南非BISHOP锰矿区工程水文地质及矿体结构特征研究

Research on hydrogeology and ore body structure characteristics of BISHOP Manganese Mine Area in South Africa

南非作为世界五大矿产资源国之一,矿产资源丰富多样,特别是锰矿资源在全球具有重要地位。BISHOP锰矿区作为Postmasburg锰矿田的重要组成部分,其工程水文地质及矿体结构特征研究对于科学规划、合理开采及环境保护具有重要意义。本文在系统分析Postmasburg锰矿田区域地质概况的基础上,对BISHOP锰矿区的工程水文地质结构特征进行了系统的分析,最后对该矿区矿产资源的赋存特征、开采条件、矿石结构与构造进行了分析。分析结果表明:BISHOP锰矿区区域稳定性较好,矿床工程地质条件属层状岩类中等类型,矿区水文地质条件属简单类型;矿床为海底喷气成因;矿石结构主要有半自形晶粒状结构、隐晶-微晶结构、自形粒状变晶结构、它形粒状结构、砾屑结构等;矿石构造主要有条带状构造、纹层状构造、块状构造、多孔状构造、晶洞构造和角砾状构造等。研究结果为BISHOP锰矿区制定科学合理的开采方案提供基础地质数据和理论依据。

South Africa,as one of the world’s five major mineral resource countries,has abundant and diverse mineral resources,especially manganese ore resources,which play an important role in the world.The BISHOP manganese ore field,as an important component of the Postmasburg manganese ore field,has significant implications for scientific planning,rational mining,and environmental protection through the study of its engineering hydrogeology and ore body structural characteristics.Based on the systematic analysis of the geological overview of the Postmasburg manganese ore field,this paper systematically analyzes the engineering hydrogeological structural characteristics of the BISHOP manganese ore area.Finally,the occurrence characteristics,mining conditions,ore structure and structure of the mineral resources in the mining area are analyzed.The analysis results indicate that the BISHOP manganese mining area has good regional stability,and the engineering geological conditions of the deposit belong to the medium type of layered rocks.The hydrogeological conditions of the mining area belong to the simple type;the deposit is of submarine jet origin;the ore structure mainly includes semi automorphic grain structure,cryptocrystalline microcrystalline structure,automorphic granular structure,xenomorphic granular structure,gravel structure,etc;the ore structures mainly include banded structures,laminated structures,blocky structures,porous structures,crystal cave structures,and angular gravel structures.The research results provide basic geological data and theoretical basis for the development of a scientific and reasonable mining plan in the BISHOP manganese ore area.