Influence of roadway bifurcation angle and obstacles on evacuation efficiency of miners

doi:10.16265/j.cnki.issn1003-3033.2025.06.1174

Abstract

Abstract:

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.

Key words: roadway bifurcation angle, obstacle, evacuation efficiency, emergency evacuation, social forces

CLC Number:

X936

SI Junhong, YU Yuejie, LI Lin, FAN Ruoting. Influence of roadway bifurcation angle and obstacles on evacuation efficiency of miners[J]. China Safety Science Journal, 2025, 35(6): 209-215.

Figures/Tables 9

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Table 1

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序号	η_pi=0.221		序号	η_pi=0.429
序号	η_oi	L_i/m	序号	η_oi	L_i/m
1	0.332	32.609	6	0.332	36.981
2	0.333	32.617	7	0.333	36.989
3	0.339	32.741	8	0.339	37.114
4	0.421	34.479	9	0.421	38.851
5	0.808	42.597	10	0.808	46.969