Research on Distribution Regulation of Phosphorus Resources in CaojiagouTailings Reservoir of Haikou Phosphate Mine,Yunnan Province
There are abundant'secondary resources'in the tailings discharged from mining and bene-ficiation.With the increasing demand for mineral resources,the recovery and reuse of tailings associated re-sources has become a research hotspot.In order to find out the distribution law of mineral elements and re-source reserves in Caojiagou tailings reservoir of Haikou Phosphate Mine,based on detailed field geological survey and drilling engineering exposure,the potential economic value of Caojiagou tailings reservoir was evaluated by DIMINE three-dimensional mining software.The results show that:The content of phosphorus in tailings has a certain stratification phenomenon with the change of depth,showing a significant'secondary enrichment'phenomenon,showing good industrial utilization potential.Based on the systematic collation of laboratory data,the geological database of Caojiagou tailings reservoir was constructed.It was concluded that the grade of P2O5 in tailings was normally distributed,with an average grade of 11.23%.On the plane,the tail-ings resources are fan-shaped from the discharge port to the outside,and the grade of phosphate rock gradu-ally decreases from the discharge port to the center of the dam area,showing significant strata control in the vertical direction.The P2O5 grade is used as a regionalized variable to construct a variogram model.The analy-sis shows that the enrichment law of P2O5 grade in the plane is more significant than that in the vertical direc-tion,and the distance power inverse ratio method is used to estimate the tailings in the reservoir area.The amount of ore is 1.186 3 million tons,which has the potential for resource recovery and reuse.
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