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Target fragmentation for efficient loading and crushing - the Aitik case

机译：目标碎片，用于高效装载和粉碎 - AITIK案例

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摘要

Blast-induced fragmentation has a significant influence on the operational efficiency of open pit mines, especially on loading and crushing, the two immediate tasks after blasting. This study presents an empirical method to determine the target fragmentation for efficient loading and crushing at the Aitik mine in Sweden. In the study, the loading efficiency of rope shovels was correlated to the energy consumption and throughput of a gyratory crusher. Two photographic techniques were utilized to assess the feed fragmentation, considering the lithological origin of the ore as an indicator of hardness. The results indicate ore hardness is most influential in mid-range fragmentation, with a marginal effect in coarser fragmentations. The influence of fragmentation is more pronounced in the coarse region, with a sudden reduction in efficiency for P_(80) values coarser than 800 mm. The results suggest tailoring the fragmentation to a P_(80) of 600-800 mm could lead to higher operational efficiency at Aitik.
机译：爆炸造型的碎裂对露天矿物矿井的运营效率有显着影响，特别是在装载和破碎，爆破后的两个即时任务。本研究提出了一种实证方法，用于确定瑞典AITIK矿的有效装载和粉碎的目标碎片。在该研究中，绳索铲的装载效率与助剂破碎机的能量消耗和产量相关联。考虑到矿石的岩性起源作为硬度的指标，使用两种摄影技术来评估饲料碎片。结果表明矿石硬度在中档碎片中具有最大影响，在较粗糙的碎片中具有边际效应。碎片化的影响在粗糙区域中更明显，突然降低P_（80）值粗略于800mm。结果表明，定制了600-800 mm的P_（80）的碎片可能导致AITIK的运营效率更高。

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