by the caving mining method compared with the open stope method and the volume of plastic zone decreases by 58.4%.With the increase of the sublevel height,the support effect of caved rock decreases slightly.The research result provides a new way for mining the broken orebody with steeply inclined narrow veins based on caving mining method.The feasibility and rationality of the caving mining method are also verified.
引文
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[9]蔡美峰,何满朝,刘东燕.岩石力学与工程[M].北京:科学出版社,2002.(Cai Mei-feng,He Man-chao,Liu Dong-yan.Rock mechanics rock engineering[M].Beijing:Science Press,2002.)
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[2]王志方.矿岩欠稳的急倾斜薄矿脉采矿方法与工艺的改进[J].中国矿山工程,1995(5):1-7.(Wang Zhi-fang.Improvement of mining method and process of steeply inclined thin veins with unstable rock[J].China Mine Engineering,1995(5):1-7.)
[3]陈永生,付长怀,张腾.分段凿岩阶段矿房法在急倾斜薄矿脉中的应用[J].沈阳黄金学院学报,1996,15(2):191-195.(Chen Yong-sheng,Fu Chang-huai,Zhang Teng.Application of sublevel stoping mining method in steeply inclined thin vein[J].Journal of Shenyang Institute of Gold Technology,1996,15(2):191-195.)
[4]Rupprecht S M.Long hole drilling in narrow vein mining[M]//Mine Planning and Equipment Selection.London:Taylor&Francis Group,2004:297-302.
[5]Robenton B E,Vehkala J T,Kerr S S.Alimak narrow vein mining at the Dome Mine[J].CIM Bulletin,1990,83(938):63-66.
[6]任凤玉,李楠,常帅,等.眼前山铁矿主采区露天转地下诱导冒落法开采方案研究[J].金属矿山,2010(2):42-45.(Ren Feng-yu,Li Nan,Chang Shuai,et al.Study on the induced caving method in transferring from open-pit to underground mining in main mining area of Yanqianshan Iron Mine[J].Metal Mine,2010(2):42-45.)
[7]林韵梅.地压讲座[M].北京:冶金工业出版社,1981:2-16.(Lin Yun-mei.Ground pressure lecture[M].Beijing:Metallurgical Industry Press,1981:2-16.)
[8]Brunton I D.The impact of blasting on sublevel caving material flow behavior and recovery[D].Brisbane:University of Queensland,2009.
[9]蔡美峰,何满朝,刘东燕.岩石力学与工程[M].北京:科学出版社,2002.(Cai Mei-feng,He Man-chao,Liu Dong-yan.Rock mechanics rock engineering[M].Beijing:Science Press,2002.)
[10]Stewart P C.Minimizing dilution in narrow-vein mines[D].Brisbane:University of Queensland,2005.