When brittle porous media interact with chemically active fluids, they may suddenly crumble. This has reportedly triggered the collapse of rockfill dams, sinkholes, and ice shelves. To study this problem, we use a surrogate experiment for the effect of fluid on rocks and ice involving a column of puffed rice partially soaked in a reservoir of liquid under constant pressure. We disclose localized crushing collapse in the unsaturated region that produces incremental global compaction and loud audible beats. These "ricequakes" repeat perpetually during the experiments and propagate upward through the material. The delay time between consecutive quakes grows linearly with time and is accompanied by creep motion. All those new observations can be explained using a simple chemomechanical model of capillary-driven crushing steps progressing through the micropores.

中文翻译：

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在部分浸透的脆性多孔介质中用地震追踪时间。

当脆性多孔介质与化学活性流体相互作用时，它们可能突然崩溃。据报道，这引发了堆石坝，污水坑和冰架的倒塌。为了研究此问题，我们使用替代实验来研究流体对岩石和冰的影响，其中涉及一列膨化米的部分浸泡在恒压下的液体储层中。我们公开了在非饱和区域发生的局部压溃塌陷，产生了逐渐增大的整体压实度和响亮的节拍。这些“等值线”在实验过程中不断重复，并向上传播通过材料。连续地震之间的延迟时间随时间线性增长，并伴有蠕变运动。