Development of multiphysics mathematical models for sustainable minerals and energy extraction

开发可持续矿物和能源开采的多物理场数学模型

• 批准号: RGPIN-2021-02901
• 负责人: Sasmito, Agus
• 金额: $ 3.79万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=742273
• 关键词: Development; multiphysics; mathematical; models; sustainable

Fewer world class mineral deposits are being found at the surface which requires advances in mining and extraction technologies that will enable sustainable mining excavations in challenging environments, such as deep and arctic mines. The most difficult challenges to competitive mining, however, relate to productivity, safety, energy constraints, as well as increased environmental requirements. To address these issues, one requires in-depth and comprehensive understanding of the multidimensionality of mining problems ranging from large mining system to subsystem to component to micro/nanoscale phenomena coupled to each other. The proposed Discovery Program aims to tackle some of these challenges. Unlike traditional mining engineering approach, the applicant's expertise in multiscale and multiphysics modeling of mining system is very well aligned with the requirements to enable the development of novel "tools" based on various scale and physical phenomena leading to great knowledge advances and innovation in mining. This research program, addresses three integrated and interdisciplinary key research priorities, as follows: Theme 1: Renewable mine ventilation, heating and cooling: This focuses on the fundamental and applied aspect of "hot" and "cold" thermal energy extraction and storage using sensible and latent heat for mine heating and cooling. Rock thermal energy storage will be investigated for mine heating and cooling coupled with carbon sequestration. Spray freezing air heating coupled with ice slurry will also be evaluated for deep mine air heating and cooling. Mathematical model will be developed along with experimental validation for proof-of-concept. Theme 2: Renewable energy-based artificial ground freezing (AGF): This focuses on the development of thermosyphon coupled with "cold" energy storage based on phase change materials (PCM) for AGF. It aims at the development of a novel conjugate mathematical model capable of assessing the interaction between cold extraction in thermosyphon and storage rate in PCM. A physical model will be made in our laboratory for validation and proof-of-concept. This technique will enable the system to freeze the ground for whole year round without the need to run an active refrigeration plant in the summer. Theme 3: Modeling of microwave-thermal-mechanical-tool interactions for the development of continuous excavation machine: This aims to develop four-way coupling of mathematical model that can simulate the effect of microwave irradiation to the heat transfer and microfractures in the rocks, which reduces the overall strength of the rock. The interactions of the preconditioned with cutting tool for continuous excavation machine will also be investigated. In the long-term, the proposed three inter-related research themes are intended to pave the way to improve the sustainability of mining operations, especially for mining in challenging environments.

地表发现的世界级矿藏越来越少，这需要采矿和开采技术的进步，以便在深部和北极矿山等充满挑战的环境中实现可持续采矿。然而，竞争性采矿面临的最困难的挑战与生产力、安全、能源限制以及日益增长的环境要求有关。为了解决这些问题，需要深入、全面地理解采矿问题的多维性，从大型采矿系统到子系统到组件再到相互耦合的微/纳米尺度现象。 拟议的发现计划旨在解决其中一些挑战。与传统采矿工程方法不同，申请人在采矿系统多尺度和多物理建模方面的专业知识非常符合基于各种尺度和物理现象开发新型“工具”的要求，从而导致采矿领域的巨大知识进步和创新。该研究计划涉及三个综合和跨学科的重点研究重点，如下： 主题 1：可再生矿井通风、加热和冷却：重点关注利用合理的“热”和“冷”热能提取和存储的基础和应用方面以及矿井加热和冷却的潜热。将研究岩石热能储存用于矿井加热和冷却以及碳封存。喷雾冷冻空气加热与冰浆相结合也将用于深部矿井空气加热和冷却的评估。将开发数学模型以及概念验证的实验验证。主题2：基于可再生能源的人工地面冻结（AGF）：重点是开发热虹吸管以及基于相变材料（PCM）的AGF“冷”能量存储。它的目的是开发一种新颖的共轭数学模型，能够评估热虹吸管中的冷提取与 PCM 中的存储速率之间的相互作用。我们的实验室将制作物理模型以进行验证和概念验证。这项技术将使系统能够全年冻结地面，而无需在夏季运行主动制冷设备。主题3：微波-热-机械-工具相互作用建模，用于连续挖掘机的开发：旨在开发四向耦合的数学模型，可以模拟微波辐射对岩石中传热和微裂缝的影响，这降低了岩石的整体强度。还将研究预处理与连续挖掘机切削刀具的相互作用。从长远来看，拟议的三个相互关联的研究主题旨在为提高采矿作业的可持续性铺平道路，特别是在充满挑战的环境中采矿。