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E-17
VOLUME 2
Chapter VI
MINING TECHNOLOGY
by
George B. Griswold
TABLE OF CONTENTS
OUTLINE OF MINING IN THE CARLSBAD POTASH DISTRICT
VI-I
The early years
VI-I
Current status ,..................................... VI-I
Carlsbad in relation to other producing areas
VI-2
Outlook for the future
VI-2
CURRENT MINING METHODS
VI-3
Conventional mining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VI-3
Continuous mining using drum miners
VI-4
Mineral processing , VI-5
ESTIMATION OF MINING, PROCESSING, AND CAPITAL COSTS
VI-5
4th ore zone .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VI-6
10th ore zone
VI-6
Market prices for products
VI-6
Estimate of capacity
VI-7
Estimate of development cost and time to bring into production . . . . . . . . VI-7
Historical trend of mining and processing cost versus market price
VI-7
ENGINEERING ECONOMIC EVALUATION OF POTASH RESERVES
Assignment of discount factor
CONCLUSIONS
Reserves within WIPP
Additional study area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combined study area
The effect of changes of mining and processing costs
VI-8
VI-8
VI-8
VI-9
VI-9
VI-9
FIGURES
Figure 1. Room & pillar mining . . . . . . . . . . . . . . . . . . . . . . . . .. VI-lO
Figure 2. Continuous mining . . . . . . . . . . . . . . . . . . . . . . . . . . .. VI-ll
Figure 3. Continuous mining with barrier pillars . . . . . . . . . .. VI-l2
Figure 4. Mineral processing for mixed ore . . . . . . .. VI-13
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