基于3DMine的断面法与距离幂次反比法对比  

Comparative study of 3DMine-based section method and inverse distance power ratio method

作　　者：景永波 杜菊民[1] 陈春生 陈诚 孙晨 Jing Yongbo;Du Jumin;Chen Chunsheng;Chen Cheng;Sun Chen(Jiangsu Geological Engineering Co.,Ltd.,Nanjing 210018,Jiangsu,China;Jiangsu Institute of Geology and Mineral Resources,Nanjing 210049,Jiangsu,China)

机构地区：[1]江苏省地质工程有限公司,江苏南京210018 [2]江苏省地质矿产调查研究所,江苏南京210049

出　　处：《地质学刊》2021年第3期271-276,共6页Journal of Geology

基　　金：江苏省地质勘查专项资金项目“坦桑尼亚林迪地区纳钦圭阿石墨矿预查”(苏财建〔2018〕96号);江苏省省外、国外矿产资源风险勘查专项资金项目“坦桑尼亚林迪地区纳钦圭阿石墨矿普查”(苏矿地发〔2019〕139号)。

摘　　要：以坦桑尼亚纳钦圭阿大型晶质石墨矿南部矿体为研究对象,基于3DMine软件平台,通过垂直断面法、距离幂次反比法进行资源量估算,对比研究2种资源量估算方法在矿体的体积、品位、资源量方面的区别。结果表明:2种估算方法体积相对误差为6.30%,品位相对误差为1.45%,资源量结果相对误差为7.83%,资源量验算结果在误差范围之内;3DMine中的断面法计算过程自动、准确、高效,利用三维模型体积替代传统公式计算体积,计算结果更加精准;采用距离幂次反比法时,运用三维模型计算矿体体积,用全局验证和交叉验证对搜索椭球体参数的合理性进行验证,最终选择最优搜索椭球体参数,是进行资源量准确估算的关键。综上所述,用距离幂次反比法估算的资源量结果更加准确,计算过程高效、便捷,并可为后期矿山数字化建设提供基础,是今后矿山发展的趋势。Based on the 3 DMine platform, the resources of the southern orebody of a large-scale crystalline graphite mine in Nachingwea, Tanzania, are estimated by the vertical section method and the inverse distance-power ratio method, and the differences between the two methods in volume, grade and quantity of ore body are compared. The results show that the relative error of volume, grade and resource quantity are 6.30%, 1.45% and 7.83%, respectively. The result of resource quantity is within the error range. The section method in 3 DMine is automatic, accurate and efficient. Using the 3 D model volume instead of the traditional formula to calculate can make the result more accurate. When the inverse distance-power method is used, the volume of orebody is calculated by three-dimensional model, the rationality of searching ellipsoid parameters is verified by global verification and cross verification, and finally the optimal searching ellipsoid parameters are selected, which is the key to accurate resource estimation. To sum up, it is accurate, efficient and convenient to use the method of inverse ratio of distance to power to estimate the quantity of resources. It can provide the foundation for the later mine digital construction, which is the trend of the future mine development.

关 键 词：3DMine软件 三维地质模型 断面法 距离幂次反比法 晶质石墨矿 坦桑尼亚纳钦圭阿 

分 类 号：P619.252[天文地球—矿床学] P624.7[天文地球—地质学]