In the numerical study of groundwater seep characteristics in rock mass under different rock dip angles, the influence of seep field on internal defects such as holes and joints, the influence of seep field on rock mass stability, and the instability mechanism of rock mass under the coupling of seep field and ground stress field were seldom considered. This study employed discrete element software (PFC) to define fluid domains, simulating fluid-solid coupling evolution and rock mass failure behavior under coupled geostress and seepage fields. Macroscopic and microscopic analyses were conducted to investigate instability mechanisms. The results indicate that the coupling of high-stress fields and low-seepage fields can induce crack propagation in weak zones, such as crack tips, leading to rock mass failure. Compared to stress fields alone, coupling effects exhibit distinct failure patterns. Additionally, under low water pressure, seepage pressure can suppress tensile crack propagation at crack tips, primarily resulting in compressive failure zones. This research provides theoretical insights for understanding seepage behavior and assessing rock mass stability in complex engineering conditions.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |