Dynamic behavior and micro–meso scale fracture mechanisms of sandstone under long-term water immersion
Xiaowei Gu, Chujian Han, Xiaochuan Xu, Jianan Wang, Zhenguo Zhu, Chao Li · 2025
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Description
Coal mines store water in underground reservoirs, and the sandstone around them soaks for months while still facing sudden impact loads. Xiaowei Gu and co-authors ask what that long soaking does to the rock under dynamic stress. They immersed sandstone for up to 180 days, imaging its pores with three tools, then struck it in a split Hopkinson bar, a device that delivers sharp, measured blows.
Soaking shrank the smallest pores and grew the mid-sized and large ones, as minerals dissolved and clays such as montmorillonite swelled and cracked the stone. Faster blows shattered the rock more and built more complex fracture webs. Longer soaking raised the share of cracks running between grains and made the crack pattern more intricate, until it leveled off. At the highest speeds, cracks instead cut through grains. The authors say these shifts matter for keeping mine reservoirs safe over their whole working life.
Catalog record
| CREATOR | Xiaowei Gu, Chujian Han, Xiaochuan Xu, Jianan Wang, Zhenguo Zhu, Chao Li |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 75 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |