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Through the true triaxial loading-disturbance tests of granite with different structural planes, the acoustic emission system was used to monitor the rock failure process, and the failure characteristics and acoustic emission evolution characteristics of rocks with different structural planes were explored. The relationship between structural surface parameters and rock sample failure outcomes was analyzed, and macroscopic and microscopic differences of the three failure results were compared. The results are concluded as follows. (1) When the length of the structural plane is 20 mm and 30 mm, the rock sample is prone to crack-induced failure. When the length of the structural plane is 50 mm, the rock sample is prone to rockburst. With the increase of the length and dip angle of the structural plane, the failure of the rock sample tends to change from shear failure to internal shear and external splitting. When the length of the structural plane is short, the dip angle has a weak influence on the failure mode of the rock sample. Structural plane grouting will weaken the intensity of rock failure. (2) The proportion of tensile and shear areas in RA-AF density diagram of rock samples with three kinds of failure results is different. (3) With different structural plane parameters, the crack distribution and amplitude exhibit significant differences in the upper, middle, and lower positions of the rock sample's structural plane. (4) Based on the analysis of the variation characteristics of the coefficient of variation CV(r) of b value and r value, it is found that there are significant differences between the formation of shear cracks and tensile cracks in granite with different structural plane parameters under dynamic disturbance. This study can provide theoretical guidance for the prevention and control of mining-induced disasters in deep rock mass with structural planes.
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| 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 |
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