Investigation of blast hole logging while drilling for the Pine Cove Mine

Pine Cove 矿钻探爆破孔测井调查

• 批准号: 486503-2015
• 负责人: Butt, Stephen
• 金额: $ 1.82万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=585646
• 关键词: Investigation; blast; hole; logging; while

Anaconda Mining Inc. operates the Pine Cove open pit gold mine and mill in the Baie Verte Mining District on the island of Newfoundland, and holds mineral rights for several other nearby gold deposits and projects in various stages of development. At the Pine Cove Mine, one major problem is related to mine blasting, grade control and overall recovery of ore. Currently, blast holes for bench blasts are drilled with rotary-percussion drills and bulk cuttings for the full blast hole are sampled when the hole is finished and analysed to determine the average ore grade within the hole interval. This will determine if the volume is designated as ore to send to the mill for processing, or waste to be directed to the waste area. However, using this method, it is difficult to determine the ore and waste rock intervals within a drilled blast hole, and it has been shown that a thin high grade zone can be mistakenly identified as a low grade waste zone due to the dilution of the cuttings. This results in portions of the blasted muck being grouped in the wrong ore grade category for processing or, worse, being designated as waste with no gold recovery at all. A means to identify the depth intervals for the formations drilled and corresponding sampled cuttings is needed, and this will be addressed through collaboration with the Drilling Technology Laboratory (DTL) at Memorial University of Newfoundland (MUN). It is expected that positive outcomes form this proposed research would lead to further collaboration on rock penetration and fragmentation problems within the company's mining and development activities.

Anaconda矿业公司在Baie Verte矿区经营Pine Cove露天金矿和磨坊， 纽芬兰岛，并拥有附近其他几个金矿和项目的采矿权， 不同的发展阶段。在Pine Cove矿，一个主要问题与矿山爆破有关， 控制和全面回收矿石。目前，台阶爆破的爆破孔是用旋转冲击钻的 当孔完成时，对用于全爆破孔的钻屑和大块钻屑进行取样并分析，以确定 孔段内的平均矿石品位。这将确定卷是否被指定为要发送到的ore 用于加工的磨机，或将废物引导至废物区。然而，使用这种方法， 确定矿石和废石间隔内钻爆孔，它已被证明，薄高 由于钻屑的稀释，品位区可能被错误地识别为低品位废物区。这 导致被爆破的淤泥的一部分被分组在错误的矿石等级类别中以进行处理，更糟的是， 被指定为没有黄金回收的废物。一种识别深度间隔的方法， 需要钻取地层和相应的钻屑取样，这将通过 与纽芬兰纪念大学钻井技术实验室（DTL）合作 （MUN）.预计这项拟议研究的积极成果将导致进一步的合作 公司采矿和开发活动中的岩石渗透和破碎问题。