钨矿床三维建模和储量可视化计算

Visible Modeling and Estimation of Reserves for Tungsten Deposit

利用国际矿山软件Surpac对新田岭钨矿建立地质数据库、三维实体模型和块体模型,实现地表、断层、地层和矿体的地下三维可视化。根据地质统计学原理对钻孔样品数据进行组合分析,通过对三维变异函数的计算和拟合,构造出一个变异函数模型,对全部有效结构信息做出定量概括。分别采用普通克立格法和距离反比法对矿体金属元素品位进行了估值和储量统计,并将计算结果与矿山通过实际勘探运用的块体法储量计算的结果进行了对比分析。实践表明,三维建模可视化可以完整准确地表达出矿山地表、地下地质构造的空间位置关系以及相关矿岩信息,同时为矿床开采以及生产动态管理提供有效基础。所建模型和品位推估、储量计算结果可靠,可用于辅助矿山进行资源评估,这不仅促进了传统采矿手段的发展,也将对中国矿山企业的数字化进程起到巨大的推动作用。

Using the mine software Surpac to set up the geological database, the 3D model of orebody and the block model of orebody, the visualization is realized for the three dimensional models of surface, fault, stratum, and orebody. The data of borehole samples are combined and analyzed according to geological data. Through the three-dimensional variogram calculation and fitting, a variogram model is constructed. All information on the effective structure is summarized quantitatively. The ordinary Krigemethod and the distance power inverse ratio-method are used to analyze and estimate the orebody grade and reserves. The evaluation results of these two methods are analyzed and compared with the calculation results of the traditional geological block method. It is shown that the mine surface and the underground geological structure of the spatial relations and relevant ore-rock information can be completely and accurately displayed by the visualization of three dimensional models. At the same time an effective basis can be provided for the deposit exploitation and dynamic management of production. The 3D model established for the deposit and the estimation method of grade and reserves measurement is reliable and useful for the study of reserve estimation. It not only helps the development of traditional mining methods, but also plays an important role in the digitized process of the mine enterprises in China.