Synthetic Rock Mass (SRM) modelling Incorporating Realistic 3D Discrete Fracture Network (DFN) for Advanced Rock Engineering

合成岩体 (SRM) 建模结合真实 3D 离散断裂网络 (DFN) 进行高级岩石工程

• 批准号: 560390-2020
• 负责人: Cai, Ming
• 金额: $ 4万
• 依托单位: Laurentian University of Sudbury
• 依托单位国家: 加拿大
• 项目类别: Alliance 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=707082
• 关键词: Synthetic; Rock; Mass; SRM; modelling

Rock masses contain discontinuities at different scales, such as cracks, joints, shears and faults, forming discrete fracture networks (DFNs). These fracture networks have significant effects on rock fragmentation, excavation stability, fluid flow, and contaminant transport. The motivation of this research program is to incorporate realistic DFN in advanced numerical simulation models to investigate the excavation response of mining engineering structures such as tunnels, stopes, and open-pit slopes so as to reduce rock engineering risk and improve mining safety and productivity. The objectives of the project are: (1) to conduct research to improve the capabilities of the MoFrac tool for engineers and geoscientists in Canada to conduct realistic 3D DFN modelling effectively; (2) to demonstrate how advanced rock engineering in fractured rock masses can be conducted using the advanced synthetic rock mass modelling approach that incorporates realistic DFN models; (3) to transfer knowledge to the industry by means of (i) deploying the new algorithms and modules in the MoFrac tool and making the new-feature-enhanced tool available to Canadian researchers and subsequently to industry at large; (ii) training of new HQPs and personnel from the industry partners; and (iii) publishing the research results in high impact peer-reviewed journals and international conferences. The approach to be adopted is a combined application of experimental observation, field monitoring, and numerical modeling. The outcome of the research will contribute to nuclear waste management and mining in Canada to allow engineers to have an advanced tool to conduct engineering design analysis in fractured rock masses. This has the distinct potential to materially improve the safety, productivity, and profitability of surface and underground engineering projects.

岩体中含有不同尺度的不连续面，如裂缝、节理、剪切和断层等，形成离散断裂网络。这些裂缝网络对岩石破碎、开挖稳定性、流体流动和污染物运移具有重要影响。本课题的研究动机是将现实的DFN与先进的数值模拟模型相结合，研究隧道、采场、露天矿边坡等矿山工程结构的开挖响应，从而降低岩石工程风险，提高矿山安全生产水平。