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Questions and Answers
Classify surface mining based on extraction methods.
Classify surface mining based on extraction methods.
- Mechanical extraction (correct)
- Aqueous (correct)
- Geothermal
- None of the above
Classify surface mining based on equipment deployment.
Classify surface mining based on equipment deployment.
- Truck and shovel
- Buck wheel loader
- Dragline
- All of the above (correct)
What are 3 determinants of bench height in open pit mining?
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.
State 3 failure modes in surface mine design and potential areas they occur.
What are 3 determinants of equipment bench structural integrity?
What are 3 determinants of equipment bench structural integrity?
What are the determinants of the utilized hours for a production equipment?
What are the determinants of the utilized hours for a production equipment?
What are 3 determinants of production equipment procurement and retirement plan in surface mining?
What are 3 determinants of production equipment procurement and retirement plan in surface mining?
What are 3 determinants for temporary/permanent surface infrastructure in surface mining?
What are 3 determinants for temporary/permanent surface infrastructure in surface mining?
What are 3 types of stripping ratio?
What are 3 types of stripping ratio?
What are 3 elements of surface mine planning?
What are 3 elements of surface mine planning?
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Study Notes
Classification of Surface Mining
- 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
- 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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