Questions and Answers
Classify surface mining based on extraction methods.
Classify surface mining based on equipment deployment.
What are 3 determinants of bench height in open pit mining?
Weather, Production economics, Pre-design constraints.
State 3 failure modes in surface mine design and potential areas they occur.
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What are 3 determinants of equipment bench structural integrity?
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What are the determinants of the utilized hours for a production equipment?
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What are 3 determinants of production equipment procurement and retirement plan in surface mining?
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What are 3 determinants for temporary/permanent surface infrastructure in surface mining?
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What are 3 types of stripping ratio?
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What are 3 elements of surface mine planning?
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Study Notes
Classification of Surface Mining
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Mechanical extraction methods include:
- Open pit mining, characterized by its large, terraced excavation.
- Strip mining, used for shallow coal and mineral deposits.
- Aqueous extraction method involves dredging, typically for minerals located underwater.
Equipment Deployment in Surface Mining
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Commonly used equipment includes:
- Truck and shovel, known for versatility and mobility.
- Buck wheel loader, efficient in bulk material handling.
- Dragline, suitable for large-scale excavation and removal of overburden.
Determinants of Bench Height in Open Pit Mining
- Bench height is influenced by:
- Weather conditions that can affect safety and operations.
- Production economics, which dictate the most cost-effective height for extraction.
- Pre-design constraints, including geological and environmental factors affecting mine layout.
Failure Modes in Surface Mine Design
- Common failure modes and their locations:
- Circular Arc failures typically occur at the top of the crest or overburden layers.
- Wedge/Plane shear failures are likely at failure planes and joint intersections, particularly in weathered hard rock.
- Toppling failures are prevalent on steep slopes and high walls.
Equipment Bench Structural Integrity Determinants
- Key factors influencing structural integrity include:
- Safety Factor, which ensures adequate design tolerance.
- Bench bearing capacity to support equipment weight and operations.
- Average stress from equipment during movement and operation.
Determinants of Utilized Hours for Production Equipment
- Equipment utilization is affected by:
- Availability of qualified operators who can effectively manage equipment.
- Weather conditions that can interrupt operations and affect safety.
- Maintenance schedules that ensure equipment functionality.
Production Equipment Procurement and Retirement Plan
- Key considerations in procurement and retirement include:
- Equipment meeting current production needs for efficiency.
- Resale value and overall lifespan, impacting financial returns on investment.
- Availability and utilization rates of existing equipment to optimize productivity.
Temporary/Permanent Surface Infrastructure Determinants
- Infrastructure decisions based on:
- Routes for hauling equipment, directly affecting logistics.
- Types of equipment being used that determine infrastructure design.
- Growth projections of the mine, influencing future infrastructure needs.
Types of Stripping Ratio
- Stripping ratios essential for evaluating mining efficiency:
- Tons per ton ratio, relating mined material to waste.
- Bank Cubic Yards (BCY) to BCY ratio, comparing excavated material.
- BCY to tons ratio, assessing volume against weight.
Elements of Surface Mine Planning
- Key planning elements include:
- Identification of the product being mined to guide operations.
- Safety protocols to protect workers and the environment.
- Selection of appropriate equipment tailored for extraction needs.
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Description
Test your knowledge on surface mining extraction methods and equipment with these flashcards. Learn to classify various techniques like open pit and strip mining, and understand factors influencing bench height. Perfect for students studying mining engineering or geology.
