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This is the complete lecture note for MNE504 Mine Design II (Design of Underground Mines and Facilities). You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS • Course code: MNE504 • Course title: Mine Design II (Design of Underground Mines and Facilities) • Course credit load: 3 Series 1: Principles of Underground Mine Design Series Outline • 1.1 Fundamentals of Underground Mine Design o 1.1.1 Definition and scope of mine design o 1.1.2 Objectives of underground mine design o 1.1.3 Key stages in mine design planning • 1.2 Geological and Mineral Considerations o 1.2.1 Geological data collection and interpretation
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS o 1.2.2 Mineral deposit characteristics influencing design o 1.2.3 Cut-off grade and mineral modelling • 1.3 Selection of Mining Methods o 1.3.1 Criteria for choosing underground mining methods o 1.3.2 Machinery and equipment considerations o 1.3.3 Case examples of method selection • 1.4 Safety and Environmental Factors o 1.4.1 Rules of conduct for safe underground work o 1.4.2 Environmental and sustainability considerations o 1.4.3 Risk assessment in mine design • 1.5 Application of Software and Practical Design o 1.5.1 Software tools for mine design o 1.5.2 Integration of design techniques into practice o 1.5.3 Practical design project overview Introduction Designing an underground mine is a complex and highly specialised task that requires careful consideration of geology, engineering, safety, and economics. Unlike surface mining, underground mining involves working in confined spaces where ventilation, support systems, and method selection are critical to both productivity and safety. This Series will provide you with the foundational principles needed to understand how underground mines are planned and designed, preparing you to engage with more advanced aspects of mine design later in the course. The aim of this Series is to equip you with the knowledge and skills to define the scope of underground mine design, analyse geological and mineral factors, evaluate suitable mining methods, and apply practical design tools in a safe and efficient manner. We shall commence this Series by examining the fundamentals of underground mine design, including its scope, objectives, and planning stages. Next, we will move on to geological and mineral considerations, focusing on how deposit characteristics and cut-off grades influence design. Following that, we will explore the selection of mining methods, considering both criteria and equipment. Subsequently, we will address safety and environmental factors, highlighting rules of conduct and risk assessment. Finally, we will conclude with the application of software and practical design projects, where theoretical knowledge is integrated into practice. Series Learning Outcomes
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Upon completing this Series, you should be able to: • SLO 1.1 define the scope and objectives of underground mine design, • SLO 1.2 explain how geological and mineral deposit characteristics influence mine design, • SLO 1.3 analyse criteria for selecting appropriate underground mining methods, • SLO 1.4 evaluate safety and environmental factors in underground mine design, and • SLO 1.5 apply software tools and practical techniques to design underground mines. • a collection and interpretation, which provides information about the deposit’s size, shape, and quality. • Feasibility studies, which assess whether mining is economically and technically viable. • Layout design, which determines the arrangement of shafts, tunnels, and stopes. • Safety and environmental planning, which ensures compliance with regulations and sustainability standards. • Implementation, where the design is translated into actual construction and operation. Feasibility study is a detailed analysis that evaluates whether a mining project can be successfully undertaken, considering technical, economic, and environmental factors. Fill in the blank: The stage that evaluates whether a mining project is viable is called a _______ study.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Table 1.1 Key stages in underground mine design planning Pilot questions 1.1 1. Define mine design in your own words. 2. List two objectives of underground mine design. 3. Which stage of mine design involves geological data collection? 4. What is meant by ore recovery? 5. Why is safety considered a primary objective in mine design? 1.2 Geological And Mineral Considerations 1.2.1 Geological data collection and interpretation Geological data refers to information gathered about the physical characteristics of the earth’s crust, including rock types, structures, and mineral deposits. In underground mine design, geological data collection is essential because it determines the feasibility and safety of mining operations. Methods of collection include core drilling, geophysical surveys, and mapping. Once collected, the data must be interpreted to understand the deposit’s geometry, continuity, and quality. Accurate interpretation helps in predicting ore boundaries and planning excavation layouts. If geological data is misinterpreted, the mine design may lead to unsafe conditions or poor recovery rates.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Fill in the blank: Geological data provides information about the _______ and mineral deposits of the earth’s crust. Diagram showing geological data collection methods such as drilling, mapping, and geophysical surveys. Caption: Figure 1.2 Geological data collection methods 1.2.2 Mineral deposit characteristics influencing design Mineral deposit characteristics are the physical and chemical properties of a mineral body that influence how it can be mined. These include size, shape, depth, grade, and orientation. For example, a narrow vein deposit may require selective mining methods, while a large tabular deposit may allow for bulk mining. The grade of a deposit refers to the concentration of valuable minerals within the ore. Higher grades generally justify more intensive mining, while lower grades may require careful economic evaluation. The orientation of a deposit, whether horizontal, inclined, or vertical, also dictates the type of excavation and support systems needed. Fill in the blank: The concentration of valuable minerals within ore is known as the _______.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Image showing different types of mineral deposit shapes (vein, tabular, massive). Caption: Plate 1.1 Types of mineral deposit shapes 1.2.3 Cut-off grade and mineral modelling Cut-off grade is the minimum grade at which a unit of ore is considered economically viable to mine. Ore below this grade is classified as waste. Determining the cut-off grade is crucial because it directly affects the size of the mineral reserve and the profitability of the mine. Mineral modelling involves creating a three-dimensional representation of the deposit using geological data and cut-off grades. This model helps in visualising ore distribution, estimating reserves, and planning stope design. Modern software packages are often used to generate accurate models that guide decision-making. Fill in the blank: Ore below the cut-off grade is classified as _______.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Table 1.2 Relationship between cut-off grade and mineral reserves Pilot questions 1.2 1. What is geological data, and why is it important in mine design? 2. Name two characteristics of mineral deposits that influence mine design. 3. Define grade in the context of mineral deposits. 4. What is meant by cut-off grade? 5. How does mineral modelling assist in underground mine design? 1.3 Selection Of Mining Methods 1.3.1 Criteria for choosing underground mining methods Mining method selection is the process of determining the most suitable technique for extracting a mineral deposit. The choice depends on several criteria such as deposit geometry, depth, grade, rock strength, and economic considerations. For instance, a shallow, horizontal deposit may be mined using room-and-pillar methods, while a deep, narrow vein may require cut-and-fill techniques. The decision is critical because it influences safety, cost, and ore recovery. Selecting the wrong method can lead to excessive dilution, unsafe conditions, or uneconomical operations.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Fill in the blank: The process of determining the most suitable technique for extracting a mineral deposit is called _______ selection. Diagram comparing different underground mining methods (room-and-pillar, cut-and-fill, block caving). Caption: Figure 1.3 Comparison of underground mining methods 1.3.2 Machinery and equipment considerations Machinery and equipment in underground mining refer to the specialised tools and machines used for excavation, haulage, support, and ventilation. The choice of equipment depends on the mining method selected. For example, room-and-pillar mining often uses continuous miners, while cut-and-fill may rely on load-haul-dump (LHD) machines. The efficiency of equipment directly affects productivity and cost. Proper selection ensures that ore is extracted safely and efficiently, while poor selection may result in delays, accidents, or increased expenses. Fill in the blank: In cut-and-fill mining, ore is often moved using _______ machines.
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