International Journal of Coal Science & Technology· 2026Q1
Effects of water intrusion on fracture characteristics of hard coal
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- Q1SCImago
- 2026year
Short summary
Hard coal retains its brittle failure mode even after water infusion, according to quasi-static loading tests and fluid-solid numerical simulations.
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Key points
- Hard coal maintains a brittle failure mode despite water infusion.
- Quasi-static loading tests were used to study water's effect on coal fracture characteristics.
- Acoustic emission (AE) systems monitored damage evolution and energy release.
- A coupled fluid-solid numerical model (PFC software) simulated water-coal interaction and energy evolution.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Aquifer water can cause serious geological hazards by catastrophically rushing into underground space. The water seepage can increase the moisture content and pore pressure of coal/rock, which can change mechanical behaviour of coal/rock subject to tectonic and abutment stress. Understanding the effect of water intrusion on physical and mechanical properties of coal is the critical research question for safe utilization of deep coal seams under the complex geological conditions. In this paper, the effects of water intrusion on fracture characteristics of coal samples taken from a typical deep coal seam are experimentally studied by quasi-static loading tests. Analytical tools such as AE system is used to continuously log acoustic events and associated energy release for the duration of the experiments to reflect the damage evolution and crack propagation. A coupled fluid–solid numerical model, using PFC software, is developed to simulate the water-coal interaction process for reflecting the energy evolution during loading process of coal samples with or without water soaking. It was determined by this research that hard coal will remain its brittle failure mode even after water infusion.
The authors' abstract, as published at the source. International Journal of Coal Science & Technology, 2026 · DOI ↗
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Mechanics of MaterialsEngineering