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Oversize Reduction Project at the Iron Ore Company of Canada

机译：加拿大铁矿石公司的超大型减量项目

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摘要

The Iron Ore Company (IOC) of Canada Mining and Operations Departments expressed anrninterest in reducing the amount of oversize material (>1 m × 1 m × 1 m) being produced andrnits subsequent downstream effects including in-pit sorting and reduction, damage to mobilernequipment, and signifi cant delays in the loading pockets and the primary crushers. To achievernthis goal an oversize reduction project was undertaken by the mine and to date has signifi cantlyrnimproved upon baseline measures.rnOne key approach used to reduce the amount of oversize was the implementation of thickerrnemulsion. The introduction of a thicker emulsion into the blastholes provided more resistance tornthe forces created by dynamic water and reduced the infi ltration of the emulsion into the cracks andrnfi ssures of the rock mass. Blast results showed reduced amounts of oversize and more consistentrnfragmentation throughout the muck piles. Additionally, a signifi cant reduction in nitrates leachedrninto the mine water discharge has been realised.rnTo determine the effectiveness of the oversize reduction project, IOC used shovel based camerarntechnology to assess fragmentation presented to the shovel at the digging face. A digital visionrnsystem (DVS) was installed on one of the shovels to capture images that were stamped with globalrnpositioning system (GPS) locations. A large population of digital images was analysed to producerna robust fragmentation distribution baseline that was used as one of the mine key performancernindicators (KPI). Changes to blasting practice were subsequently measured against the baselinernKPI to assess effectiveness.
机译：加拿大采矿和运营部门的铁矿石公司（IOC）表示对减少生产的过大物料（> 1 m×1 m×1 m）的数量表示不满，并对随后的下游影响（包括矿井分拣和减少，移动设备的损坏）产生了兴趣。 ，并明显延迟了装载区和主破碎机的运行。为了实现这一目标，矿山开展了一项减少超大型项目，迄今为止，该项目已大大改善了基线措施。减少超大型数量的一种关键方法是实施增稠乳剂。将较厚的乳状液引入爆破孔可更大程度地抵抗动态水所产生的作用力，并减少乳状液渗入岩体的裂缝和裂缝中的可能性。爆炸结果表明，在整个渣土堆中，过大的碎屑减少，碎片更均匀。此外，已经实现了矿井排水中沥出的硝酸盐的显着减少。为了确定超大型减排项目的有效性，IOC使用了基于挖土机的摄像头技术来评估挖土机在挖土机上的破碎情况。数字视觉系统（DVS）安装在其中一台铁锹上，以捕获标有全球定位系统（GPS）位置的图像。对大量的数字图像进行了分析，以得出生产者可靠的碎片分布基线，该基线被用作矿山关键性能指标（KPI）之一。随后根据基准KPI评估爆破实践的变化，以评估效果。

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  • 来源
    《Iron ore 2011》|2011年|p.513-519|共7页
  • 会议地点 Perth(AU)
  • 作者

    R Pinksen; J P R Proulx;

  • 作者单位

    Iron Ore Company of Canada, 2 Avalon Drive, Labrador City NL A2V 2Y6, Canada. Email: Rodney.Pinksen@ironore.ca;

    Advanced Mining Solutions, Orica USA Inc, 33101 E Quincy Avenue, Watkins CO 80137, USA. Email: remi.proulx@orica.com;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
  • 关键词

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