9 Questions
What are the most important variables among the natural and geologic factors in the planning and development of a surface mine?
Terrain, depth, spatial characteristics of the deposit, and presence of water
Which factor is more critical in surface operations than in underground mines?
Climate
What is considered among the most important considerations in the planning and development of a surface mine?
Environmental concerns and the costs of overcoming environmental problems
Which factors can be detrimental to efficient and cost-effective operation in surface mining?
Harsh climates at high altitudes or in northern latitudes
What is the Oxygen Balance (OB) for 1 kg of a high explosive with the following composition: 80% TNT, 10% AN (Ammonium Nitrate), and 10% Sodium nitrate?
-29.5
What is the average tonnage of waste required to produce a ton of ore in surface coal mining?
15
What is the proportion of ore and total material tonnage produced in surface mines according to Table 6.2?
12% ore, 88% total material
What change in composition would you suggest to improve the Oxygen Balance (OB) of a high explosive mixture with regard to oxygen?
Increase the proportion of oxidizers
What does the sheer magnitude of volume or tonnage of material broken and handled in surface mining indicate?
Extensive scale of operations
Study Notes
Natural and Geologic Factors in Surface Mine Planning
- Natural and geologic factors are crucial in planning and developing a surface mine.
- These factors include topography, geology, hydrology, and climate.
Critical Factors in Surface Operations
- Geology is more critical in surface operations than in underground mines.
Key Considerations in Surface Mine Planning
- One of the most important considerations in planning and developing a surface mine is the geologic factors.
Detrimental Factors in Surface Mining
- Inefficient geologic factors can be detrimental to efficient and cost-effective operation in surface mining.
Oxygen Balance of High Explosive
- The Oxygen Balance (OB) for 1 kg of a high explosive with the composition 80% TNT, 10% AN, and 10% Sodium nitrate needs to be calculated.
Surface Coal Mining
- On average, around 4-5 tons of waste are required to produce a ton of ore in surface coal mining.
- According to Table 6.2, the proportion of ore and total material tonnage produced in surface mines is around 1:4-1:5.
Improving Oxygen Balance
- To improve the Oxygen Balance (OB) of a high explosive mixture, increasing the percentage of AN and decreasing the percentage of TNT would be suggested.
Surface Mining Operations
- The sheer magnitude of volume or tonnage of material broken and handled in surface mining indicates the complexity and scale of the operation.
Learn about the crucial steps involved in the planning and development of surface mines, with a focus on the factors that require special attention and the impact of climate on efficient operation.
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