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To improve the emergency evacuation ability of miners, simulation models of roadway bifurcation angles (45, 60, 90, 135, 180°) were constructed for horizontal roadway and inclined roadway, respectively. Based on social force theory, the changing characteristics and main forces of roadway bifurcation angles with evacuation time were analyzed, and a relationship model between roadway bifurcation angles and evacuation parameters was established. The orthogonal test was used to investigate the influence of the length, width and position of obstacles on the evacuation efficiency of miners. The results showed that the evacuation process of roadway could be divided into queue passage stage, competitive balance stage and social force effect stage, and the evacuation time decreased with the increase of roadway bifurcation angle, which followed with the cubic polynomial relationship. The optimum bifurcation angle was determined to be 135°. The order of the influence of obstacles on evacuation efficiency is the width of the obstacle> the length of the obstacle > the position of the obstacle, and the width of the obstacle has an exponential relationship with the evacuation time. Taking the roadway bifurcation angle, slope and obstacle width as the static influence coefficients, the calculation shows that under the optimal bifurcation angle, the equivalent length of the roadway is significantly affected by the obstacle width when the obstacle width is greater than 2 m.
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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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