Application of residual analysis in model validation for the Miaoling gold deposit in Song County,Henan Province
Residual analysis is a statistical technique utilized to assess the accuracy of a model by examining the disparity between the known value and the predicted value.Using the Miaoling gold deposit in Song County,Henan Province as a case study,this paper conducts a residual analysis on the ore block model to validate its accuracy and reliability.Firstly,the exploration engineering analysis data in the mining area were collected to establish a three-dimensional drillhole model,an ore body solid model,and a block model.Sec-ondly,initial validation of the ore body block model was conducted through methods such as profile observa-tion validation,overall distribution validation,and slice validation.Finally,the residual analysis method was employed to further verify the accuracy of the ore body block model.The residual analysis of the explo-ration engineering data and the block model revealed an average residual of-0.049X10-6,while the histo-gram exhibited a predominantly normal distribution,with the mean value closely aligned to the 50％cumula-tive distribution.It indicates a high level of accuracy and reliability of the ore body block model.Meanwhile,the mean of the residuals is negative,with a skewness coefficient of 0.231.The histogram shows a higher proportion of negative values,and the cumulative distribution does not exhibit a symmetrical distribution be-tween the 25％percentile of negative values and their corresponding positive values.The width of the distri-bution for negative values is greater than that for positive values,indicating that there are still deficiencies in the model's estimation.To further optimize the model,based on the spatial distribution characteristics of the exploration engineering samples,six different sets of estimation parameters have been set for experimenta-tion.The average residual,skewness coefficient,and histogram patterns have been compared respectively to achieve optimal modeling estimation parameters.
model verificationresidual analysisblock modelthe Miaoling gold deposit
万方数据
维普
