Development and validation of a 3-D bonded block modelling approach to assist in the assessment of rock mass bulking and support design for highly stressed mine pillars

开发和验证 3D 粘结块建模方法，以协助评估岩体膨胀和高应力矿柱的支撑设计

• 批准号: 479085-2015
• 负责人: Eberhardt, Erik
• 金额: $ 4.13万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618153
• 关键词: Development; validation; bonded; block; modelling

With ever growing populations and rising living standards, worldwide demand for mineral resources continues to increase. Resource-rich countries like Canada are responding by mining deeper as near surface resources are exhausted. Several Canadian operations already represent some of the deepest mines in the world, and plans are to continue deeper. These will encompass large underground footprints with numerous rock pillars that are essential for maintaining safe and economic working conditions. The challenge is that during excavation, these pillars will experience significant stress-induced strength degradation and deformation leading to extensive loading of the support system, potentially leading to its failure. To address these needs, Rio Tinto through their Sudbury based Rio Tinto Centre for Underground Mine Construction (RTC-UMC), have provided research funding to (i) investigate the underlying mechanisms of rock mass bulking under complex mine stress paths, (ii) develop a numerical tool that can better account for these mechanisms, and (iii) compare and contrast the effectiveness of different support strategies. Towards this goal we have partnered with software provider Itasca to use their commercial 3-D distinct-element code 3DEC to develop a bonded-block brittle fracture modelling tool, referred to here as 3DEC-BBM. Model development will be carried out in parallel with validation and calibration exercises, using both controlled laboratory experiments and field-based data. Upon completion, the results of this research will significantly enhance Canada's body of knowledge and expertise in deep mining and rock support optimization. New tools will be developed (together with guidelines on their use) that will assist engineers in designing and safely developing the next generation of Canadian mines, helping to secure the sustainability of the industry. It will also provide HQP with unique and practical learning experiences and skill sets that are in high demand in the mining industry and are of strategic importance for Canada's future natural resource development needs.

随着人口不断增长和生活水平的增长，全球对矿产资源的需求不断增加。像加拿大这样的资源丰富的国家正在通过更深入地挖掘，因为近乎表面的资源已经耗尽。加拿大的几项业务已经代表了世界上一些最深的矿山，并且计划将继续更深入。这些将涵盖大型地下足迹，并具有许多岩石支柱，这对于维持安全和经济的工作条件至关重要。面临的挑战是，在挖掘过程中，这些支柱将经历重大压力引起的强度降解和变形，从而导致支撑系统的广泛负载，这可能导致其失败。为了满足这些需求，Rio Tinto通过其总部位于萨德伯里的Rio Tinto地下矿山建设中心（RTC-UMC）提供了研究资金，以（i）调查在复杂的矿山应力路径下岩体堆积的潜在机制，（ii）可以更好地解释这些机制的数值工具，并以这些机制和（iii）的效率来说明和相反的策略。为了实现这一目标，我们已经与软件提供商ITASCA合作，使用其商业3-D不同元素代码3DEC开发粘合块脆性断裂建模工具，此处称为3DEC-BBM。模型开发将与受控实验室实验和基于现场的数据同时与验证和校准练习并行进行。完成后，这项研究的结果将显着增强加拿大在深层采矿和岩石支持优化方面的知识和专业知识。将开发新工具（以及有关其使用的准则），这将有助于工程师设计和安全开发下一代加拿大矿业，从而帮助确保行业的可持续性。它还将为HQP提供独特的实用学习经验和技能，这些经验和技能集中在采矿业需求很高，并且对加拿大未来的自然资源开发需求具有战略重要性。