Geoscience Reference
In-Depth Information
Load model itself for Bench 2400, respectively. Observe
how both models share the same general spatial distribution
and trends, imposed by the variograms of the OXSI/OXSA
and SNSI/SNSA indicators and the corresponding Point
Load, respectively.
Carga Puntual, OXSA
Number of Data 188
number trimmed1498
mean 0.7619
std. dev. 0.6127
coef. of var0.8042
maximum4.0600
90th quantile 1.6000
upper quartile 0.9385
median 0.6100
lower quartile 0.3400
10th quantile 0.2700
minimum0.0500
0.300
0.200
14.1.27
Resource Model Calibration
0.100
Resource Model calibration of the estimation process is
intended to reproduce, as closely as possible, past produc-
tion data. In this sense, it is a form of cross validation, since
“known” values are used as reference to improve the resource
model. The reference is a block model obtained from blast
hole information for a pre-determined production period.
A calibration volume was established based on a surface
approximately 80 m above the current topography (as of
01/31/03). Blocks corresponding to extraction periods from
02/01/02 through 01/31/03 were flagged from available tri-
angulations. Thus, all blocks within the calibration model
could be identified by month, year, and within the calibra-
tion volume.
The calibration volume was estimated using only the
10 m drill hole composites (no blast hole data) and kriging
plans defined previously. Estimation “errors” were obtained
0.000
0.00
1.00
2.00
3.00
4.00
IS_50
Fig. 14.25 Histogram and basic statistics, Point Load, OXSA
1. OXSI should not have Point Load values less than 0.8.
2. OXSA should not have Point Load values greater than
1.3.
3. SNSI should not have Point Load values less than 0.9.
4. SNSA should not have Point Load values greater than 1.0.
Figures 14.26 and 14.27 show the GMU final model (after
correction for the estimated Point Load values) and Point
Fig. 14.26 GMU final model, Bench 2400m
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