To investigate the mechanical response of argillaceous weathered dolomite and its effect on engineering stability, the weathered dolomite from a mining area was taken for research. Laboratory tests including uniaxial compression, uniaxial splitting and conventional triaxial compression were carried out to systematically analyze its mechanical properties and failure modes under different stress paths. The results show that: Compared with non-argillaceous weathered dolomite, the compressive strength and tensile strength of argillaceous weathered dolomite decrease significantly, while the deformation capacity is enhanced; the compressive strength of weathered dolomite decreases obviously under water-bearing conditions, and argillaceous weathered dolomite is more sensitive to water; in triaxial compression tests, the increase of confining pressure can effectively improve the strength and toughness of rock; argillaceous weathered dolomite is prone to plastic deformation and shear failure, whereas non-argillaceous weathered dolomite tends to brittle failure under high confining pressure.
| 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 |