斑岩型矿床露天开采储量动态评估方法研究及应用

发布时间：2018-04-26 09:58

本文选题：资源/储量分类分级 + 地质可靠程度　；参考：《北京科技大学》2017年博士论文

【摘要】：资源/储量分类分级对于政府部门、地勘单位、矿山企业而言都十分重要。储量评估是一个复杂的动态过程,贯穿于矿床发现、开发直至闭坑的整个生命周期,对储量动态评估理论、方法、关键技术的研究具有重要意义。论文以斑岩型露天矿为研究对象,采用理论分析与实例分析相结合的方法,从地质可靠程度和经济性两个维度对资源/储量分类分级体系进行了全面剖析,主要完成了以下工作:(1)针对斑岩型及类似矿床的特点,建立了一套从资源量估算到储量升级再到模型动态更新的露天矿储量动态评估方法体系。该体系结构清晰、可操作性强,适用于品位渐变、矿岩界限模糊的露天矿。(2)基于三维矿业软件的资源量估算关键技术研究和算法实现。研究并实现了基于RBF函数和MC算法的矿体模型构建、变椭球搜索算法、MSP算法及优化等关键技术,对资源量估算的效率和估计精度有较大提高,提升了国产软件资源量估算水平,缩小了与国际先进矿业软件之间的差距。(3)研究将资源地质可靠程度评价分为整体和局部两个层次,基于地质统计学、块体模型和计算机技术,针对整体评价和局部评价的不同特点,分别从评价单元、资源量估算手段、估值精度影响因素等方面深入分析,提出了量化评价指标,为完善资源分级体系奠定了基础。(4)在保留经济、可行性、地质(EFG)三轴分类框架的基础上,重新构建了斑岩型露天矿资源/储量分类分级体系,形成了一个三大类13个类型三轴4代码的资源/储量分类分级系统。研究成果能够与国际接轨又不失我国特色,在国家矿产资源管理及矿山企业生产管理中都具有重要意义。(5)阐述了不同条件下,露天矿资源/储量估算模型动态更新的调整机制。论证了露天矿最终境界是资源整体经济性的宏观体现;选别开采单元块净价值是资源局部经济性的衡量标准;边际品位适时调整是对价格、成本、矿山地质条件的动态响应,是露天矿经济、管理、决策的核心内容。(6)选取有代表性的斑岩型矿床对研究成果进行了应用验证。结果表明,本研究所建立的储量动态评估体系具有较强的实用性,提高了资源/储量估算的准确性和时效性,对资源评估和矿山生产都有指导意义,有推广应用价值。
[Abstract]:Classification of resources / reserves is very important for government departments, geological prospecting units and mining enterprises. Reserves assessment is a complex dynamic process, which runs through the whole life cycle of ore deposit discovery, development and closing pit. It is of great significance to study the theory, method and key technology of reserves dynamic evaluation. Taking porphyry opencast mine as the research object, this paper comprehensively analyzes the classification and classification system of resources / reserves from the two dimensions of geological reliability and economy by combining theoretical analysis with practical analysis. According to the characteristics of porphyry type and similar deposits, a set of dynamic evaluation method system of opencast reserves is established from resource estimation to reserve upgrading to dynamic updating of model. This system has the advantages of clear structure, strong maneuverability, suitable for open-pit mine with gradation grade and fuzzy boundary of ore and rock.) based on 3D mining software, the key technology of resource estimation is studied and realized. This paper studies and realizes the key technologies of ore body model construction based on RBF function and MC algorithm, variable ellipsoid search algorithm and optimization, etc. The efficiency and precision of resource estimation are greatly improved, and the level of domestic software resource estimation is improved. The research divides the evaluation of geological reliability of resources into two levels: integral and local, based on geostatistics, block model and computer technology. According to the different characteristics of the whole evaluation and the local evaluation, the quantitative evaluation index is put forward from the aspects of the evaluation unit, the means of estimating the resource quantity and the factors affecting the estimation accuracy. In order to improve the classification system of resources, the classification and classification system of resources / reserves of porphyry opencast mines has been re-constructed on the basis of preserving the economic, feasible and geological EFG triaxial classification framework. A resource / reserve classification system with 13 types, 3 axes and 4 codes is formed. The research results are of great significance in national mineral resource management and mine enterprise production management, and the adjustment mechanism of dynamic updating of open-pit mine resource / reserve estimation model under different conditions is expounded. It is demonstrated that the ultimate boundary of open-pit mine is the macroscopic embodiment of the overall economy of resources, the net value of the selected mining unit is the standard of measuring the local economy of resources, and the timely adjustment of marginal grade is the dynamic response to the price, cost and geological conditions of the mine. It is the core content of open pit mine economy, management and decision-making. The representative porphyry deposit is selected to verify the application of the research results. The results show that the reserve dynamic evaluation system established in this paper has strong practicability, improves the accuracy and timeliness of resource / reserve estimation, has guiding significance for resource evaluation and mine production, and is worth popularizing and applying.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TD804

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