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16.4 P RODUCTION S CHDULE
Using Pit Shell 26 in Gemcom Whittle , a preliminary mine production was
developed and then smoothed for equipment utilization. The main goals for the
production schedule were to minimize the mining of waste, and maximize the grades
while satisfying mill capacity. Table 16.5 shows the criteria that was used in the
preliminary production schedule.
Table 16.5 Inputs for Production Schedule
Item Value
Pre-production 1 a
Ramp up period for mill 1 a
Maximum mill capacity 11,200,000 t/a
Maximum mill capacity 32,000 t/d
Working days in year 350 d
Maximum mining capacity 53,000,000 t/a
Figure 16.4 shows the amount of mineralized material (blue) and waste (red) mined
per year for the period of mine life. Five million tonnes of waste must be mined as
pre-stripping in Year -1, while the mill is constructed and prepared for
commissioning. In Year 1 , the mill will process up to 5 Mt of mineralized material.
Year 37, the final year of production, will be an incomplete year.
For first 20 years of operation, the mining capacity will stay at approximately 30 Mt
and then gradually increase to 52 Mt in Year 22. Table 16.6 shows the mine
production schedule by year for the LOM.
Figure 16.4 Mine Production Schedule
Prophecy Platinum Corp. 16-10 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada