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Outline
In order to reveal the deformation and failure laws of surrounding rock in jointed roadway under dynamic load, 3DEC software was used to simulate and analyze the influences of different burial depths, peak stresses, and load frequencies on the deformation and instability characteristics of surrounding rock in jointed roadway under blasting load in a certain mine. The results show that with the increase of blasting load disturbance time, the displacement of the roof, floor, and right wall of jointed roadway firstly increases, then decreases, and finally stabilizes. The displacement of the roadway surrounding rock increases linearly with the increase of burial depth and peak stress, and the plastic zone area of the roadway surrounding rock also increases accordingly. The deformation and failure degree of the roadway surrounding rock deepen, and the most serious location is on the floor.The displacement of the roadway surrounding rock decreases linearly with the increase of load frequency, and the area of the plastic zone around the roadway slightly decreases. The influences of three factors on the deformation of roadway surrounding rock were analyzed by response surface methodology. It was found that the burial depth had the most significant impact, followed by the peak stress, and the load frequency was the smallest. The research results can provide a theoretical guidance for mine safety production.
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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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