چكيده لاتين :
In order to determine the uncertain parameters in mining economics in
Iran, a computer software was developed in visual basic environment. This software
can evaluate the sensitivity of economic indicators to the variation of input
parameters. The results can be expressed graphically in terms of a spider diagram. In
order to examine the accuracy of the software, data from a coal mine, ZemestanYort,
in Golestan Province in North Eastern Iran was used and it was shown that the
selling price of commodity is the most influential variable in economic viability of
the operation. Even the smallest variation of this parameter can cause a pronounced
economic impact. A 10% decrease in selling price causes a 14% drop in rate of
return. In the other hand an increase of 10% in operating costs brings a 4.2%
decrease in rate of return where more labor cost, 10%, or 25% increase in mine life
did not show a considerable change in neither rate of return or net present value and
thus proved not to be economically vital.
