Integrated approach to optimize mineral extraction efficiency in Canada's underground diamond mines

优化加拿大地下钻石矿矿物开采效率的综合方法

• 批准号: 506045-2016
• 负责人: Apel, Derek
• 金额: $ 2.26万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696805
• 关键词: Integrated; approach; optimize; mineral; extraction

Due to a combination of mining methods used to extract the mineral deposits and the tectonic stress regime unique to the kimberlite pipes the Canadian underground diamond mines are currently experiencing significant ground movements and in some instances some mines are reporting severe ground failures at their underground openings. These ground failures are not only hazards to the safety of mining employees but also reduce the extraction efficiency of the mineral and revenues at these mines. The high cost of underground operations and the low economy make the situation even worse. The goal of this proposal is to develop an integrated approach in increasing extraction efficiently. Firstly, a systematic characterization of the host rock and cemented rock fill (CRF) will be conducted through a series of comprehensive laboratory and field in-situ investigations. After that, a stress-strain-volume change constitutive law will be derived from these characterizations for both rock mass and CRF in numeric modeling. Moreover, an assessment of the stability of underground workings will be implemented after pillar recoveries. At the end, ground performances will be monitored and data will go back to the prediction model as feedback and adjustments. As a result, a practical design guideline will be prepared to assist the pillar recovery for Diavik and other underground Canadian diamond mines.

由于开采矿床所使用的采矿方法和金伯利岩管道特有的构造应力状况，加拿大地下钻石矿目前正经历重大的地面移动，在某些情况下，一些矿报告说其地下开口出现严重的地面故障。这些地面故障不仅危害采矿员工的安全，而且还降低了这些矿山的矿物开采效率和收入。井下作业成本高，经济效益低，使情况更加恶化。 该提案的目标是制定一种综合办法，提高开采效率。首先 将通过一系列全面的实验室和现场实地调查，对主岩和胶结填石（CRF）进行系统表征。在此基础上，通过数值模拟得到了岩体和CRF的应力-应变-体积变化本构关系。此外，在煤柱回收后，将对地下巷道的稳定性进行评估。最后，将监测地面性能，数据将作为反馈和调整返回到预测模型。因此，将编写一份实用的设计准则，以协助Diavik和加拿大其他地下钻石矿的矿柱回收工作。