Fracture characteristics and failure mechanisms of coal-rock composites under complex true triaxial stress paths
Chenyang Zhang, Yang Hao, Hongyuan Ma, Yiqun Zhang, Farun Li, Quanfu Liu · 2026
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Description
Chenyang Zhang tests how layered coal and rock blocks break under realistic three-direction stress and unloading in deep mine roadways. Published in 2026, the laboratory program squeezes 100-millimeter cubes at five coal-to-rock ratios while listening for cracking sounds and running matching computer simulations. Excavation-style unloading and different layer thicknesses drive the comparison.
As coal share rose, failure shifted from steady splitting and shearing in rock-heavy blocks to sudden coal-driven collapse. Middle mixes failed in X-shaped shear patterns governed by the layer interface, and they crackled with warning signals during unloading more strongly than pure materials. Stored energy peaked at a 67 percent coal share even while peak strength kept falling. Burst danger therefore follows energy storage more than strength alone, a distinction mine engineers should design around.
Catalog record
| CREATOR | Chenyang Zhang, Yang Hao, Hongyuan Ma, Yiqun Zhang, Farun Li, Quanfu Liu |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 67194 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |