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用地質雷達探測廢棄礦井

发布日期：2025-07-22 10:59:57 作者：揚塵檢測儀來源：揚塵監測系統浏覽量：445

在矿产资源开发历史较长的地区，大量未登记或记录不全的废弃矿井隐藏地下，对工程建设和地质安全构成潜在威胁。在乱采滥挖严重的矿区，这些隐患非常突出，查明采空巷道的分布范围及埋深成为保障工程安全的关键，地质雷达技术为此提供了可靠解決方案。

地质雷达是20世纪70年代发展的广谱电磁法，以经济、无损、快速直观的特点成为浅部地球物理勘察的主要工具。其原理与探空雷达相似，通过一对天线工作：发射天线发射高频电磁脉冲波，遇到地下物性分界面（如矿井边界）时发生反射，接收天线捕获反射信号，记录振幅和旅行时间。沿测线移动天线可形成雷达剖面，当波速已知时，按公式 z=(vt)/2（z 为深度，v 为波速，t 为时间）可反推反射体深度。

廢棄礦井改變了地下介質物理性質，巷道的空氣、空洞或充填物與周圍岩體在介電常數、電導率上有差異。這種電磁性差異不僅引發電磁波反射，還導致衰減和相位變化，爲識別礦井提供了物理基礎。

不過探測需規範操作：先收集地質和采礦曆史資料，確定礦井可能深度走向。探測時發射與接收天線沿測線同步移動，間距依目標深度選擇，深度越大間距越大。數據采集需保持天線平穩，記錄測線位置和地形變化，複雜區域采用多測線交叉探測提高精度。

原始數據經處理後，根據雷達剖面的反射波同相軸特征、能量衰減和相位變化，可精准判斷礦井位置和形狀。

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