基于多元线性回归方法的中咀铜矿体体重修正

Correction of the volumetric weight of Zhongzui copper orebody based on multiple linear regression

中咀铜矿位于四川省甘孜州九龙县,为一中型铜-锌硫化物矿床。根据先前小体重测试发现,采用算术平均法求得的体重明显偏高。相关性分析结果表明体重倒数与矿石Cu、S品位具有非常显著的线性相关关系。采用多元线性回归方法建立体重倒数与Cu、S品位之间的回归方程,并利用化学分析结果计算出矿体的平均体重。实践表明,优化体重采样方法,选取合理参数建立回归方程,可以获得较为准确的矿体体重,从而极大提升资源量估算的精度。

The Zhongzui copper deposit is located in Jiulong county,Ganzi Prefecture,Sichuan Province.It is a medium sized copper-zinc sulfide copper deposit.The arithmetic mean of volumetric weight samples is aberrantly high as indicated by previous experiences.Correlation analysis reveals a strong linear correlation between the inverse of volumetric weight and grades of Cu and S.Regression equation is established with the inverse of volumetric weight and grades,and average volumetric weight of orebody is calculated with grades of both elements.The optimization of sampling procedures and establishment of equation with proper parameters lay the foundation of obtaining a more accurate volumetric weight,which will improve the precision of resource estimation.