Abstract: The dynamics in the forward collision of a sliding vehicle are analyzed to explain the necessity of installing protective devices in mine tunnel in this paper. The acceleration of the sliding vehicle and the speed before the collision are deduced through the force analysis of the sliding vehicle in the mine tunnel using Newtonian mechanics. Both unprotected and protected vehicledriver collision models are developed to simplify the collision constraint relationship among vehicle, driver and wall and construct the vibration system between vehicle and hit target. The two collision models are simulated by MATLAB/Simulink under the conditions of mine tunnel inclination of 6°, vehicle weight of 2 600 kg, driver weight of 70 kg and sliding distance of 50, 100, 150 m and 200 m. The results show that the use of protective devices can reduce the maximum acceleration of the vehicle and the driver by 25.5% and 12.0%, respectively, compared with no protective device, and can play a protective role in the sliding distance of the vehicle within 100 m.

Key words: vehicle sliding; collision protection; vehicle acceleration; vehicle collision model

摘要： 文章对正向碰撞的失速车辆进行动力学分析，说明矿井巷道安装防护装置的必要性。 对巷道失速车辆进行受力分析，采用牛顿力学推导出车辆失速加速度与碰撞前的车速；通过 简化车辆、驾驶员、巷道壁的约束关系，构建车辆与受撞目标的振动系统，建立出无防护装 置和有防护装置的车辆-驾驶员碰撞模型。利用 MATLAB/Simulink 对建立的两种碰撞模型在 巷道倾角为 6°，车身质量为 2 600 kg，驾驶员质量为 70 kg，失速距离分别为 50、100、150、 200 m 条件下进行数值模拟，结果表明：相对无防护装置，采用防护装置可分别将车辆、驾 驶员的最大碰撞加速度降低 25.5%与 12.0%，能在失速距离 100 m内对模拟车辆起到防护作用。

关键词: 车辆失速；碰撞防护；车辆加速度；车辆碰撞模型