Surface Mining Flashcards
A broad category of mining in which soil and rock overlying the material are removed. Most of the world’s mines are performed in large-scale operations.
Surface Mining
The cost to mine a ton of material in surface mines must be ______than that for underground mines.
Lower due to waste associated
Of all location factors to be considered, ______ is the critical concern
Climate
The geometry of the mineral deposit, overburden, and the planned production rate dictate the __________ that must be done to maintain the desired rate of extraction.
Minimum amount of stripping
It follows the rule of stripping only as much as required for production. This is optimal in terms of the cash flow if other variables do not significantly enter the picture.
Increasing Stripping Ratio Method
If deposit doesn’t outcrop, _______ is required before production can begin.
Advanced Stripping
Certain amount of ore should ____________ so production scheduling is not constrained by the lack of ore
Always be Available for Mining
One must maintain at least ______ supply of broken ore available for loading equipment.
30 day
It is an important element of the mine since the income generated during the first years of operation is more apt to make or break the mine than the economics of the long-term mine plan.
Initial Cash Flow
It will result from the evaluation of many possible pit limits usually by solving the maximum allowable stripping ratio.
Long Range Mine Planning
