云南海口磷矿曹家沟尾矿库磷资源分布规律*

源的回收再利用成为研究热点。为查明海口磷矿曹家沟尾矿库矿物元素分布规律及资

源储量，基于详实的野外地质调查及钻探工程揭露，借助DIMINE三维矿业软件对其潜在经济价值进

行评价。结果表明：①尾矿中磷元素含量随深度变化均存在一定分层现象，表现出显著的“二次富

集”现象，呈现较好的工业利用潜力；②在系统整理化验数据的基础上，构建了曹家沟尾矿库地质数

据库，得出尾矿中 P2O5品位呈正态分布，平均品位 11.23%；③在平面上，尾砂资源从排放口往外呈扇

形堆积，磷矿品位自排放口至坝区中央逐渐降低，垂向上显示出显著的层控性；④将P2O5品位作为区

域化变量构建了变异函数模型，分析认为 P2O5品位在平面上的富集规律较垂向上更为显著，并利用

距离幂次反比法估算得出库区尾砂矿石量为118.63万t，具备资源回收再利用潜力。

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.

1. Kunming Prospecting Design Institute of China Nonferrous Metal Industry Co., Ltd.; 2. Key Laboratory

of Geotechnical Engineering and Geological Disaster of Yunnan Province; 3. Yunnan Phosphate Group

Haikou Phosphorus Industry Co., Ltd.

摘要：