基于优势结构面的离子型稀土矿床节理构造研究

Research on the Joint Structure of Ionic Rare Earth Deposits Based on the Dominant Structure Plane

本研究以南方某离子型稀土矿为样本,通过对矿区花岗岩节理进行现场调查与统计分析,绘制了花岗岩节理走向玫瑰图、倾向玫瑰图、等密度图和倾角分布直方图,找出了花岗岩节理的分布规律,确定了花岗岩体的两组优势结构面方位。首次将花岗岩体的优势结构面应用于离子型稀土矿的开采中,利用花岗岩体优势结构面方位科学布置物探线,从而合理布置集液巷道。同时,采用岩体体积节理数的统计方法计算岩体的RQD值,对离子型稀土含矿花岗岩体的稳定性进行评价,结合优势结构面来预防原地浸矿可能诱发的山体滑坡。本研究成果对构建资源节约型、环境友好型离子型稀土矿山开发具有重要意义。

In this study, an ion-type rare earth ore in the south was used as a sample. Through the on-site investigation and statistical analysis of the granite joints in the mining area, the granite joint trend rose diagram, the tendency rose diagram, the iso-density map and the dip distribution histogram were drawn, and the granite joints were found. The distribution law determines the two dominant structural plane orientations of the granite body. For the first time, the dominant structural plane of the granite body was applied to the mining of ionic rare earth ore, and the geophysical exploration line was scientifically arranged using the dominant structural plane orientation of the granite body, so as to rationally arrange the liquid collection roadway. At the same time, the RQD value of the rock mass is calculated by the statistical method of rock mass joint number, and the stability of the ionic rare earth ore-bearing granite body is evaluated, and the dominant structural plane is combined to prevent the landslide that may be induced by in-situ leaching. The research results are of great significance for the construction of resource-saving and environment-friendly ionic rare earth mines.