Numerical simulation study on dynamic response stability of concrete roadway floor in Lijiahao Coal Mine

doi:10.16265/j.cnki.issn1003-3033.2025.S1.0022

Abstract

Abstract:

In order to solve the problem of road structure damage caused by cyclic heavy load of underground vehicles in coal mines, which affects the stability of roadway floor and threatens safety production, the finite element software simulation method was used to analyze the dynamic response of the concrete roadway floor of Lijiahao Coal Mine under the moving load of the trackless rubber-tyred vehicle. The influence of the dynamic load of the trackless rubber-tyred vehicle on the concrete roadway of Lijiahao Coal Mine was determined. First, ABAQUS software was used to model the roadway floor of Lijiahao Coal Mine; then, the dynamic response of vertical displacement and stress at different positions in the model of the roadway floor of Lijiahao Coal Mine under the action of vehicle moving load was analyzed. Finally, the dynamic response of the most unfavorable position of the roadway floor of Lijiahao Coal Mine under different axle loads was explored. The results show that the vertical displacement of the top surface of the surface layer and the horizontal stress of the bottom surface of the base layer are the most unfavorable dynamic response positions under different axial loads, which provides guidance for the design of the concrete roadway structure of the Lijiahao Coal Mine.

Key words: roadway floor, dynamic response, moving load, ABAQUS, vertical displacement

CLC Number:

X936

YU Mingsheng, CHEN Kai, HUANG Fei, LIU Long, ZHANG Zilong, SHI Zhanshan. Numerical simulation study on dynamic response stability of concrete roadway floor in Lijiahao Coal Mine[J]. China Safety Science Journal, 2025, 35(S1): 144-150.

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结构层	材料类型	弹性模量/ MPa	密度/ (kg·m^-3)	泊松比
面层	混凝土	31 000	2 350	0.20
基层	水泥稳定碎石	1 500	2 200	0.25
地基	泥岩	1 000	2 500	0.30

结构层	平面尺寸/(m×m)	厚度/m
面层	5×6	0.25
基层	5×6	0.20
地基	10×9	8.00

无轨胶轮车竖向轴载/kN	440	990
车轮接触面长×宽/(cm×cm)	30.6×24.0	39.69×31.2
接触面压强/MPa	1.2	1.6