High-density Electrical Exploration Test of Hidden Fault Zone in Southern Rare Earth Mining Area
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摘要:
当下南方稀土矿的开采模式依旧为原地浸矿模式，这种开采模式而言，矿山地下发育的裂隙构造、地下暗河、岩溶等不良地质体，会严重降低浸矿液的回收率，同时沿不良地质体泄露的浸矿液对环境会造成严重污染，因此对矿山地下不良地质体的发育状态的调查具有重要的意义。本文针对南方某稀土矿C2矿区的地层分布及构造特征，首先开展高密度电法参数实验，选择合适的测量参数以及温纳-斯伦贝尔2装置测量模式，完成了4条测线的高密度电法测量；通过反演计算获得了实验区的隐伏电性结构模型，圈定了风化层（富含稀土矿的地层）厚度以及隐伏断裂构造的空间展布特征，解释结果与实验区布置的钻探结果一致。勘探成果对于离子性稀土矿储量评估、渗漏通道封堵及收液巷道的布置等提供了重要的参考资料。
Abstract:The current mining mode of rare earth mines in southern China is still the in-situ leaching mode. For this mining mode, the fractured structures, underground rivers, karst and other unfavorable geological bodies developed underground in the mine will seriously reduce the recovery rate of the leaching liquid. The leaching liquid leaking along the bad geological bodies will cause serious pollution to the environment, so it is of great significance to investigate the development status of the bad underground geological bodies in the mine. Based on the stratum distribution and structural characteristics of the C2 mining area of a rare earth mine in the south, this article first carried out high-density electrical method parameter experiments, selected appropriate measurement parameters and the Wenner-Schlumberg 2 device measurement mode, and completed the high-density of 4 survey lines Electrical measurement; the hidden electrical structure model of the study area is obtained through inversion calculation, the thickness of the weathered layer (stratum rich in rare earth minerals) and the spatial distribution characteristics of the hidden fault structure are delineated, the results are interpreted and the drilling of the study area layout The results are consistent. The exploration results provide important reference materials for the reserve evaluation of ionic rare earth ore, the plugging of seepage channels, and the layout of liquid collection roadways.
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表 1 矿区内各地质体物性参数
Table 1. Physical parameters of geological bodies in the mining area
序号 岩性与地层 测量点位/个 电阻率/（Ω·m-1） 备注 1 第四系砂质黏土 10 50~500 不同湿度差别较大 2 花岗岩风化层 12 300~800 含水不同差别较大 3 完整花岗基岩层 10 1000~10000 含水不同差别较大 4 断层破碎带 6 20~400 含水不同差别较大 
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