Distinct element modelling of fracture plan control in continuum and jointed rock mass in presplitting method of surface mining

查看全文 作　　者：Sharafisafa [1]Mansour;Aliabadian [1]Zeinab;Alizadeh [2]Rezvan;Mortazavi [1]Ali

机构地区：[1]Department of Mining, Metallurgy and Petroleum Engineering, Amirkabir University of Technology;[2]Department of Mining Engineering, Sahand University of Technology

出　　处：《International Journal of Mining Science and Technology》索引2014年第24卷第6期,共11页

摘　　要：Controlled blasting techniques are used to control overbreak and to aid in the stability of the remaining rock formation. Presplitting is one of the most common methods which is used in many open pit mining and surface blast design. The purpose of presplitting is to form a fracture plane across which the radial cracks from the production blast cannot travel. The purpose of this study is to investigate of effect of presplitting on the generation of a smooth wall in continuum and jointed rock mass. The 2D distinct element code was used to simulate the presplitting in a rock slope. The blast load history as a function of time was applied to the inner wall of each blasthole. Important parameters that were considered in the analysis were stress tensor and fracturing pattern. The blast loading magnitude and blasthole spacing and jointing pattern were found to be very significant in the final results. 关键词：计划控制岩体裂隙预裂露天采矿元模型控制爆破技术炮眼间距爆炸载荷

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Distinct element modelling of fracture plan control in continuum and jointed rock mass in presplitting method of surface mining

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