The Application of Geostatistics to Ore Reserve Calculation of the Yangla Copper Deposit
地质统计学在羊拉铜矿储量计算中的应用

With Surpac software.this paper established a geological database for the Yangla copper deposit.The experimental variation function was calculated in three directions(thickness,dip and strike).Through employing the method of geostatistics,making an analysis of the copper grade of the 5th ore body,and conducting curve fitting of the theoretical variable function.the authors established a mathematical model for the Yangla ore deposit.On such a basis,the reserves were calculated by using the Kriging and the inverse square distance methods.In combination with the statistics of reserves calculated by the traditional block method,the three methods were compared with each other.The impact factors of the three methods and the fundamental causes for their errors were discussed.It is found that the Kriging method for reserves calculation is the most advanced and applicable means.This paper has also analyzed the copper grade-tonnage curves for the ore body,and the result can provide a reliable theoretical basis for reasonable determination of economic grade and tonnage in the mine.