SUMMARY Water migration within the rock mass during a fire has not yet been studied. Here, an innovative high-resolution micro-ERT method is developed at a centimetric scale to measure this phenomenon. The method is two-step based: first, a correction of the electrode effect, and second, the correction of resistivity for rapid variations in temperature with high values. Water migration is successfully described within the wall of an underground limestone quarry with three phases: from fire ignition to 36 min, the surface dries to a 3-cm depth and a higher saturated layer forms deeper than 0.10 m; from 36 min to 46 min (fire supply stops), the rock dries out and water migrates from deeper parts of the rock wall, deeper than 20 cm, towards the surface; finally, after fire extinction, the water migrates through a readjustment phase until it returns to its initial state.

中文翻译：

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ERT 监测的火加热石灰岩廊道中的水饱和度变化

总结 尚未研究火灾期间岩体内的水迁移。在这里，开发了一种创新的高分辨率微型 ERT 方法，以厘米级测量这种现象。该方法是基于两步的：首先，电极效应的校正，以及第二，高值温度快速变化的电阻率校正。成功描述了地下石灰石采石场墙内的水迁移，分为三个阶段：从火点燃到 36 分钟，地表干燥至 3 cm 深度，在深度超过 0.10 m 时形成更高的饱和层；从 36 分钟到 46 分钟（停火），岩石变干，水从岩壁较深的部分（深度超过 20 厘米）向地表迁移；终于，大火扑灭后，